CN115076713A - Power recording and air ratio control by means of sensors in the combustion chamber - Google Patents

Abstract

Power recording and air ratio regulation by means of sensors in the combustion chamber. A method for regulating a combustion apparatus comprising a combustion chamber and a first temperature sensor in the combustion chamber and a second temperature sensor in the combustion chamber, the method comprising the steps of: recording a first signal of a first temperature sensor and a second signal of a second temperature sensor; determining a first combustion power as a function of the first signal using a first characteristic curve which describes the course of the combustion power as a function of the signal of the first temperature sensor for the first temperature sensor; determining a second combustion power as a function of the second signal using a second characteristic curve, which specifies the course of the combustion power as a function of the signal of the second temperature sensor for the second temperature sensor; the current combustion power of the combustion device is determined as a function of the first and second combustion powers.

Description

Power recording and air factor adjustment by means of sensors in the combustion chamber

technical field

The present disclosure relates to control and/or regulation used in conjunction with combustion sensors in combustion equipment, such as gas burners. Combustion sensors in combustion plants are, for example, ionization electrodes and/or optical sensors. In particular, the present disclosure relates to the regulation and/or control of combustion equipment in the presence of hydrogen.

Background technique

During operation of the combustion plant, the combustion power of the combustion plant must be known and/or must be adjusted. For the combustion of hydrocarbons or pure hydrogen or a mixture of the two, the air supply and the fuel supply must be mutually adjusted. Thereby, the correct air coefficient λ is achieved.

Furthermore, external influences may affect air ratio and/or combustion power. Such external influences are, for example, the inlet pressure of the fuel, in particular the fuel gas, and the fuel composition. Other examples of external influences are ambient temperature, ambient pressure and changes in the intake path of the combustion device and in the exhaust path of the combustion device.

In addition to the sensors mentioned, such sensors for monitoring the flame in a safety-oriented manner can be included in the regulation of the combustion power and/or the air ratio of the combustion plant.

To date, optical flame monitoring has been used for the combustion of pure hydrogen in combustion plants. At the same time, optical sensors for recording signals during combustion are expensive.

Also conceivable are thermocouples and/or resistance temperature sensors as sensors for recording the signal of combustion. Thermocouples and/or resistance temperature sensors are to be thermally coupled to the combustion feed air and/or mixture and/or exhaust gas and/or plasma at the combustion plant. Thermocouples and/or resistance temperature sensors are also thermally coupled to the mechanical base. With those couplings, thermocouples and/or resistance temperature sensors have hitherto been too slow for fuel process monitoring.

In particular, such elements and sensors tend to be slow for monitoring flames in combustion equipment.

SIEMENS BUILDING TECH AG filed European patent application EP1154202A2 on April 27, 2001. The application was published on November 14, 2001. EP1154202A2 discusses a regulating device for a burner. EP1154202A2 claims priority of 12 May 2000. EP1154202A2 is granted European patent EP1154202B1. The patent document EP1154202B2 also exists after the opposition procedure.

EP1154202B2 distinguishes between low calorific value and high calorific value fuel gases. To differentiate the two fuel gases, two characteristic curves are used. The two characteristic curves are in each case related to the control signal for the control mechanism of the combustion system as a function of the fan speed of the combustion system. The control signals corresponding to these characteristic curves are weighted in order to regulate the combustion device.

EP1154202B2 also claims: the use of additional sensors to regulate combustion equipment. Those additional sensors influence the state of the adjustment mechanism of the combustion apparatus depending on their sensor results. EP1154202B2 mentions changes in boiler temperature as an example of measurement data obtained from those additional sensors.

EBM PAPST LANDSHUT GMBH filed patent application DE102004030300A1 on June 23, 2004. The application was published on January 12, 2006. DE102004030300A1 discusses a method for adjusting operating parameters of a combustion device.

DE102004030300A1 discloses a mixing zone into which the air supply and the gas supply lead. Lead out the line from this mixing area. This line ends in the burner section. The flame is arranged above the burner section. Temperature sensors are selectively disposed on the surface of the burner portion. The temperature sensor can also be arranged at other locations within the range of action of the flame. Here, the temperature sensor can

- Arranged in the heart of the flame,

- placed at the foot of the flame,

- placed at the tip of the flame,

- However, it can also be arranged at a distance from the flame, eg on the burner plate itself. By determining and recording the actual temperature measured in the range of action of the burner flame, which depends on the adjusted mixing ratio, the maximum temperature value and the associated mixing ratio are determined.

Another patent application DE102004055716A1 was filed by EBM PAPST Landshut GmbH on 18.11.2004. The application was published on January 12, 2006. DE102004055716A1 discusses a method for regulating and controlling a combustion device. DE102004055716A1 claims priority of 23 June 2004.

DE102004055716A1 likewise discloses a mixing zone into which the air supply and the gas supply lead. Lead out the line from this mixing area. This line ends in the burner section. The flame is arranged above the burner section. The temperature sensor can be arranged, for example, in the region of the flame, but also in the vicinity of the flame on the burner. For example, thermocouples can also be used as temperature sensors. DE102004055716A1 teaches adjusting the temperature T _ist produced by the combustion device to a target temperature T _soll . Here, a characteristic curve is used, which shows that the target temperature T _soll depends on the air mass flow and/or the load on the combustion device. The air coefficient λ remains constant as another parameter.

International patent application WO2006/000367A1 was filed by EBM PAPST Landshut on June 20, 2005. The application was published on January 5, 2006. WO2006/000367A1 discusses a method for adjusting the air coefficient at a combustion device. WO2006/000367A1 claims priority of 23 June 2004.

WO2006/000367A1 likewise discloses a mixing zone into which the air supply and the gas supply lead. Lead out the line from this mixing area. This line ends in the burner section. The flame is arranged above the burner section. The temperature sensor can be arranged, for example, in the region of the flame, but also in the vicinity of the flame on the burner. For example, thermocouples can also be used as temperature sensors. Temperature sensors are selectively disposed on the surface of the burner portion. The temperature sensor can also be arranged at other locations within the range of action of the flame. Here, the temperature sensor can

- Arranged in the heart of the flame,

- placed at the foot of the flame,

- placed at the tip of the flame,

- However, it can also be arranged at a distance from the flame, eg on the burner plate itself. The method in WO 2006/000367 A1 is based on the fact that the actual temperature T _ist recorded by the temperature sensor depends on the air coefficient λ. The actual temperature reaches a maximum value T _max at λ = 1 . Now, for a predetermined air mass flow _{ml, the maximum value T max is} determined by means of a temperature sensor by iteratively adapting the gas mass flow. Then, the air factor is preferably adjusted to λ =1.3 and the air mass flow m _L is correspondingly increased.

Electrolux APPLIANCES AB, SE filed another international patent application WO2015/113638A1 on February 3, 2014. The application was published on August 6, 2015. WO2015/113638A1 teaches a gas burner application and a gas cooking device.

WO2015/113638A1 discloses a monitoring device by means of which the gas supply is cut off in the absence of a flame. To this end, the monitoring device cooperates with a shut-off device comprising a valve. The monitoring device may include thermocouples or other sensors. Therefore, the monitoring device is based on safety.

NORITZ CORP filed Japanese patent application JP2017040451A on August 21, 2015. The application was published on February 23, 2017. JP2017040451A discusses a combustion device.

JP2017040451A is particularly devoted to detecting the flame temperature taking into account the delay of the corresponding sensor. Thermocouples and thermistors are called sensors. To account for those delays, prediction units are used. The prediction unit determines the value by multiplying the difference between the temperature recorded in the past and the current temperature by a coefficient. That value is added to the currently recorded temperature. The factor required for determining that value depends on the delay time and the predetermined time period.

The delay of the sensor is covered in IST's 2020 RTD Platinum Sensor Specification. The response time until the sensor tracked a 63% temperature change due to the delay varied between 2.5 and 40 seconds. Typically, this response time depends on the size of the respective sensor.

Pneumatic gas-air complexes and/or electronic complexes can be considered for adjusting the combustion equipment. Technically, modulation ranges from one to seven are usually achieved with pneumatic gas-air complexes.

When pure hydrogen is burned, no practically usable signal is formed at the ionization electrode. Therefore, ionization electrodes are hardly suitable for recording the signal when pure hydrogen is burned. Consequently, an electronic complex regulated as a function of the flame signal has so far been technically only possible for hydrocarbon-containing fuel gases.

Furthermore, in the case of electronic complexes, the combustion power and air supply depend only on the fan speed. As long as the use of other sensors is prohibitively expensive, it is almost impossible to correct for environmental effects. Such environmental influences relate, for example, to changes in air temperature, air pressure and in the intake or exhaust path of the combustion device.

The electronic complex for the combustion of hydrogen requires additional sensors, eg for detecting and protecting the fuel gas quantity, in order to adjust the fuel gas quantity without combustion regulation. At the same time, such additional sensors are expensive.

An object of the present disclosure is to provide a regulation and/or control that enables combustion of a fuel gas containing hydrogen. The purpose of the present disclosure is, in particular, to provide a regulation and/or control which achieves a sufficient degree of modulation. This conditioning can also be used for hydrocarbon-containing fuel gas and/or for mixtures of hydrocarbon-containing fuel gas and hydrogen.

SUMMARY OF THE INVENTION

It is difficult to regulate and/or control a combustion plant based on a single signal of a temperature sensor, whose signal is mainly dependent on the position of the temperature sensor in the combustion chamber of the combustion plant. The consideration in this case is that the temperature signal is a function of the supply of the fuel-air mixture and thus depends on the combustion power. Furthermore, the temperature signal also depends on the mixing ratio between fuel and air and thus on the air ratio. It is almost impossible to obtain a unique assignment of the measured temperature value to exactly one combination of combustion power and air coefficient with only one temperature sensor. Therefore, additional signals are usually required. This signal is usually air supply as a proxy for mixture supply or combustion power. Using the measured temperature in or near the flame, the air coefficient can then be adjusted according to a predetermined characteristic curve as a function of the measured value and the air supply. Such a method is described in EP1902254B1, in which the measured temperature is output within a range of values as a function of air coefficient and combustion power. Alternatively, the air coefficient can be used as an additional signal, and the mixture supply, ie the combustion power, can be determined from the air coefficient and the measured temperature. The recording or determination of the fuel supply, in particular the gas supply, can also provide this additional signal.

A sufficiently precise sensor for determining the air supply, the mixture supply or the fuel supply is correspondingly expensive. Less expensive sensors do not register ambient conditions such as fluctuations in air temperature, air pressure or also fluctuations in the intake and/or exhaust path. Such an inexpensive sensor is, for example, the fan speed recording of a fan. Therefore, that sensor has the disadvantage that it only determines the air supply incompletely.

The present disclosure addresses those difficulties by placing more than one sensor in the combustion chamber of the combustion apparatus. In particular, more than one temperature sensor can be arranged in the combustion chamber of the combustion plant. The signals of the two sensors, in particular the two temperature sensors, are read and each processed into a value for the combustion power. The signals of the two sensors, in particular the two temperature sensors, can likewise be processed in each case into a value for the air coefficient λ. The regulation and/or control can then be carried out based on the determined combustion power and/or the determined air coefficient λ.

The individual processing of the individual measurement signals into values for the combustion power or the air factor or the combination of the combustion power and the air factor is generally not unique.

In the case of a multi-valued assignment of the individual signals to different combustion powers, the possible combustion powers that are adapted to the individual signals are determined. A pair is formed of the combustion power determined from the signal of the first-mentioned sensor and the combustion power determined from the signal of the second-mentioned sensor. Choose the pair with the smallest difference in combustion power. Based on the pair, the current combustion power of the combustion device is determined.

Those ambiguities can also be resolved by arranging another sensor, in particular another temperature sensor, in the combustion chamber. The signal is read from the further sensor, in particular from the further temperature sensor. The read signal is processed a third time into a value for the combustion power and is included together in the determination of the current combustion power of the combustion plant.

Another possibility to address ambiguity is to include the supply signal in the evaluation. Such a supply signal can be, for example, the fan speed of a fan in the air supply channel. Such a supply channel can likewise be the signal of a flow sensor in the air supply channel or in the fuel supply channel. The supply signal may also be obtained from the state of the air damper and/or from the state of the fuel actuator. The use of the supply signal has the advantage that the assignment of the supply signal to the combustion power is often unique.

Two characteristic curves for determining the combustion power pair are specified for a predetermined air ratio. With a corresponding positioning of the two sensors in the combustion chamber, there is exactly one point pair of two sensor values, where the two combustion powers are the same for all possible air factor values.

With the method described, the combustion power can be determined within a range of values as a function of the corresponding measurement signal, given a target value of the air coefficient. This determination is made for each sensor arranged in the combustion chamber. In this way, not only the air ratio but also the combustion power can be adjusted to a predetermined target value. The combustion power depending on the relevant sensor signal can be registered as a polynomial for both functions. In a preferred embodiment, the two functions can be registered as a sequence of points between which linear interpolation is performed over the minimum distance between the two points. If other sensors are used, three or more sensors register the function of combustion power over a range of values. The other sensor can be, for example, a third sensor in the combustion chamber or a supply sensor.

The adjustment is carried out, for example, by first adjusting the air actuator or, alternatively, the fuel actuator, until the two combustion powers are the same or close to each other. Then, the combustion power is calculated, for example as the average of the two calculated combustion powers. Then, eg via a control loop, the air and fuel actuators are adjusted so that the calculated combustion power is at its target value. The resulting possible deviation of the air coefficient from the target value is readjusted again by the air actuator or, alternatively, the fuel actuator. As a result of the readjustment, the combustion power calculated from the two measurement signals is again the same.

Alternatively, the air ratio and combustion power can be adjusted together within the deadband of the target value by means of multi-loop regulation.

By correcting the air coefficient, changes due to external influences on the fuel can be corrected. Changes in fuel composition first affect the air coefficient. By the methods disclosed herein, deviations in air coefficients are corrected. Likewise, changes in fuel inlet pressure and/or fuel temperature and/or air pressure and/or air temperature may be corrected for by air coefficient adjustment.

External influences on the combustion power can likewise be compensated, since the combustion power can be recalculated and adjusted to a predetermined target value. In this way, variations in the intake/exhaust paths can also be corrected in terms of air ratio and combustion power.

Description of drawings

Various features will become apparent to those skilled in the art from the following detailed description of the disclosed non-limiting embodiments. The accompanying drawings that participate in the detailed description can be briefly described as follows:

Figure 1 shows a combustion plant with two sensors for flame monitoring in the combustion chamber;

FIG. 2 shows the evolution of the combustion power as a function of the measurement signal of a sensor arranged in the combustion chamber when the distribution is unique;

FIG. 3 shows the course of the combustion power as a function of the signals of two sensors arranged in the combustion chamber when the distribution of the sensors is not unique;

FIG. 4 shows the variation of combustion power with the signals of two sensors arranged in the combustion chamber when the signal variation intersects;

FIG. 5 shows the course of the combustion power as a function of the signals of two sensors arranged in the combustion chamber and the course of the deviation of the two signals when the mixture becomes lean;

6 shows the course of the combustion power as a function of the signals of two alternatively arranged sensors in the combustion chamber and the course of the deviation of the two signals when the mixture becomes lean;

Figure 7 shows the air supply for two different intake-exhaust paths as a function of the air supply signal;

FIG. 8 shows the course of two predefined control curves for the fuel gas valve and the calculated control curve for the current fuel and/or gas parameters.

Detailed ways

Figure 1 shows a combustion device 1, such as a wall mounted gas burner and/or a floor mounted gas burner. During operation, the flame of the heat generator burns in the combustion chamber 2 of the combustion device 1 . The heat generator exchanges the thermal energy of the hot fuel gas into another fluid, such as water. Use of hot water, for example to operate a hot water heating system and/or to heat drinking water. According to another embodiment, the thermal energy of the hot fuel and/or the fuel gas can be used to heat objects, for example, in an industrial process. According to another embodiment, the heat generator is a cogeneration system, such as an engine of such a system. According to another embodiment, the heat generator is a gas turbine. Furthermore, heat generators can be used to heat water in the system for obtaining lithium and/or lithium carbonate. The exhaust gas 10 is discharged from the combustion chamber 2 via a flue, for example.

The air supply 5 for the combustion process is supplied via a (motorized) driven fan. Via the signal line 14 , the control and/or regulating device 13 predetermines to the fan the air supply VL that the fan is to deliver _. Thereby, the fan speed of the fan speed sensor 12 is referred to as a measure of the air supply 5 .

According to one embodiment, the fan speed determined by the sensor 12 is fed back to the control and/or regulation device 13 by the fan and/or by the fan's drive device 4 and/or by the air actuator 4 . For example, the control and/or regulation device 13 determines the rotational speed of the fan via the signal line 15 .

The control and/or regulation device 13 preferably comprises a microcontroller. Ideally, the control and/or regulation device 13 comprises a microprocessor. The control and/or regulating device 13 may be a regulating device. Preferably, the adjustment means comprise a microcontroller. Ideally, the adjustment device includes a microprocessor. The regulating means may comprise a proportional integral regulator. The adjusting device may further include a proportional-integral-derivative regulator.

The control and/or regulation device 13 may also include field programmable (logic) gate assemblies. The control and/or regulation means 13 may also comprise application specific integrated circuits.

In one embodiment, the signal lines 14 or 15 comprise optical waveguides. In a special embodiment, the signal lines 14 or 15 are implemented as optical waveguides. Optical waveguides have advantages in galvanic separation and explosion protection.

If the air supply 5 is regulated by an air damper and/or valve, the damper and/or valve state may be used as a measure of the air supply 5 . Measurements derived from the signals of the pressure sensor 12 and/or the mass flow sensor 12 and/or the volume flow sensor 12 can also be used.

According to one embodiment, the air supply VL is the value of the current air flow _. Air flow can be measured and/or stated in cubic meters of air per hour. Thus, the air supply VL may be measured and/or specified in cubic meters of air per hour _.

_The fuel supply VB is regulated and/or regulated by the control and/or regulating device 13 by means of at least one fuel actuator 7 - 9 and/or at least one (electrically) adjustable valve 7 - 9 . In the embodiment of Figure 1, the fuel 6 is a fuel gas. The combustion apparatus 1 may then be connected to various sources of fuel gas, such as to a source high in methane and/or to a source high in propane. It is also provided that the combustion device 1 is connected to a source of gas or gas mixture, wherein the gas or gas mixture comprises hydrogen. In a special embodiment it is provided that more than five percent, in particular more than five percent, of the gas or gas mixture is hydrogen. In another special embodiment it is provided that the fuel gas or fuel gas mixture contains exclusively or substantially exclusively hydrogen. In another embodiment it is provided that, variably, zero to thirty percent of the mass of the fuel and/or gas and/or gas mixture is hydrogen. In FIG. 1 , the fuel gas quantity is adjusted by the control and/or regulating device 13 via at least one (electrically) adjustable fuel valve 7 - 9 . In this case, the actuation value of the gas valve 7 - 9 , for example the pulse width modulated signal, is a measure of the fuel gas quantity. This _{manipulated value is also the value of the fuel supply VB} .

If a gas damper is used as the fuel actuator 7-9, the position of the damper can be used as a measure of the amount of fuel gas. According to a special embodiment, the fuel actuator 7-9 and/or the fuel valve 7-9 are adjusted by means of stepper motors. In that case, the step position of the stepper motor is a measure of the amount of fuel gas. The fuel valve and/or the fuel flap can also be integrated in a unit with at least one or more safety shut-off valves 7 , 8 . Signal lines 16 connect the fuel actuator 7 to the control and/or regulating device 13 . Another signal line 17 connects the fuel actuator 8 to the control and/or regulating device 13 . Yet another signal line 18 connects the fuel actuator 9 to the control and/or regulating device 13 . In a particular embodiment, the signal lines 16-18 each comprise an optical waveguide. Optical waveguides have advantages in galvanic separation and explosion protection.

Furthermore, at least one of the fuel valves 7-9 may be a valve internally regulated by a flow and/or pressure sensor, which valve obtains a target value and adjusts the actual value of the flow and/or pressure sensor to this target value. Here, the flow and/or pressure sensor can be implemented as a volume flow sensor, for example as a turbine flowmeter and/or a bellows counter and/or a differential pressure sensor. The flow and/or pressure sensor can also be implemented as a mass flow sensor, for example as a thermal mass flow sensor.

FIG. 1 likewise shows the combustion device 1 with the first sensor 19 . The sensor 19 is preferably arranged in the combustion chamber 2 . Advantageously, the first sensor 19 comprises a first temperature sensor 19 . Ideally, the first sensor 19 is the first temperature sensor 19 .

The signal line 21 connects the temperature sensor 19 to the control and/or regulating device 13 . In a particular embodiment, the signal line 21 comprises an optical waveguide. Optical waveguides have advantages in galvanic separation and explosion protection.

FIG. 1 likewise shows the combustion device 1 with the second sensor 20 . The sensor 20 is preferably arranged in the combustion chamber 2 . Advantageously, the second sensor 20 comprises a second temperature sensor 20 . Ideally, the second sensor 20 is a second temperature sensor 20 .

Signal lines 22 connect the temperature sensor 20 to the control and/or regulating device 13 . In a particular embodiment, the signal line 22 includes an optical waveguide. Optical waveguides have advantages in galvanic separation and explosion protection.

FIG. 2 shows the signal progression 24 of the combustion power 23 as a function of the sensor signal of the first sensor 19 for a fixed fuel gas with a predetermined, constant mixing ratio. In FIG. 2 , the sensor 19 is arranged such that the sensor signal can be uniquely assigned the combustion power 23 . Such a signal profile 24 is obtained, for example, when the temperature sensor 19 is installed close to the burner 3 . The characteristic curve 24 differs from the characteristic curve mentioned in EP 1 902 254 B1 in that it has a combustion power 23 along the ordinate instead of a temperature signal. That is, the combustion power 23 can thus be determined from this signal via the characteristic curve 24 shown in FIG. 2 . For this purpose, the air ratio λ is adjusted for each combustion power 23 . In a preferred embodiment, the characteristic curve 24 is registered in the control and/or regulation device 13 . Assignments are also made there. Alternatively, the characteristic curve 24 can be registered in an electronic circuit at the first temperature sensor 19 or in any other unit. Evaluation is also done there.

Using the characteristic curve 24, the combustion power 23 can be determined directly, so that no air supply sensor is required. If the fuel gas metering is directly assigned to the air supply 5 , the combustion power 23 and the air supply 5 are likewise directly assigned to each other. Thereby, the air supply 5 can be adjusted by the mentioned distribution between the combustion power 23 and the air supply 5 and by the control signal according to the line 14 . As an alternative, the air supply 5 can be regulated in this way by means of a closed-loop control loop. In a preferred embodiment, the air supply signal is present, but the distribution between the air supply 5 and this signal is externally influenced. This may be, for example, changes in air temperature and/or ambient pressure and/or intake/exhaust paths. Typically, the signal in which this variation is not compensated is the fan speed signal of the fan 4 or the position feedback of the air damper. The distribution between the air supply 5 and the sensor signal on the line 12 can be periodically recalibrated during operation relative to reference conditions. This recalibration takes place by means of the sensor signal and the combustion power 23 determined by the characteristic curve 24 and by means of the distribution between the combustion power 23 and the air supply 5 . This procedure has the advantage that the air supply 5 and thereby the combustion power 23 can be rapidly changed using the sensor signals on the line 12 . Correspondingly, the correction by the characteristic curve 24 is much slower. It is also possible to correct the characteristic curve of the gas supply sensor, for example the fuel supply depending on the position of the gas flap state. In this case, the air control signal on line 14 and thus the air supply 5 are directly assigned to the fuel metering.

The course of the characteristic curve 24 depends to a large extent on the position of the sensor in the combustion chamber 2 . Sensor locations in the vicinity of or directly on the burner 3 have the disadvantage that the dynamics of the sensor signal are affected by the thermal capacity of the burner 3 . Thereby, the adjustment becomes slow. Furthermore, it is also contemplated to use the first sensor 19 for flame monitoring at the same time. In order to be able to monitor the flame, the sensor 19 must be arranged at a position within the flame zone or close to the flame zone. For flame monitoring, the sensor 19 should also react quickly enough, ie with a sufficiently small time constant. FIG. 3 shows the course of the characteristic curve 24 of the combustion power 23 as a function of the sensor signal from the line 21 when the sensor 19 is arranged in the combustion chamber 2 or in or near the flame.

As can be seen in FIG. 3 , the combustion power 23 can no longer be assigned exclusively to the sensor signal from the line 21 via the characteristic curve 24 . Thus, a second sensor 20 is installed in the combustion chamber 2 , which assigns the sensor signal from the line 22 to the combustion power 23 via a characteristic curve 25 that differs from the characteristic curve 24 . In order to be able to uniquely assign the two sensor values to the combustion power 23 as a function of the two variables by means of the two characteristic curves 24 and 25 , for all values of the combustion power 23 , within the range of possible values of the combustion power 23 , the point pair with the signal on lines 21 and 22 is only allowed to occur once, which point pair is assigned to the corresponding value of the combustion power 23 via the characteristic curves 24 and 25 .

The two characteristic curves 24 and 25 can be registered in the control and/or regulating device 13 , for example, as polynomials. The assignment is then carried out by means of a specification, in which case the different fuel gas powers for the currently recorded signals 21 and 22 are calculated by means of the characteristic curves 24 and 25 . In a preferred embodiment, the characteristic curve 24 is registered as a sequence of value pairs (21/23) and (22/23). The signals from lines 21 and 22 may be between corresponding pairs of registered values (21/23) and (22/23). Next, corresponding, adjacent pairs of values (21/23) and (22/23) are determined for the signals from lines 21 and 22. To determine the combustion power 23, linear interpolation is performed.

Then, the deviation of the combustion power 23 for the signals from lines 21 and 22 is determined. For this purpose, the difference between all calculated combustion powers 23 from the characteristic curve 24 and all calculated values from the characteristic curve is determined. From the two combustion powers 23 with the smallest difference, for example an average value or one of the two calculated values is taken as the assigned value. If for the signals from the lines 21 , 22 exactly one combustion power 23 is present in the characteristic curves 24 , 25 for at least one of the two characteristic curves 24 , 25 , this is taken as the result.

Figure 4 shows that the two characteristic curves can also intersect. Using this characteristic curve, the combustion power 23 and thus the air supply 5 can also be determined as long as the above-mentioned unique assignment conditions are fulfilled.

If the unique assignment condition is no longer fulfilled, the assignment can be made unique by means of another signal. This further signal can come from another sensor in the combustion chamber 2 which clarifies the distribution in the case of a corresponding signal with a non-unique distribution. With this further sensor in the combustion chamber 2 a further characteristic curve is registered, with which the combustion power 23 can be uniquely determined as described above.

Air supply sensors and/or fuel supply sensors are particularly preferred as third sensors. If the fan speed or the position of the air damper is used as the air supply sensor, the feedback signal on line 15 can be used to clarify the unique assignment despite its inaccuracies described above. Such clarification can in particular take place when the fuel gas values with the same or similar value pairs are far away from each other. Here, the fuel gas values on the lines 21 , 22 with identical or similar pairs of measured values are advantageously outside the error range of the mentioned external influences.

With the described method and the described device, however, it is not only possible to determine the combustion power 23 and the air supply 5 from the signals on the lines 21 , 22 of the sensors 19 , 20 in the combustion chamber 2 . Likewise, with the described method and the described device, it is not only possible to determine the fuel supply 6 of a fixedly predetermined mixture of fuel gases. With the measures presented, it is also possible to meter fuel, in particular fuel gas, in the correct ratio relative to the air supply 5 . The prerequisite for this is that the air supply 5 and the fuel supply 6 can be freely adjusted by corresponding actuators 4 , 9 for the air and for the fuel. FIG. 5 shows the response of the signals of lines 21 and 22 with combustion power 23 . FIG. 5 relates to the situation in which the mixture becomes too lean compared to the adjusted air coefficient λ, ie there is too little fuel gas relative to the target value. The characteristic curves 24 and 25 correspond to the sensor signals on lines 21 and 22 for different combustion powers 23 when the mixture is adjusted such that the target air ratio λ _soll is reached. If the mixture becomes thinner, a characteristic curve 26 for sensor 19 and a characteristic curve 27 for sensor 20 are obtained. Typically, the characteristic curve 24 is shifted relative to the characteristic curve 25 by a different value than the characteristic curve 26 relative to the characteristic curve 27 due to the thinning.

In principle, for the desired correction of the air coefficient λ, instead of the characteristic curves 24 and 25, two characteristic regions can be registered as a function of the combustion power 23 with the corresponding temperature values from the lines 21 and 22 and the corresponding air coefficient λ. Next, the combustion power 23 and the air ratio λ can be uniquely determined. The premise is that for each point of combustion power 23 and air coefficient λ, the pair of signal values from lines 21, 22 occurs only once in both regions through all obtained point pairs. If a point pair is determined, the current combustion power 23 and the current air coefficient λ can be directly assigned to this point pair. Then, the two actuators 4 and 9 can be corrected to target values.

The uniquely determinable conditions mentioned for this correction cannot always be observed for these two regions. Thus, the third signal is usually required in order to uniquely determine the combustion power 23 and the air coefficient λ. The third signal may come from another sensor in the combustion chamber. However, this third signal is preferably the air supply signal from line 14 or 15 . For example, the third signal may come from fan speed feedback from a fan speed sensor 12 in the fan or the position of an air damper. Again, this third signal can come from the state of the fuel actuator, in particular from the position of the gas damper 9 . With the aid of the additional third sensor value, the positioning of the sensor in the combustion chamber can be significantly easier to achieve in order to satisfy the requirement for a unique assignment of the signal to the combustion power 23 and/or the air coefficient λ in the value range.

Correspondingly, the combustion power 23 and/or the air ratio λ is corrected when the mixture is richer relative to the target air ratio λ _soll . Next, the corresponding characteristic curve for the more concentrated mixture is on the other side of the corresponding characteristic curve 24 or 25 .

Registering the two regions in the control and/or regulating device 13 is expensive. Thus, in a preferred approach, only the two functions 24 , 25 of the combustion power 23 that depend on the two sensor signals 21 , 22 of the sensors 19 , 20 are registered. The characteristic curves 24 , 25 can each be registered as polynomials depending on a plurality of measurement signals. The characteristic curves 24 , 25 can also be registered in the control and/or regulating device 13 as a sequence of points. Linear interpolation is preferably performed between these points. There may also be signals from other sensors, such as a fan speed sensor 12 , at the combustion chamber and/or in the air supply 5 and/or in the fuel supply 6 .

In a first variant, the regulation is carried out by keeping the air supply 5 constant or nearly constant by the air actuator 4 . The fuel supply 6 is changed by the fuel actuator 9 until the determined value of the combustion power 23 from the two characteristic curves 24 , 25 lies within a defined threshold value.

In a second variant, the fuel supply 6 is kept constant or nearly constant by means of the fuel actuator 9 . The air supply 5 is varied by the air actuator 4 until the determined value of the combustion power 23 from the two characteristic curves 24 , 25 lies within a defined threshold value.

The adjustment direction is determined by the difference between the two determined combustion powers 23 , for example by detecting that the difference is decreasing. If there are other sensor values, for example, the sum of the squared calculated differences is compared with a predetermined threshold value. In this way, it is ensured that the actual air ratio λ _ist lies at the target air ratio λ _soll specified according to the characteristic curves 24 , 25 . In a next step, the combustion power P _ist is determined by, for example, calculating the arithmetic mean of the two combustion powers 23 determined by means of the characteristic curves 24 and 25 . Then, the air actuator 4 together with the at least one fuel actuator 7 - 9 is adjusted until a predetermined combustion power P _soll is reached. The air coefficient λ may deviate slightly due to combustion power adjustment. In this case, the air ratio λ can be readjusted as described by adjusting at least one of the fuel actuators 7 - 9 or the air actuator 4 at the target combustion power P _soll .

In a third variant, the combustion power 23 and the air ratio λ are directly adjusted by adjusting the two actuators 4 , 7 - 9 . Reaching the corresponding threshold value of the difference between the combustion powers 23 is registered as a criterion in the multi-loop control as in the first and second variants.

In the above variants, "almost constant" means that the first actuator is adjusted more slowly than the second actuator. Therefore, the target values of the air coefficient λ _soll and the combustion power P _soll can always be reached. In a second variant, the at least one fuel actuator 7 - 9 is adjusted more slowly than the air actuator 4 . In a first variant, the air actuator 4 is adjusted more slowly than the at least one fuel actuator 7 - 9 . Preferably, a process is selected in which the predetermined different speeds of the actuators 4 and 7-9 are used. The at least one fuel actuator 7-9 with a stepper motor drive is faster than the air actuator 4 with an electromechanically adjustable fan wheel and corresponding moment of inertia. Therefore, variant one is usually chosen.

With the described approach, it is ensured that during a combustion power change, the air coefficient λ is corrected first and only then the combustion power 23 . In this way, the combustion plant 1 is always operated with the correct air ratio λ _soll even during combustion power changes. For this reason, the characteristic curves 24 , 25 also correspond to the characteristic curves of the combustion power 23 for the respective sensor 19 , 20 with a predetermined air factor λ _soll . The target air ratio λ _soll with the combustion output 23 has a wide-ranging, arbitrary course defined by the characteristic curves 24 , 25 . In this way, the target air ratio λ _soll can, for example, have an increasing or decreasing course with the combustion power 23 . In a special embodiment, the variation of the target air ratio λ _soll with the combustion power 23 is constant.

The characteristic curve 24 of the first sensor 19 is shown in FIG. 6 for a target air factor value λ _soll and for a lean air factor value 26 . The characteristic curve 25 of the second sensor 20 is also shown at the target air factor value λ _soll and at the lean air factor value 27 . In the case of such a change process, a unique assignment of the sensor signals on the lines 21 and 22 to the air coefficient λ can be reliably achieved, in particular by means of the third sensor signal. Likewise, a unique distribution to the combustion power 23 can be achieved. The third sensor signal can be, for example, the feedback of the fan speed of the fan 4 via the line 15 .

Air Actuator 4 Fuel Actuator 9 Air Actuator 4 Air Actuator 4 Fuel Actuator 9 Fuel Actuator 9 Air Actuator 4

During the adjustment of the combustion power 23 based on the changed combustion power requirement, the air actuator 4 can move over a predetermined characteristic curve of the air supply sensor 12 . This predetermined characteristic curve can be based, for example, on the feedback of the speed of the fan, or else the characteristic curve of the position feedback of the air flap. In FIG. 7 , such a characteristic curve 28 , which is registered in the control and/or regulating device 13 with the feedback 15 of the fan speed of the fan speed sensor 12 , is shown as a reference characteristic curve. The characteristic curve 28 relates to specific and/or well-defined environmental conditions.

Similar signals for the reference conditions apply for the adjustment signal along the line 14 of the fan motor or the air damper state and for the position signal fed back along the line 15 . In this case, the signal is pre-linearized by a characteristic curve registered in the control and/or regulating device 13 with respect to the actuating signal or the feedback position signal of the air supply 5 .

If the current combustion power 23 is determined after the correction of the air coefficient λ, the characteristic curve 28 can be adapted to the current ambient conditions. Such environmental conditions are, for example, changes in air temperature and/or air pressure and/or intake/exhaust paths. For the currently measured fan speed or reference maneuver, the air supply 5 is known as a direct function of the combustion power 23 . Here, "direct function" means that the air supply 5 does not depend on any independent variable of the function other than the combustion power 23 . The supply determined from the characteristic curve 28 is likewise known. Therefore, for the current air supply 5, the correction factor can be determined as the ratio of the two signals. The characteristic curve 28 is corrected to the characteristic curve 29 due to the zero crossing of the characteristic curve with the air supply 5 of the reference air supply signal or the fan speed feedback. Here, each characteristic curve value is multiplied by the determined correction factor. By means of this method, the combustion power 23 and the air supply 5 can be quickly adjusted by means of the corrected characteristic curve 29 . At the same time, the air supply 5 can be slowly corrected by the characteristic curves 24 , 25 . In this way, the two processes are decoupled from each other. By means of an average value filter, fluctuations in the measured value of the combustion power 23 can also be averaged, and in this way the combustion power 23 can be determined stably. This also corrects the combustion power 23 . Here, the speed at which the combustion power changes is not affected.

The characteristic curve over which the fuel actuator 9 travels is shown in FIG. 8 . The two reference characteristic curves 30 , 31 determined for different pressures and/or different fuel gas compositions are registered in the control and/or regulation device 13 . The characteristic curves 30 , 31 describe the gas metering signal with the air supply 5 , represented by the corrected signal value of the air supply 5 or the combustion power 23 . Here, the gas metering signal represents the fuel supply and/or the gas supply. The two characteristic curves 30 , 31 are determined under reference conditions, that is to say for a specific inlet pressure and/or fuel gas composition. The characteristic curve 30 is determined with a high calorific fuel or fuel gas and/or with a high inlet pressure. The characteristic curve 31 is determined with a low-calorie fuel or fuel gas and/or with a low inlet pressure. During operation what is the current ratio of fuel gas to air is determined by shifting the signals from the sensors 19, 20 in the combustion chamber 2 as described above. These signals are shifted to a unique pair of values on the two characteristic curves 24 and 25 by changing the fuel actuator 9 until the target is achieved.

With the current, corrected fuel supply 6 in the case of the assigned air supply 5 , the ratio can be determined by means of a weighted average. The fuel metering signal and/or the gas metering signal is at this ratio. The ratio represents current fuel and/or gas parameters, such as fuel gas composition and/or inlet pressure and/or fuel gas temperature. Since the same scaling applies for all combustion power signals with the same fuel and/or gas parameters, the characteristic curve 32 can be calculated. On the characteristic curve 32 , the fuel actuator 9 can rapidly change its combustion power 23 depending on the current fuel and/or gas parameters. With the aid of the characteristic curve 32 , the fuel actuator 9 can in particular rapidly change its state depending on the current fuel and/or gas parameters.

If at least one fuel parameter and/or gas parameter changes, this is achieved by a correction of the weighting ratio by adapting the sensor signals on lines 21 and 22 to the characteristic curves 24, 25 as described above. New characteristic curves can be calculated with new weighting parameters. The method for calculating the corrected characteristic curve 32 for actuating the fuel actuator 9 with different fuel and/or gas parameters corresponds to the method as described in EP 1 154 202 B2. Using the described method, it is also possible to correct for changes in fuel composition or gas inlet pressure, since these parameters affect the air coefficient λ. The air factor λ is adjusted by means of adaptation to the characteristic curves 24 , 25 described above.

A further advantage of this method is that the flame can be monitored with the two sensors 19 , 20 in order to detect, for example, a flameout. For this purpose, the two signals 21 , 22 generated by the sensors 19 , 20 are used, in addition to the adjustment of the air coefficient λ and the combustion power 23 , to detect the presence or absence of a flame.

In this way, it can be assessed whether at least one of the signals 21 or 22 is below a threshold value. Different threshold values can be selected for sensor signal 21 than for sensor signal 22 . If the corresponding threshold value is below, the temperature is, for example, so low that no flame can burn anymore. A signal is generated with which the safety shut-off valves 8, 9 are closed via the lines 16, 17 so that no combustible fuel can escape without combustion. In another variant, the difference between the two signals 21 and 22 is determined, it being necessary to note that the two signals do not have the same temperature value during operation. If the flame is now out, the two temperatures will quickly equalize. That is, if the difference between the two signals falls below a predetermined threshold, this is detected as a misfire. Make sure that the safety shut-off valves 8 and 9 are closed.

In other words, the present disclosure teaches a method for regulating a combustion device (1) comprising a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a combustion chamber (2) A second temperature sensor (20) in the chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19), the method comprising the steps of:

recording the first signal of the first temperature sensor (19);

recording the second signal of the second temperature sensor (20);

At least one first combustion power ( 23 ) is determined as a function of the first signal using a first characteristic curve ( 24 ), which specifies the combustion power ( 23 ) for the first temperature sensor ( 19 ) ) with the change process of the signal of the first temperature sensor (19);

At least one second combustion power ( 23 ) is determined as a function of the second signal using a second characteristic curve ( 25 ), which specifies the combustion power ( 23 ) for the second temperature sensor ( 20 ) ) with the change process of the signal of the second temperature sensor (20);

determining the current combustion power (23) of the combustion apparatus (1) as a function of the at least one first combustion power (23) and the at least one second combustion power (23); and

The current combustion power (23) of the combustion plant (1) is adjusted to the target power of the combustion plant (1).

The present disclosure also teaches one of the above methods, the method comprising the steps of:

The current combustion power ( 23 ) of the combustion device ( 1 ) is determined as the arithmetic mean of the at least one first combustion power ( 23 ) and the at least one second combustion power ( 23 ).

The present disclosure also teaches one of the above methods, the method comprising the steps of:

The current combustion power ( 23 ) of the combustion device ( 1 ) is determined as the geometric mean of the at least one first combustion power ( 23 ) and the at least one second combustion power ( 23 ).

Preferably, the first characteristic curve (24) is different from the second characteristic curve (25).

In one embodiment, the first characteristic curve ( 24 ) assigns at least two different combustion powers ( 23 ) to the first signal. That is, according to the first characteristic curve ( 24 ), the assignment of the first signal to the combustion power ( 23 ) is not unique. The assignment according to the first characteristic curve ( 24 ) is not injective. In one embodiment, the second characteristic curve ( 25 ) assigns at least two different combustion powers ( 23 ) to the second signal. That is, according to the second characteristic curve ( 25 ), the assignment of the second signal to the combustion power ( 23 ) is not unique. The assignment according to the second characteristic curve ( 25 ) is not injective.

The present disclosure also teaches a method for regulating a combustion apparatus (1) comprising a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and in the combustion chamber The second temperature sensor (20) in (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19), the method comprising the steps of:

recording the first signal of the first temperature sensor (19);

recording the second signal of the second temperature sensor (20);

At least one first combustion power ( 23 ) is estimated as a function of the first signal using a first characteristic curve ( 24 ), which specifies the combustion power ( 23 ) for the first temperature sensor ( 19 ) ) with the change process of the signal of the first temperature sensor (19);

At least one second combustion power ( 23 ) is estimated as a function of the second signal using a second characteristic curve ( 25 ), which specifies the combustion power ( 23 ) for the second temperature sensor ( 20 ) ) with the change process of the signal of the second temperature sensor (20);

determining the current combustion power (23) of the combustion apparatus (1) as a function of the at least one first combustion power (23) and the at least one second combustion power (23); and

The current combustion power (23) of the combustion plant (1) is adjusted to the target power of the combustion plant (1).

The present disclosure also teaches a method for regulating a combustion apparatus (1) comprising a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and in the combustion chamber The second temperature sensor (20) in (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19), the method comprising the steps of:

recording the first signal of the first temperature sensor (19);

recording the second signal of the second temperature sensor (20);

At least one first air coefficient λ is estimated as a function of the first signal using a first characteristic curve, which for the first temperature sensor ( 19 ) describes the change of the air coefficient λ with the first temperature The change process of the signal of the sensor (19);

At least one second air coefficient λ is estimated as a function of the second signal using a second characteristic curve, which for the second temperature sensor ( 20 ) describes the change of the air coefficient λ with the second temperature The change process of the signal of the sensor (20);

determining the current combustion power (23) of the combustion device (1) as a function of the at least one first air coefficient λ and the at least one second air coefficient λ; and

The current air ratio λ of the combustion plant (1) is adjusted to the target power _λsoll of the air ratio.

The present disclosure also teaches one of the above methods, the combustion apparatus (1) additionally comprising at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), the combustion apparatus (1) Adjusting the current combustion power (23) of the device (1) to the target power of the combustion device (1) includes the following steps:

Find the difference between the current combustion power (23) of the combustion device (1) and the target power of the combustion device (1);

An actuator signal is generated based on the difference; and

The actuator signal is sent to the at least one actuator.

The combustion device (1) preferably has an air supply channel which is in fluid connection with the combustion chamber (2). An air actuator (4) acts on this air supply channel. The combustion device (1) preferably has a fuel supply channel, which is in fluid connection with the combustion chamber (2). Air actuators (7-9) act on this fuel supply passage.

The present disclosure also teaches one of the above methods, the method comprising the steps of:

At least one third combustion power ( 23 ) is determined as a function of the first signal using a first characteristic curve ( 24 ), wherein the first characteristic curve ( 24 ) assigns at least two different combustion powers to the first signal (23) such that the at least one third combustion power (23) is different from the at least one first combustion power (23);

finding a first difference between the at least one first combustion power (23) and the at least one second combustion power (23);

finding a second difference between the at least one third combustion power (23) and the at least one second combustion power (23);

comparing the first difference with the second difference;

If the first difference is less than the second difference, selecting the at least one first combustion power ( 23 );

If the second difference is less than the first difference, selecting the at least one third combustion power ( 23 ); and

The current combustion power (23) of the combustion plant (1) is determined as a function of the selected combustion power (23) and the at least one second combustion power (23).

The present disclosure also teaches one of the above methods, the method comprising the steps of:

At least one third combustion power ( 23 ) is determined as a function of the first signal using a first characteristic curve ( 24 ), wherein the first characteristic curve ( 24 ) assigns at least two different combustion powers to the first signal (23), such that the first combustion power (23) is different from the third combustion power (23);

finding a first difference between the at least one first combustion power (23) and the at least one second combustion power (23);

finding a second difference between the at least one third combustion power (23) and the at least one second combustion power (23);

comparing the first difference with the second difference;

If the first difference is less than the second difference, selecting the at least one first combustion power ( 23 );

If the second difference is less than the first difference or if the second difference is equal to the first difference, selecting the at least one third combustion power ( 23 ); and

The current combustion power (23) of the combustion plant (1) is determined as a function of the selected combustion power (23) and the at least one second combustion power (23).

The present disclosure also teaches one of the above methods including the selected combustion power (23), the method comprising the steps of:

The current combustion power ( 23 ) of the combustion device ( 1 ) is determined as the arithmetic mean of the selected combustion power ( 23 ) and the at least one second combustion power ( 23 ).

The present disclosure also teaches one of the above methods including the selected combustion power (23), the method comprising the steps of:

The current combustion power ( 23 ) of the combustion device ( 1 ) is determined as the geometric mean of the selected combustion power ( 23 ) and the at least one second combustion power ( 23 ).

The present disclosure also teaches one of the above methods, the combustion apparatus (1) additionally comprising a further sensor in the combustion chamber (2), wherein the further sensor in the combustion chamber (2) is different from the first A temperature sensor (19) and unlike the second temperature sensor (20), the method comprises the steps of:

recording another combustion signal of the other sensor;

At least one other combustion power ( 23 ) is determined as a function of the further combustion signal using a further characteristic curve, which for the further sensor describes the variation of the combustion power ( 23 ) with the the change in the signal of the other sensor; and

determining the current combustion power ( 23 ) of the combustion plant ( 1 ) as the difference of the at least one first combustion power ( 23 ) and the at least one second combustion power ( 23 ) and the at least one other combustion power ( 23 ) function.

The present disclosure also teaches one of the above methods, the combustion apparatus (1) additionally comprising a further sensor in the combustion chamber (2), wherein the further sensor in the combustion chamber (2) is different from the first A temperature sensor (19) and unlike the second temperature sensor (20), the method comprises the steps of:

recording another combustion signal of the other sensor;

At least one other combustion power ( 23 ) is estimated as a function of the further combustion signal using a further characteristic curve, which for the further sensor describes the variation of the combustion power ( 23 ) with the the change in the signal of the other sensor; and

determining the current combustion power ( 23 ) of the combustion plant ( 1 ) as the difference of the at least one first combustion power ( 23 ) and the at least one second combustion power ( 23 ) and the at least one other combustion power ( 23 ) function.

In one embodiment, the further sensor in the combustion chamber (2) comprises a further temperature sensor in the combustion chamber (2). In a special embodiment, the further sensor in the combustion chamber (2) is a further temperature sensor in the combustion chamber (2). In one embodiment, the further sensor in the combustion chamber (2) comprises an ionization electrode in the combustion chamber (2). In a special embodiment, the further sensor in the combustion chamber (2) is an ionization electrode in the combustion chamber (2).

In one embodiment, the further characteristic curve assigns at least two different combustion powers ( 23 ) to the further signal. That is to say, according to this further characteristic, the assignment of the further signal to the combustion power ( 23 ) is not unique. The assignment according to this further characteristic curve is not injective.

The first characteristic curve ( 24 ), the second characteristic curve ( 25 ) and the further characteristic curve preferably differ in pairs.

The present disclosure also teaches one of the above methods, the combustion apparatus (1) additionally comprising at least one supply channel in fluid connection with the combustion chamber (2), a supply signal in operative connection with the fluid in the at least one supply channel Device (4, 7-9, 12), wherein the supply signal device (4, 7-9, 12) is arranged outside the combustion chamber (2), the method comprising the steps of:

recording the supply signal of the supply signal device (4, 7-9, 12);

The supply-based combustion power ( 23 ) is determined as a function of the supply signal using a supply-based characteristic curve, which specifies the combustion power for the supply signal devices ( 4 , 7 - 9 , 12 ) (23) with the change of the signal of the supply signal device (4, 7-9, 12); and

Determining the current combustion power (23) of the combustion plant (1) as a function of the at least one first combustion power (23) and the at least one second combustion power (23) and the supply-based combustion power (23) .

The present disclosure also teaches one of the above methods, the combustion apparatus (1) additionally comprising at least one supply channel in fluid connection with the combustion chamber (2), a supply signal in operative connection with the fluid in the at least one supply channel Device (4, 7-9, 12), wherein the supply signal device (4, 7-9, 12) is arranged outside the combustion chamber (2), the method comprising the steps of:

recording the supply signal of the supply signal device (4, 7-9, 12);

The supply-based combustion power ( 23 ) is estimated as a function of the supply signal using a supply-based characteristic curve that specifies the combustion power for the supply signal devices ( 4 , 7 - 9 , 12 ) (23) with the change of the signal of the supply signal device (4, 7-9, 12); and

Determining the current combustion power (23) of the combustion plant (1) as a function of the at least one first combustion power (23) and the at least one second combustion power (23) and the supply-based combustion power (23) .

In one embodiment, the supply-based characteristic curve assigns exactly one combustion power ( 23 ) to the supply signal. That is, according to this supply-based characteristic, the distribution of the supply signal to the combustion power ( 23 ) is not unique. The assignment according to the supply-based characteristic is not injective. In a special case, the assignment according to the supply-based characteristic is also surjective.

Provision: the at least one supply channel includes at least one supply channel selected from the following channels:

- air supply channels; and

- Fuel supply channels, especially fuel supply channels. It is also provided that the at least one supply channel is exactly one supply channel selected from the following channels:

- air supply channels; and

- Fuel supply channels, especially fuel supply channels.

The first characteristic curve ( 24 ), the second characteristic curve ( 25 ) and the supply-based characteristic curve preferably differ in pairs.

According to one embodiment, the supply signal means (4, 7-9, 12) are air supply sensors in or on the air supply channel. The air supply sensor may comprise, for example, a turbine flowmeter and/or a bellows counter and/or a differential pressure sensor and/or a mass flow sensor. In a special embodiment, the air supply sensor is a turbine flowmeter and/or a bellows counter and/or a mass flow sensor. In this case, the air supply sensor is in fluid connection with the fluid in the air supply channel, in particular with the air. The air supply sensor is likewise operatively connected to the fluid in the air supply channel, in particular to the air, since the fluid acts on the air supply sensor. According to one embodiment, the supply signal means (4, 7-9, 12) comprise a fan (4) which acts on the air supply channel. The fan ( 4 ) can in particular be a motor-driven fan ( 4 ). The fan (4) is designed to signal, especially communicate, its fan speed. The fan speed of the fan (4) is a measure of the air supply (5). According to yet another embodiment, the supply signalling means (4, 7-9, 12) are fuel supply sensors in or on the fuel supply channel. The fuel supply sensor may comprise, for example, a turbine flow meter and/or a bellows counter and/or a differential pressure sensor and/or a mass flow sensor. In a special embodiment, the fuel supply sensor is a turbine flow meter and/or a bellows counter and/or a mass flow sensor. In this case, the fuel supply sensor is in fluid connection with the fluid in the fuel supply channel, in particular with the fuel and/or with the fuel gas. The fuel supply sensor is likewise operatively connected to the fluid in the fuel supply channel, in particular to fuel and/or fuel gas, since the fluid acts on the fuel supply sensor. According to yet another embodiment, the supply signal device (4, 7-9, 12) comprises at least one fuel actuator (7-9) and/or at least one valve (7-9), the at least one fuel actuator (7-9) Or the at least one valve acts on the fuel supply channel. The at least one fuel actuator (7-9) and/or the at least one valve (7-9) may in particular be at least one fuel valve (7-9) and/or at least one fuel gas valve (7-9). The at least one fuel actuator (7-9) and/or the at least one valve (7-9) are designed to signal, in particular communicate their status. The state of the at least one fuel actuator (7-9) and/or the at least one valve (7-9) is a measure of the fuel supply (6).

The present disclosure also teaches one of the above methods, the combustion apparatus (1) additionally comprising at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), the method comprising Follow the steps below:

sending a change signal to the at least one actuator;

After sending the change signal to the at least one actuator:

recording the third signal of the first temperature sensor (19),

recording the fourth signal of the second temperature sensor (20),

determining at least one third combustion power ( 23 ) as a function of the third signal using the first characteristic curve ( 24 );

determining at least one fourth combustion power ( 23 ) as a function of the fourth signal using the second characteristic curve ( 25 ); and

The current combustion power (23) of the combustion plant (1) is determined as the at least one first combustion power (23), the at least one second combustion power (23), the at least one third combustion power (23) and A function of the at least one fourth combustion power (23).

The present disclosure also teaches one of the above methods, the combustion apparatus (1) additionally comprising at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), the method comprising Follow the steps below:

sending a change signal to the at least one actuator;

After sending the change signal to the at least one actuator:

recording the third signal of the first temperature sensor (19),

recording the fourth signal of the second temperature sensor (20),

estimating at least one third combustion power (23) as a function of the third signal using the first characteristic curve (24);

estimating at least one fourth combustion power (23) as a function of the fourth signal using the second characteristic curve (25);

Another current combustion power ( 23 ) of the combustion plant ( 1 ) is determined as the at least one first combustion power ( 23 ), the at least one second combustion power ( 23 ), the at least one third combustion power ( 23 ) ) and a function of the at least one fourth combustion power (23); and

The current combustion power (23) of the combustion plant (1) is adjusted to the target power of the combustion plant (1).

The present disclosure also teaches one of the above methods, the combustion apparatus (1) additionally comprising at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), the method comprising Follow the steps below:

sending a change signal to the at least one actuator;

After sending the change signal to the at least one actuator:

recording the third signal of the first temperature sensor (19),

recording the fourth signal of the second temperature sensor (20),

determining at least one third combustion power ( 23 ) as a function of the third signal using the first characteristic curve ( 24 );

determining at least one fourth combustion power ( 23 ) as a function of the fourth signal using the second characteristic curve ( 25 );

determining another current combustion power (23) of the combustion plant (1) only as a function of the at least one third combustion power (23) and the at least one fourth combustion power (23); and

The other current combustion power ( 23 ) of the combustion plant ( 1 ) is adjusted to the target power of the combustion plant ( 1 ).

The present disclosure also teaches one of the above methods, the combustion apparatus (1) additionally comprising at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), the method comprising Follow the steps below:

sending a change signal to the at least one actuator;

After sending the change signal to the at least one actuator:

recording the third signal of the first temperature sensor (19),

recording the fourth signal of the second temperature sensor (20),

estimating at least one third combustion power (23) as a function of the third signal using the first characteristic curve (24);

estimating at least one fourth combustion power (23) as a function of the fourth signal using the second characteristic curve (25);

determining another current combustion power (23) of the combustion plant (1) only as a function of the at least one third combustion power (23) and the at least one fourth combustion power (23); and

The other current combustion power ( 23 ) of the combustion plant ( 1 ) is adjusted to the target power of the combustion plant ( 1 ).

The present disclosure also teaches one of the above methods comprising another current combustion power (23), the combustion apparatus (1) additionally comprising selected from the group consisting of an air actuator (4) and a fuel actuator (7-9). ), adjusting the further current combustion power (23) of the combustion device (1) to the target power of the combustion device (1) comprises the steps of:

Find the difference between another current combustion power (23) of the combustion device (1) and the target power of the combustion device (1);

An actuator signal is generated based on the difference; and

The actuator signal is sent to the at least one actuator.

The present disclosure also teaches one of the above-described methods comprising a change signal, the method comprising the steps of:

After sending the change signal to the at least one actuator:

A state of the at least one actuator is changed.

The present disclosure also teaches one of the above-described methods comprising a change signal, the method comprising the steps of:

After sending the change signal to the at least one actuator:

The fan speed of the at least one actuator is varied.

The combustion device (1) preferably has an air supply channel which is in fluid connection with the combustion chamber (2). An air actuator (4) acts on this air supply channel. The combustion device (1) preferably has a fuel supply channel which is in fluid connection with the combustion chamber (2). Air actuators (7-9) act on this fuel supply passage.

The present disclosure also teaches a combustion apparatus (1) comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (19) in the combustion chamber (2) a temperature sensor (20), wherein the second temperature sensor (20) is different from the first temperature sensor (19); at least one supply passage in fluid connection with the combustion chamber (2); selected from the group consisting of an air actuator (4) and a fuel actuator At least one actuator of actuators (7-9), wherein the at least one actuator acts on the at least one supply channel, the combustion device (1) additionally comprises regulating and/or control means (13), the regulating and/or control means are connected in communication with the first temperature sensor ( 19 ), the second temperature sensor ( 20 ) and the at least one actuator, wherein the regulation and/or control means ( 13 ) are designed to perform the above one of the methods.

The present disclosure also teaches a combustion apparatus (1) comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (19) in the combustion chamber (2) A temperature sensor (20) and another temperature sensor in the combustion chamber (2), wherein the first temperature sensor (20), the second temperature sensor (19) and the further temperature sensor are different in pairs; 2) At least one supply channel fluidly connected; at least one actuator selected from the group consisting of an air actuator (4) and a fuel actuator (7-9), wherein the at least one actuator acts on the at least one supply channel , the combustion plant (1) additionally comprises a regulating and/or control device (13) which is associated with the first temperature sensor (19), the second temperature sensor (20), the further temperature A sensor is connected in communication with the at least one actuator, wherein the regulation and/or control device (13) is designed to perform one of the above-mentioned methods comprising another temperature sensor in the combustion chamber (2).

The present disclosure also teaches a combustion apparatus (1) comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (19) in the combustion chamber (2) a temperature sensor (20), wherein the second temperature sensor (20) is different from the first temperature sensor (19); at least one supply channel in fluid connection with the combustion chamber (2); in operative connection with the fluid in the at least one supply channel the supply signal device (4, 7-9, 12), wherein the supply signal device (4, 7-9, 12) is arranged outside the combustion chamber (2); selected from the air actuator (4) and the fuel actuator At least one actuator of actuators (7-9), wherein the at least one actuator acts on the at least one supply channel, the combustion device (1) additionally comprises regulating and/or control means (13), the regulating and/or control means are connected in communication with the first temperature sensor (19), the second temperature sensor (20), the supply signal means (4, 7-9, 12) and the at least one actuator, wherein the regulation And/or the control device (13) is designed to carry out one of the above-mentioned methods comprising supplying the signalling device (4, 7-9, 12).

The present disclosure also teaches a computer program product comprising instructions causing the combustion apparatus (1) to perform the method steps of one of the above methods.

The present disclosure also teaches a computer program product comprising instructions which cause the regulation and/or control device (13) of one of the above-mentioned combustion apparatuses (1) to perform the method steps of one of the above-mentioned methods.

The present disclosure also teaches a computer program comprising instructions that cause the regulation and/or control device (13) of one of the above-mentioned combustion plants (1) to perform the method steps of one of the above-mentioned methods.

The present disclosure also teaches a computer program product comprising instructions causing: one of the above-mentioned combustion apparatuses (1) to perform the method steps of one of the above-mentioned methods.

The present disclosure also teaches a computer program comprising instructions that cause one of the above-mentioned combustion apparatuses (1) to perform the method steps of one of the above-mentioned methods.

The present disclosure also teaches a computer-readable medium having one of the above-described computer programs stored thereon.

The present disclosure also teaches a computer-readable medium having one of the above-described computer program products stored thereon.

The aforementioned computer-readable medium is preferably tangible. Ideally, these computer-readable media are non-volatile.

The present disclosure also teaches a method for regulating a combustion device (1) comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a combustion chamber (2) a second temperature sensor (20) in the chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19); an air actuator (4) for generating an air supply (5); and At least one fuel actuator (7-9) for generating a fuel supply (6), the method comprising the steps of:

adjusting the at least one fuel actuator (7-9) and/or the air actuator (4);

recording the first signal of the first temperature sensor (19);

At least one first combustion power ( 23 ) is determined as a function of the first signal using a first characteristic curve ( 24 ), which specifies the combustion power ( 23 ) for the first temperature sensor ( 19 ) ) with the change process of the signal of the first temperature sensor (19);

recording the second signal of the second temperature sensor (20);

At least one second combustion power ( 23 ) is determined as a function of the second signal using a second characteristic curve ( 25 ), which specifies the combustion power ( 23 ) for the second temperature sensor ( 20 ) ) with the change process of the signal of the second temperature sensor (20);

determining the comparison value from the determined first combustion power (23) and from the determined second combustion power (23); and

The above steps are repeated until the determined comparison value is smaller than the predetermined threshold value.

The present disclosure also teaches a method for regulating a combustion device (1) comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a combustion chamber (2) a second temperature sensor (20) in the chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19); an air actuator (4) for generating an air supply (5); and At least one fuel actuator (7-9) for generating a fuel supply (6), the method comprising the steps of:

recording the first signal of the first temperature sensor (19);

At least one first combustion power ( 23 ) is determined as a function of the first signal using a first characteristic curve ( 24 ), which specifies the combustion power ( 23 ) for the first temperature sensor ( 19 ) ) with the change process of the signal of the first temperature sensor (19);

recording the second signal of the second temperature sensor (20);

At least one second combustion power ( 23 ) is determined as a function of the second signal using a second characteristic curve ( 25 ), which specifies the combustion power ( 23 ) for the second temperature sensor ( 20 ) ) with the change process of the signal of the second temperature sensor (20);

determining a comparison value from the determined first combustion power ( 23 ) and from the determined second combustion power ( 23 );

adjusting the at least one fuel actuator (7-9) and/or the air actuator (4) as a function of the comparison value; and

The above steps are repeated until the determined comparison value is smaller than the predetermined threshold value.

The present disclosure also teaches one of the above methods for regulating a combustion apparatus (1) comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor ( 20 ) in the combustion chamber ( 2 ), wherein the second temperature sensor ( 20 ) is different from the first temperature sensor ( 19 ); an air actuator ( 4 ) for generating the air supply ( 5 ) ); and at least one fuel actuator (7-9) for generating a fuel supply (6), the combustion device (1) additionally comprising at least one further temperature sensor in the combustion chamber (2), wherein the Another temperature sensor is different from the first temperature sensor (19) and also different from at least the second temperature sensor (20), the method comprising the steps of:

adjusting the at least one fuel actuator (7-9) and/or the air actuator (4);

In addition to recording the signals of the first and second temperature sensors (19, 20), recording another combustion signal of the other temperature sensor in the combustion chamber (2);

At least one other combustion power ( 23 ) is determined as a function of the further combustion signal using a further characteristic curve, which for the further sensor describes the variation of the combustion power ( 23 ) with the the change in the signal of the other sensor; and

determining a comparison value from the determined first combustion power ( 23 ) and from the determined second combustion power ( 23 ) and from the at least one other combustion power ( 23 ); and

The above steps are repeated until the determined comparison value is smaller than the predetermined threshold value.

The present disclosure also teaches one of the above methods for regulating a combustion apparatus (1) comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor ( 20 ) in the combustion chamber ( 2 ), wherein the second temperature sensor ( 20 ) is different from the first temperature sensor ( 19 ); an air actuator ( 4 ) for generating the air supply ( 5 ) ); and at least one fuel actuator (7-9) for generating a fuel supply (6), the combustion device (1) additionally comprising at least one further temperature sensor in the combustion chamber (2), wherein the Another temperature sensor is different from the first temperature sensor (19) and also different from at least the second temperature sensor (20), the method comprising the steps of:

In addition to recording the signals of the first and second temperature sensors (19, 20), recording another combustion signal of the other temperature sensor in the combustion chamber (2);

At least one other combustion power ( 23 ) is determined as a function of the further combustion signal using a further characteristic curve, which for the further sensor describes the variation of the combustion power ( 23 ) with the the change in the signal of the other sensor; and

determining a comparison value from the determined first combustion power ( 23 ) and from the determined second combustion power ( 23 ) and from the at least one other combustion power ( 23 );

adjusting the at least one fuel actuator (7-9) and/or the air actuator (4) as a function of the comparison value; and

The above steps are repeated until the determined comparison value is smaller than the predetermined threshold value.

The present disclosure teaches one of the above-mentioned methods for regulating a combustion device (1) including a comparison value calculated as a numerical value of the difference between the two determined combustion powers (23).

The present disclosure teaches one of the above methods for regulating a combustion device (1) including a comparison value calculated as the sum of the squared differences of all calculated combustion powers (23). and.

The present disclosure teaches one of the above-mentioned methods for regulating a combustion device (1), wherein the air actuator (4) and/or the at least one fuel actuator (7- 9) to derive the state of the air actuator and/or the fuel actuator.

Using the above disclosure, the air coefficient λ of the combustion device ( 1 ) is adjusted according to the air coefficient λ adjusted for the characteristic curves ( 24 , 25 ).

The present disclosure teaches one of the above methods, wherein the combustion power (23) of the combustion device (1) is calculated from the average of two combustion powers (23) according to the characteristic curves ( 24, 25) to be determined.

The present disclosure teaches one of the above methods, wherein the combustion power (23) of the combustion device (1) is determined according to the average of at least two combustion powers (23) determined from each characteristic curve (24, 25). calculate.

The present disclosure teaches one of the above methods, wherein one of the calculated combustion powers (23) is selected as the combustion power (23) of the combustion apparatus (1).

The present disclosure teaches one of the above methods, wherein the value of the difference between the calculated combustion power ( 23 ) of the combustion plant ( 1 ) and a predetermined target value is calculated.

The present disclosure teaches one of the above methods, wherein the air actuator (4) and the at least one fuel actuator (7-9) are adjusted such that the calculated combustion power (23) is the same as the predetermined one The value of the difference between the combustion powers ( 23 ) is below another, defined threshold.

Using the above disclosure, the determined combustion power ( 23 ) of the combustion plant ( 1 ) is adjusted to a predetermined target value.

The present disclosure teaches one of the above methods, the combustion apparatus (1) comprising an additional air supply sensor (12),

wherein a function of the feedback signal regarding the combustion power (23) of the combustion device (1) is registered for the air supply sensor (12); and

The function is corrected according to the currently determined combustion power ( 23 ).

The present disclosure teaches one of the above methods comprising an air supply sensor (12),

wherein the signal of the air supply sensor (12) is recorded;

wherein the correction of the function is made by a multiplication factor applied to each value of the registered function; and

The multiplication factor is determined from the quotient of the determined combustion power ( 23 ) and the function value calculated from the recorded measurement values.

The present disclosure teaches one of the above methods, wherein for rapid changes in combustion power (23), a function corrected by this multiplication factor is used for the air actuator (4).

The present disclosure teaches one of the above methods,

wherein for two fuels with different fuel parameters, a characteristic curve actuated by the fuel actuator and depending on the calculated combustion power (23) of the combustion device (1) is respectively registered;

wherein the weighting factor is calculated from the two registered characteristic curves and the actuated value derived from the determination of the state of the fuel actuator; and

A characteristic curve for adjusting the at least one fuel actuator ( 7 - 9 ) is calculated as a function of the weighting factor.

The present disclosure teaches one of the above-described methods including a weighting factor, wherein the weighting factor is a weighting factor for a weighted arithmetic mean according to the calculated combustion power ( 23 ) as a result of the averaging The state of the fuel actuator and the two registered characteristic curve values for the fuel actuator actuation at the calculated combustion power ( 23 ) as the value to be weighted are calculated.

The present disclosure teaches one of the above methods, wherein for the at least one fuel actuator (7-9) for rapid changes in combustion power (23) a combustion power (23) dependent on the combustion apparatus (1) is used ) of the calculated characteristic curve.

The present disclosure teaches one of the above methods involving fuel parameters, wherein two fuels and/or different compositions of fuel gas are used as two different fuel parameters.

The present disclosure teaches one of the above methods for two fuel parameters, wherein two different inlet pressures of fuel and/or fuel gas are used as the two different fuel parameters.

The present disclosure teaches one of the above methods wherein pure hydrogen or a mixture of a hydrocarbon-containing fuel gas and hydrogen is used as the fuel.

The present disclosure teaches one of the above methods, the combustion plant (1) additionally comprising at least two safety shut-off valves (7, 8) for interrupting the fuel supply (6) to the combustion chamber (2),

wherein at least two of the temperature sensors (19, 20) are used to monitor the flame in the combustion chamber (2);

wherein a flameout is detected when the predetermined signal associated with the sensors ( 19 , 20 ) falls below; and

At least one of these safety shut-off valves (7, 8) is then closed so that the fuel supply (6) is interrupted.

The present disclosure also teaches one of the above methods, the combustion plant (1) additionally comprising at least two safety shut-off valves (7, 8) for interrupting the fuel supply (6) to the combustion chamber (2),

wherein at least two of the temperature sensors (19, 20) are used to monitor the flame in the combustion chamber (2);

wherein the value of the difference between the signals of these temperature sensors (19, 20) is obtained according to at least two temperature sensors (19, 20);

wherein a flameout is identified when the value of the difference between the temperature values is below a threshold; and

At least one of these safety shut-off valves (7, 8) is then closed so that the fuel supply (6) is interrupted.

The premise of the present disclosure is that the two sensors ( 19 , 20 ) are positioned such that the two temperature values cannot take the same temperature value during operation in the presence of a flame in the combustion chamber ( 2 ), but come from the characteristic curve ( The combustion power (23) in 24, 25) can take the same value.

The cases mentioned relate to various embodiments of the present disclosure. Various modifications to these embodiments may be made without departing from the basic idea and without departing from the scope of protection of the present disclosure. The disclosed subject matter is defined by the claims hereof. Various modifications can be made without departing from the scope of protection of the following claims.

reference number

1: Combustion equipment

2: Combustion chamber

3: Burner

4: Fan

5: Air supply

6: Fuel supply

7: Safety shut-off valve

8: Safety shut-off valve

9: Fuel metering valve, especially fuel gas metering valve

10: Exhaust channel

11: Air supply signal

12: Air supply sensor, e.g. fan speed sensor

13: Regulation and/or Control Devices

14: Circuit for fan control signal

15: Lines for feedback of air supply, eg fan speed feedback

16: Line for the control signal of the safety shut-off valve

17: Line for the control signal of the safety shut-off valve

18: Line for the control signal of the fuel metering valve

19: The first sensor in the combustion chamber

20: The first sensor in the combustion chamber

21: Line for the measurement signal of the first sensor in the combustion chamber and the signal from this line

22: Line for the measurement signal of the second sensor in the combustion chamber and the signal from this line

23: Combustion power

24 : Characteristic curve of the combustion power as a function of the measured measurement signal of the first sensor in the combustion chamber

25: Characteristic curve of the combustion power as a function of the measured measurement signal of the second sensor in the combustion chamber

26 : Characteristic curve of the combustion power with a lean mixture as a function of the measurement signal measured by the first sensor in the combustion chamber

27 : Characteristic curve of the combustion power with a lean mixture as a function of the measurement signal measured by the second sensor in the combustion chamber

28: Characteristic curve of the air sensor signal for modulation before changing the exhaust path

29: Characteristic curve of the air sensor signal for modulation after changing the exhaust path

30: Fuel supply control characteristic by fuel actuation for high-calorie fuel, in particular high-calorie fuel gas and/or high inlet pressure

31: Fuel supply control characteristic by fuel actuation for low-calorie fuel, in particular low-calorie fuel gas and/or low inlet pressure

32: Characteristic curve for modulation, determined by the combustion device and adapted to the current fuel parameters and/or fuel gas parameters.

Claims (10)

1. A method for adjusting a combustion apparatus (1), the combustion apparatus (1) comprising a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (20) in the combustion chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19), the method comprising the steps of:

-recording a first signal of the first temperature sensor (19);

-recording a second signal of the second temperature sensor (20);

determining at least one first combustion power (23) as a function of the first signal using a first characteristic curve (24) which describes the course of the combustion power (23) as a function of the signal of the first temperature sensor (19) for the first temperature sensor (19);

determining at least one second combustion power (23) as a function of the second signal using a second characteristic curve (25) which describes the course of the combustion power (23) as a function of the signal of the second temperature sensor (20) for the second temperature sensor (20);

determining a current combustion power (23) of the combustion plant (1) as a function of the at least one first combustion power (23) and the at least one second combustion power (23); and also

Adjusting the current combustion power (23) of the combustion device (1) to a target power of the combustion device (1).

2. The method according to claim 1, the combustion device (1) additionally comprising at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), the adjusting of the present combustion power (23) of the combustion device (1) to the target power of the combustion device (1) comprising the steps of:

determining the difference between the current combustion power (23) of the combustion plant (1) and the target power of the combustion plant (1);

generating an actuator signal from the difference; and also

Sending the actuator signal to the at least one actuator.

3. The method according to any one of claims 1 to 2, comprising the steps of:

determining at least one third combustion power (23) as a function of the first signal using the first characteristic curve (24), wherein the first characteristic curve (24) assigns at least two different combustion powers (23) to the first signal, such that the at least one third combustion power (23) differs from the at least one first combustion power (23);

determining a first difference between the at least one first combustion power (23) and the at least one second combustion power (23);

determining a second difference between the at least one third combustion power (23) and the at least one second combustion power (23);

comparing the first difference to the second difference;

-selecting said at least one first combustion power (23) if said first difference is smaller than said second difference;

-selecting said at least one third combustion power (23) if said second difference is smaller than said first difference; and also

Determining a current combustion power (23) of the combustion device (1) as a function of the selected combustion power (23) and the at least one second combustion power (23).

4. The method according to claim 3, comprising the steps of:

determining a current combustion power (23) of the combustion device (1) as an arithmetic mean of the selected combustion power (23) and the at least one second combustion power (23).

5. The method according to any of claims 1 to 4, the combustion apparatus (1) additionally comprising a further sensor in the combustion chamber (2), wherein the further sensor in the combustion chamber (2) is different from the first temperature sensor (19) and different from the second temperature sensor (20), the method comprising the steps of:

recording another combustion signal of the another sensor;

determining at least one further combustion power (23) as a function of the further combustion signal using a further characteristic curve which specifies a course of the combustion power (23) for the further sensor as a function of the signal of the further sensor; and also

Determining a current combustion power (23) of the combustion device (1) as a function of the at least one first combustion power (23) and the at least one second combustion power (23) and the at least one further combustion power (23).

6. The method according to any one of claims 1 to 5, the combustion apparatus (1) additionally comprising at least one supply channel in fluid connection with the combustion chamber (2), a supply signal device (4, 7-9, 12) in operative connection with a fluid in the at least one supply channel, wherein the supply signal device (4, 7-9, 12) is arranged outside the combustion chamber (2), the method comprising the steps of:

-recording the supply signal of said supply signal device (4, 7-9, 12);

determining a supply-based combustion power (23) as a function of the supply signal using a supply-based characteristic curve which describes a course of the combustion power (23) as a function of the signal of the supply signal device (4, 7-9, 12) for the supply signal device (4, 7-9, 12); and also

Determining a current combustion power (23) of the combustion device (1) as a function of the at least one first combustion power (23) and the at least one second combustion power (23) and the supply-based combustion power (23).

7. The method according to any of claims 1 to 6, the combustion device (1) additionally comprising at least one actuator selected from an air actuator (4) and a fuel actuator (7-9), the method comprising the steps of:

sending a change signal to the at least one actuator;

after sending the change signal to the at least one actuator:

-recording a third signal of the first temperature sensor (19),

-recording a fourth signal of the second temperature sensor (20),

determining at least one third combustion power (23) as a function of the third signal using the first characteristic curve (24);

determining at least one fourth combustion power (23) as a function of the fourth signal using the second characteristic curve (25); and also

Determining a current combustion power (23) of the combustion device (1) as a function of the at least one first combustion power (23), the at least one second combustion power (23), the at least one third combustion power (23) and the at least one fourth combustion power (23).

8. A combustion apparatus (1), comprising: a combustion chamber (2) and a first temperature sensor (19) in the combustion chamber (2) and a second temperature sensor (20) in the combustion chamber (2), wherein the second temperature sensor (20) is different from the first temperature sensor (19); at least one supply channel in fluid connection with the combustion chamber (2); at least one actuator selected from the group consisting of an air actuator (4) and a fuel actuator (7-9), wherein the at least one actuator acts on the at least one supply channel, the combustion device (1) additionally comprising a regulating and/or control means (13) which is in communicative connection with the first temperature sensor (19), the second temperature sensor (20) and the at least one actuator, wherein the regulating and/or control means (13) is designed for carrying out the method according to any one of claims 1 to 7.

9. A computer program product comprising instructions that cause: the combustion apparatus (1) of claim 8 performs the method steps according to any one of claims 1 to 7.

10. A computer readable medium having stored thereon the computer program product of claim 9.

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