CN111721033A - Distributed heat pump management and control system - Google Patents
Distributed heat pump management and control system Download PDFInfo
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- CN111721033A CN111721033A CN202010495140.6A CN202010495140A CN111721033A CN 111721033 A CN111721033 A CN 111721033A CN 202010495140 A CN202010495140 A CN 202010495140A CN 111721033 A CN111721033 A CN 111721033A
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- 238000007726 management method Methods 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000835 fiber Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 7
- 229920000271 Kevlar® Polymers 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 6
- 239000004761 kevlar Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 5
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- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
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- 238000009529 body temperature measurement Methods 0.000 description 3
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
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- 239000000377 silicon dioxide Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/05—Cost reduction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
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- Physics & Mathematics (AREA)
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- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a distributed heat pump management and control system, which comprises a heat pump controller, a data communication module and a monitoring center, wherein the heat pump controller is connected with the data communication module; the heat pump controller is directly connected with various temperature measuring devices arranged on the heat pump unit, and performs parameter acquisition and control output of the whole heat pump unit; the data communication system is used for realizing remote transmission of the heat pump operation data; the monitoring center displays the data returned from the heat pump controller in real time on one hand, and sends a control instruction to the heat pump controller through the data communication system on the other hand. The invention can reduce the operation and maintenance cost of the heat pump, has the advantages of high measurement stability, uniform test, simple wiring, strong anti-interference capability and better practical value.
Description
Technical Field
The invention relates to the technical field of distributed temperature measurement, in particular to a distributed heat pump management and control system.
Background
Heat pumps have received a lot of attention since their entry into china. Although the basic investment of the heat pump unit is relatively large in the early stage, the advantages of the heat pump unit are mainly reflected in the later stage operation cost. The heat pump obtains energy which is several times of electric energy from the surrounding environment on the premise of consuming a little electric energy per se, and the resource utilization maximization is realized.
Different faults of the heat pump can be caused in the working engineering due to the different working environments of the heat pump units, the faults need to be clearly and timely fed back by users, but the users are not heat pump professionals and cannot clearly describe the fault reasons of the heat pump in the operation process, and company engineers need to be sent to the heat pump site to check, so that the time cost is increased, and the use experience of the users is also influenced. Regarding the heat pump unit control mode, if the wired transmission mode is adopted, the complexity and the cost of wiring need to be considered in the whole system, and in addition, the traditional temperature sensor is easy to age, poor in data precision, not easy to construct and large in noise-resistant error. Therefore, how to reduce the operation and maintenance cost of the heat pump, and simultaneously, the real-time and accurate collected operation data provides data support and experience reserve for the development of the heat pump becomes a problem which needs to be solved urgently.
Disclosure of Invention
The invention aims to provide a distributed heat pump management and control system to solve the technical problems of inaccurate data acquisition and inaccurate control in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme: a distributed heat pump management and control system comprises a heat pump controller, a data communication module and a monitoring center;
the heat pump controller is directly connected with various temperature measuring devices arranged on the heat pump unit, and performs parameter acquisition and control output of the whole heat pump unit;
the data communication system is used for realizing remote transmission of the heat pump operation data;
the monitoring center displays the data returned from the heat pump controller in real time on one hand, and sends a control instruction to the heat pump controller through a data communication system on the other hand;
the temperature measuring device comprises an optical fiber temperature measuring module and a signal processing module, wherein the optical fiber temperature measuring module comprises a laser module, a wavelength division multiplexer and a photoelectric converter, the laser module comprises a laser light source and a laser driving module, the laser light source is provided with matched sensing optical fibers, and the sensing optical fibers are laid at corresponding positions of the heat pump unit through preset pipelines and used for sensing the temperature of the heat pump unit and transmitting optical signals carrying the temperature back;
the wavelength division multiplexer is used for transmitting an optical signal of the laser light source to the sensing optical fiber and filtering a returned optical wave, and comprises a bidirectional coupler, an optical filter and a parallel optical path;
the photoelectric converter is used for converting the detected optical signal into an electrical signal, and comprises: the photoelectric detector, the signal amplification circuit and the temperature control circuit;
the signal processing module is used for collecting weak current signals at a high speed, analyzing the electric signals converted by the photoelectric converter to obtain the continuous temperature on the length of the sensing optical fiber, and taking data storage and data transmission functions into consideration.
Preferably, the sensing optical fiber comprises a fiber core, the fiber core is wrapped by a glass cladding, the periphery of the glass cladding is wrapped by a threaded pipe, the threaded pipe is wrapped by Kevlar, the periphery of the Kevlar is wrapped by a woven mesh, and the periphery of the woven mesh is wrapped by a sheath.
The distributed heat pump management and control system according to claim 1, wherein: the temperature measuring device is used for measuring temperature parameters of a heat pump unit terminal, and comprises the suction and exhaust temperature of a compressor, the temperature of inlet and outlet water of an evaporator, the temperature of inlet water of a condenser and the temperature and humidity of the environment.
Preferably, the heat pump controller is internally provided with an intelligent PID controller, uncertainty is reduced by adopting a feedback closed-loop automatic control technology, the actual value of the measured controlled temperature variable is read and compared with a user set value, the deviation of the measured controlled temperature variable and the user set value is calculated to correct the response of the system, and meanwhile, a flow control valve arranged in the heat pump unit is controlled to realize control on cold water flow and hot water flow.
Preferably, the threaded pipe and the woven net are made of stainless steel materials respectively, and the sheath is made of polyvinyl chloride materials.
Preferably, the sensing fiber, when deployed, performs the following operations:
and respectively connecting the head end and the tail end of the sensing optical fiber to an Nth channel of an optical switch in the wavelength-light multiplexer, and acquiring the difference of the two paths of attenuation coefficients in each temperature measuring optical cable according to the intensity of anti-Stokes and Stokes light at a preset position when the sensing optical fiber is injected from the head part of the sensing optical fiber and the intensity of anti-Stokes and Stokes light at the preset position when the temperature measuring optical fiber is injected from the tail part of the temperature measuring optical fiber.
Preferably, the above operations further comprise:
setting a reference optical fiber and a calibration optical fiber, connecting one end of the reference optical fiber with a No. 1 optical switch in a wavelength optical multiplexer, connecting one end of the calibration optical fiber with a No. 2 optical switch in the wavelength optical multiplexer, and connecting the other end of the calibration optical fiber with a sensing optical fiber, wherein the No. 1 optical switch and the No. 2 optical switch both comprise an input port and N output ports, and welding the No. 1 optical switch and the No. 2 optical switch in a 1-to-N-1 output port pairing mode to form a 1-to-N-1 channel, wherein N is not less than 4, and calculating the optical fiber length difference between the No. 1 optical switch and the No. 2 optical switch in a 1-to-N-1 output port simultaneously, specifically comprising:
substituting the vacuum light speed c0, the FS sampling frequency and the R optical fiber refractive index into a formula
Preferably, the operations further comprise:
setting an initial loss value L, an initial loss compensation step S and an average temperature maximum offset absolute value MP, demodulating to obtain temperature distribution data of each point of the calibration optical fiber, obtaining an average temperature T between a starting position Ps and an ending position Pe of the calibration optical fiber, calculating a temperature offset P according to the average temperature T, and ending the calibration of the loss coefficient when | P | < MP.
Preferably, the above operations further comprise:
and switching the No. 1 optical switch and the No. 2 optical switch to the mth channel at the same time, calculating the temperature, and storing the data of the mth channel in the corresponding position of the storage area.
Preferably, the acquiring of the difference between the two paths of attenuation coefficients in each temperature measuring optical cable specifically includes:
according to
Acquiring the difference of two paths of attenuation coefficients in each temperature measuring optical fiber;
wherein LNf(X)For the signal ratio at position X when light is injected from the head of the temperature measuring optical fiber, specifically
wherein LNb(X)For the signal ratio at position X when light is injected from the head of the temperature measuring optical fiber, specifically
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a distributed heat pump management and control system aiming at the problems of the current heat pump market, particularly in the operation in the industrial field, the system not only reduces the control and reduces the cost, but also has the remote control capability, and the system has the advantages of long control distance, good reliability and certain expansibility;
the temperature measuring device provided by the invention utilizes the transmission characteristic of light waves in the optical fiber to detect the temperature change at different positions along the optical fiber, and the optical fiber is a sensing medium and a transmission medium, so that the system stability is high, the test is uniform and the wiring is simple, and the interference of external factors is avoided;
the invention improves the sampling rate of the distributed temperature measurement system by a multi-path time delay acquisition mode, thereby improving the spatial distribution rate of the system, improving the positioning precision of the distributed temperature measurement system on the premise of not changing the pulse width of a laser and the sampling rate of the system, and having practical significance.
Drawings
Fig. 1 is a schematic structural diagram of a distributed heat pump management and control system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that certain names are used throughout the specification and claims to refer to particular components. It will be understood that one of ordinary skill in the art may refer to the same component by different names. The present specification and claims do not intend to distinguish between components that differ in name but not function. As used in the specification and claims of this application, the terms "comprises" and "comprising" are intended to be open-ended terms that should be interpreted as "including, but not limited to," or "including, but not limited to. The embodiments described in the detailed description are preferred embodiments of the present invention and are not intended to limit the scope of the present invention.
Moreover, those skilled in the art will appreciate that aspects of the present invention may be embodied as a system, method or computer program product. Accordingly, various aspects of the present invention may be embodied in a combination of hardware and software, which may be referred to herein generally as a "circuit," module "or" system. Furthermore, in some embodiments, various aspects of the invention may also be embodied in the form of a computer program product in one or more microcontroller-readable media having microcontroller-readable program code embodied therein.
Example 1
The embodiment provides a distributed heat pump management and control system, which comprises a heat pump controller, a data communication module and a monitoring center;
the heat pump controller is directly connected with various temperature measuring devices arranged on the heat pump unit, and performs parameter acquisition and control output of the whole heat pump unit;
the data communication system is used for realizing remote transmission of the heat pump operation data; the monitoring system is divided into a wired transmission mode and a wireless transmission mode due to the mode of data transmission. The wired transmission system has a disadvantage of being complicated in wiring and high in cost, and thus gradually fades out of the field of vision of people. The wireless transmission mode is the mainstream mode by virtue of the advantages of convenient installation, strong flexibility and high cost performance. Common wireless communication includes WIFI, bluetooth, GSM, RF radio frequency, etc., and the WIFI communication mode becomes the choice of short-distance communication due to its characteristics of wide coverage area and strong mobility. RF radio frequencies are limited due to their communication distance. The GSM network communication mode, which adopts the flow charging mode, has great advantages for the industrial field with small data transmission requirements. Because heat pump terminal equipment distributes widely, transmission data volume is little, this system uses the STM32 chip as the owner processor, and ESP32 chip is the coprocessor, connects E5573s network box, uploads heat pump operation data to the cloud ware through WIFI, realizes the data sharing in high in the clouds
The monitoring center displays the data returned from the heat pump controller in real time on one hand, and sends a control instruction to the heat pump controller through a data communication system on the other hand; the monitoring center is mainly designed by a user side (upper computer software) and a mobile phone side page. The upper computer software is an interface between a user and the monitoring system, on one hand, the return data from the heat pump controller is displayed in real time, and on the other hand, the control instruction is sent to the heat pump controller through the wireless communication system. The upper computer page design tends to be humanized and the operation is simplified. The cloud server is mainly used for storing running data of each path of sensor monitoring heat pump unit and has the functions of uploading and issuing.
The temperature measuring device comprises an optical fiber temperature measuring module and a signal processing module, wherein the optical fiber temperature measuring module comprises a laser module, a wavelength division multiplexer and a photoelectric converter, the laser module comprises a laser light source and a laser driving module, the laser light source is provided with matched sensing optical fibers, and the sensing optical fibers are laid at corresponding positions of the heat pump unit through preset pipelines and used for sensing the temperature of the heat pump unit and transmitting optical signals carrying the temperature back;
the wavelength division multiplexer is used for transmitting an optical signal of the laser light source to the sensing optical fiber and filtering a returned optical wave, and comprises a bidirectional coupler, an optical filter and a parallel optical path;
the photoelectric converter is used for converting the detected optical signal into an electrical signal, and comprises: the photoelectric detector, the signal amplification circuit and the temperature control circuit;
the signal processing module is used for collecting weak current signals at a high speed, analyzing the electric signals converted by the photoelectric converter to obtain the continuous temperature on the length of the sensing optical fiber, and taking data storage and data transmission functions into consideration.
The sensing optical fiber in the embodiment comprises a fiber core, wherein the fiber core is wrapped by a glass wrapping layer, the periphery of the glass wrapping layer is wrapped by a threaded pipe, the threaded pipe is wrapped by Kevlar, the periphery of the Kevlar is wrapped by a woven mesh, and the periphery of the woven mesh is wrapped by a sheath.
The adoption of the distributed sensing optical fiber has the following advantages:
the main material of the optical fiber is silicon dioxide, the main component of the optical fiber is intrinsically safe, the melting point is 1650 +/-50 ℃, the optical fiber is resistant to high temperature, light waves are transmitted by the optical fiber, the optical fiber is irrelevant to electricity, the electromagnetic interference does not exist, and the optical fiber has the characteristics of lightning protection, water resistance, moisture resistance and the like. The measuring distance is wide and the cost is low. The whole optical fiber in the distributed optical fiber temperature sensing system is used as a temperature measuring point, and the temperature of tens of thousands of measuring points can be measured by one optical fiber at one time, so that the cost is greatly reduced compared with the single-point measurement of a common temperature sensor. Small volume, light weight and strong plasticity. The optical fiber is a temperature sensing part of the sensor, is small in size and light in weight, can be bent to a certain degree, can change the trend along with the shape of a measured object, can adapt to the measured environment to the maximum extent, can be buried in a composite material, can be pasted on the surface of the material, has high compatibility with the material to be measured, is good in real-time performance and high in sensitivity, is high in optical fiber propagation light wave speed and temperature sensitivity, can transmit temperature data in real time, and can well meet the requirements of a monitoring system requiring rapid detection.
The temperature measuring device in the embodiment is used for measuring temperature parameters of a heat pump unit terminal, and comprises the air suction and exhaust temperature of a compressor, the temperature of inlet and outlet water of an evaporator, the temperature of inlet water of a condenser and the temperature and humidity of the environment.
The heat pump controller in this embodiment is provided with an intelligent PID controller inside, and the feedback closed-loop automatic control technique is used to reduce uncertainty, and the actual value of the measured controlled temperature variable is read and compared with the user set value, and the deviation between the actual value and the user set value is calculated to correct the response of the system, and at the same time, the flow control valve provided in the heat pump unit is controlled to realize the control of cold water flow and hot water flow.
The screwed pipe and the woven net in the embodiment are respectively made of stainless steel, and the sheath is made of polyvinyl chloride.
The sensing fiber in this embodiment performs the following operations when arranged:
and respectively connecting the head end and the tail end of the sensing optical fiber to an Nth channel of an optical switch in the wavelength-light multiplexer, and acquiring the difference of the two paths of attenuation coefficients in each temperature measuring optical cable according to the intensity of anti-Stokes and Stokes light at a preset position when the sensing optical fiber is injected from the head part of the sensing optical fiber and the intensity of anti-Stokes and Stokes light at the preset position when the temperature measuring optical fiber is injected from the tail part of the temperature measuring optical fiber.
The operations in this embodiment further include:
setting a reference optical fiber and a calibration optical fiber, connecting one end of the reference optical fiber with a No. 1 optical switch in a wavelength optical multiplexer, connecting one end of the calibration optical fiber with a No. 2 optical switch in the wavelength optical multiplexer, and connecting the other end of the calibration optical fiber with a sensing optical fiber, wherein the No. 1 optical switch and the No. 2 optical switch both comprise an input port and N output ports, and welding the No. 1 optical switch and the No. 2 optical switch in a 1-to-N-1 output port pairing mode to form a 1-to-N-1 channel, wherein N is not less than 4, and calculating the optical fiber length difference between the No. 1 optical switch and the No. 2 optical switch in a 1-to-N-1 output port simultaneously, specifically comprising:
substituting the vacuum light speed c0, the FS sampling frequency and the R optical fiber refractive index into a formula
The distributed heat pump management and control system according to claim 7, wherein: the operations further include:
setting an initial loss value L, an initial loss compensation step S and an average temperature maximum offset absolute value MP, demodulating to obtain temperature distribution data of each point of the calibration optical fiber, obtaining an average temperature T between a starting position Ps and an ending position Pe of the calibration optical fiber, calculating a temperature offset P according to the average temperature T, and ending the calibration of the loss coefficient when | P | < MP.
The above operations in this embodiment further include:
and switching the No. 1 optical switch and the No. 2 optical switch to the mth channel at the same time, calculating the temperature, and storing the data of the mth channel in the corresponding position of the storage area.
In this embodiment, obtaining the difference between the two paths of attenuation coefficients in each temperature measuring optical cable specifically includes:
according to
Acquiring the difference of two paths of attenuation coefficients in each temperature measuring optical fiber;
wherein LNf(X)For the position of light when the light is injected from the head of the temperature measuring optical fiberThe ratio of the signals at X, in particular
wherein LNb(X)For the signal ratio at position X when light is injected from the head of the temperature measuring optical fiber, specifically
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A distributed heat pump management and control system is characterized by comprising a heat pump controller, a temperature measuring device, a data communication module and a monitoring center;
the heat pump controller is directly connected with various temperature measuring devices arranged on the heat pump unit, and performs parameter acquisition and control output of the whole heat pump unit;
the data communication system is used for realizing remote transmission of the heat pump operation data;
the monitoring center displays the data returned from the heat pump controller in real time on one hand, and sends a control instruction to the heat pump controller through a data communication system on the other hand;
the temperature measuring device comprises an optical fiber temperature measuring module and a signal processing module, wherein the optical fiber temperature measuring module comprises a laser module, a wavelength division multiplexer and a photoelectric converter, the laser module comprises a laser light source and a laser driving module, the laser light source is provided with matched sensing optical fibers, and the sensing optical fibers are laid at corresponding positions of the heat pump unit through preset pipelines and used for sensing the temperature of the heat pump unit and transmitting optical signals carrying the temperature back;
the wavelength division multiplexer is used for transmitting an optical signal of the laser light source to the sensing optical fiber and filtering a returned optical wave, and comprises a bidirectional coupler, an optical filter and a parallel optical path;
the photoelectric converter is used for converting the detected optical signal into an electrical signal, and comprises: the photoelectric detector, the signal amplification circuit and the temperature control circuit;
the signal processing module is used for collecting weak current signals at a high speed, analyzing the electric signals converted by the photoelectric converter to obtain the continuous temperature on the length of the sensing optical fiber, and taking data storage and data transmission functions into consideration.
2. The distributed heat pump management and control system according to claim 1, wherein: the sensing optical fiber comprises a fiber core, the fiber core is wrapped by a glass wrapping layer, the periphery of the glass wrapping layer is wrapped by a threaded pipe, the threaded pipe is wrapped by Kevlar, the periphery of the Kevlar is wrapped by a woven mesh, and the periphery of the woven mesh is wrapped by a sheath.
3. The distributed heat pump management and control system according to claim 1, wherein: the temperature measuring device is used for measuring temperature parameters of a heat pump unit terminal, and comprises the suction and exhaust temperature of a compressor, the temperature of inlet and outlet water of an evaporator, the temperature of inlet water of a condenser and the temperature and humidity of the environment.
4. The distributed heat pump management and control system according to claim 1, wherein: the intelligent PID controller is arranged in the heat pump controller, uncertainty is reduced by adopting a feedback closed-loop automatic control technology, the actual value of the measured controlled temperature variable is read and compared with a user set value, the deviation of the measured controlled temperature variable and the user set value is calculated to correct the response of the system, and meanwhile, a flow control valve arranged in the heat pump unit is controlled to realize control of cold water flow and hot water flow.
5. The distributed heat pump management and control system according to claim 2, wherein: the screwed pipe and the woven net are made of stainless steel materials respectively, and the sheath is made of polyvinyl chloride materials.
6. The distributed heat pump management and control system according to claim 2, wherein: the sensing fiber, when deployed, performs the following operations:
and respectively connecting the head end and the tail end of the sensing optical fiber to an Nth channel of an optical switch in the wavelength-light multiplexer, and acquiring the difference of the two paths of attenuation coefficients in each temperature measuring optical cable according to the intensity of anti-Stokes and Stokes light at a preset position when the sensing optical fiber is injected from the head part of the sensing optical fiber and the intensity of anti-Stokes and Stokes light at the preset position when the temperature measuring optical fiber is injected from the tail part of the temperature measuring optical fiber.
7. The distributed heat pump management and control system according to claim 6, wherein: the operations further include:
setting a reference optical fiber and a calibration optical fiber, connecting one end of the reference optical fiber with a No. 1 optical switch in a wavelength optical multiplexer, connecting one end of the calibration optical fiber with a No. 2 optical switch in the wavelength optical multiplexer, and connecting the other end of the calibration optical fiber with a sensing optical fiber, wherein the No. 1 optical switch and the No. 2 optical switch both comprise an input port and N output ports, and welding the No. 1 optical switch and the No. 2 optical switch in a 1-to-N-1 output port pairing mode to form a 1-to-N-1 channel, wherein N is not less than 4, and calculating the optical fiber length difference between the No. 1 optical switch and the No. 2 optical switch in a 1-to-N-1 output port simultaneously, specifically comprising:
substituting the vacuum light speed c0, the FS sampling frequency and the R optical fiber refractive index into a formula
8. The distributed heat pump management and control system according to claim 7, wherein: the operations further include:
setting an initial loss value L, an initial loss compensation step S and an average temperature maximum offset absolute value MP, demodulating to obtain temperature distribution data of each point of the calibration optical fiber, obtaining an average temperature T between a starting position Ps and an ending position Pe of the calibration optical fiber, calculating a temperature offset P according to the average temperature T, and ending the calibration of the loss coefficient when | P | < MP.
9. The distributed heat pump management and control system according to claim 6, wherein: the operations further include:
and switching the No. 1 optical switch and the No. 2 optical switch to the mth channel at the same time, calculating the temperature, and storing the data of the mth channel in the corresponding position of the storage area.
10. The distributed heat pump management and control system of claim 8, wherein: the step of obtaining the difference of the two paths of attenuation coefficients in each temperature measuring optical cable specifically comprises the following steps:
according to
Acquiring the difference of two paths of attenuation coefficients in each temperature measuring optical fiber;
wherein LNf(X)For the signal ratio at position X when light is injected from the head of the temperature measuring optical fiber, specifically
Wherein N isar(Tx)、Nsf(Tx) The intensity of anti-Stokes light and Stokes light at the position X when the light is injected from the head part of the temperature measuring optical fiber;
wherein LNb(X)For the signal ratio at position X when light is injected from the head of the temperature measuring optical fiber, specifically
Wherein N isab(Tx)、Nsb(Tx) Is the intensity of the anti-stokes and stokes light at position X when injected from the temperature measuring fiber tip.
Priority Applications (1)
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| DE3910720A1 (en) * | 1989-04-03 | 1990-10-11 | Siemens Ag | REDUCING NOISE FROM LASER TRANSMITTERS |
| US6055815A (en) * | 1998-10-30 | 2000-05-02 | Litton Systems, Inc. | Temperature-controlled microchip laser assembly and associated submount assembly |
| CN202101419U (en) * | 2011-06-10 | 2012-01-04 | 江苏天舒电器有限公司 | Remote monitoring heat pump water heater unit system |
| CN209495787U (en) * | 2018-12-31 | 2019-10-15 | 湖北风神净化空调设备工程有限公司 | A kind of distributed temperature measuring device for soil source heat pump |
| CN110907062A (en) * | 2019-12-11 | 2020-03-24 | 山东省科学院激光研究所 | Method and system for improving sampling rate of distributed temperature measurement system |
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| DE3910720A1 (en) * | 1989-04-03 | 1990-10-11 | Siemens Ag | REDUCING NOISE FROM LASER TRANSMITTERS |
| US6055815A (en) * | 1998-10-30 | 2000-05-02 | Litton Systems, Inc. | Temperature-controlled microchip laser assembly and associated submount assembly |
| CN202101419U (en) * | 2011-06-10 | 2012-01-04 | 江苏天舒电器有限公司 | Remote monitoring heat pump water heater unit system |
| CN209495787U (en) * | 2018-12-31 | 2019-10-15 | 湖北风神净化空调设备工程有限公司 | A kind of distributed temperature measuring device for soil source heat pump |
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Application publication date: 20200929 |