CN112345282B - Determine the heat dissipation efficiency method and device - Google Patents

Abstract

The application discloses a method and a device for determining heat dissipation efficiency. Wherein, the method comprises the following steps: acquiring electric power of heating equipment; determining the heating capacity of heating equipment according to the refrigerating capacity of a refrigerating unit, wherein the heating equipment and the refrigerating unit are positioned in the same temperature control room; the heat dissipation efficiency of the heating equipment is determined according to the heating quantity and the electric power. The technical problem that in the related art, the calculation result caused by the fact that the heat dissipation efficiency can only be calculated by means of the factory nameplate parameters of the heating equipment is inaccurate, and the heating quantity of the heating equipment cannot be directly measured is solved.

Description

Determine the heat dissipation efficiency method and device

technical field

The present application relates to the field of measuring heating capacity, in particular, to a method and device for determining heat dissipation efficiency.

Background technique

Most existing heating equipment, such as direct-heating electric heating equipment such as resistance wire, cannot directly measure its heating capacity, and can only refer to the parameters on the factory nameplate, which not only cannot judge whether it meets the design standards, but also cannot provide accurate data for heating experiments. Data support, such as determining the cooling efficiency of heating equipment. Therefore, there is an urgent need for a method for heating the heating capacity of heating equipment.

For the above problems, no effective solution has been proposed yet.

Contents of the invention

The embodiment of the present application provides a method and device for determining heat dissipation efficiency to at least solve the inaccurate calculation results caused by the calculation of heat dissipation efficiency based on the factory nameplate parameters of the heating equipment in the related art, and the inability to directly measure the heating equipment Technical issues of heating capacity.

According to an aspect of an embodiment of the present application, a method for determining heat dissipation efficiency is provided, including: obtaining the electric power of the heating equipment; determining the heating capacity of the heating equipment according to the cooling capacity of the refrigeration unit, wherein the heating equipment and the refrigeration unit Located in the same control room; determine the heat dissipation efficiency of the heating equipment according to the heating capacity and electric power.

Optionally, before determining the heating capacity of the heating device according to the cooling capacity of the refrigeration unit, it includes: adjusting the regulating valve of the refrigeration unit according to the first preset step, the regulating valve is used to control the cold source flow of the refrigeration unit, the cold source flow Including: cold source water outlet and cold source water inlet; detecting the temperature change of the cold source water outlet, when the temperature change is greater than the first threshold, continue to adjust the regulating valve according to the first preset step; when the temperature change is less than the first threshold When a threshold value is reached, the regulating valve of the refrigeration unit is adjusted according to a second preset step size until the temperature change is zero, wherein the first preset step size is greater than the second preset step size.

Optionally, determining the heating capacity of the heating device according to the cooling capacity of the refrigeration unit includes: taking the heat absorbed by the flow of the corresponding cold source when the temperature change of the cold source outlet water is zero as the cooling capacity of the refrigeration unit; The cooling capacity determines the heating capacity of the heating equipment.

Optionally, the heat absorbed by the flow of the corresponding cold source when the temperature change of the water outlet from the cold source is zero is used as the heating capacity of the heating device, including: determining the specific heat capacity of the cold source; detecting the temperature of the water entering and leaving the cold source and the volume of the cold source Flow rate; determine the density of the cold source when the temperature change of the outlet water of the cold source is zero; determine the heat absorption power of the cold source flow according to the specific heat capacity, the temperature of the inlet and outlet water, the volume capacity and the density of the cold source.

Optionally, determining the heat absorption power of the cold source flow according to the specific heat capacity, the inlet and outlet water temperature, the volume capacity and the density of the cold source includes: determining the heat absorption power of the cold source flow through the following formula, the formula is: Q=C×ρV _m (T ₁ -T ₂ ); among them, Q represents the heat absorption power of the cold source flow, the unit is kW, C represents the specific heat capacity of the cold source at the average temperature, and the unit is kJ/(kg·K), T ₁ represents the temperature of the cold source water , the unit is ℃, T ₂ represents the temperature of the cold source inlet water, the unit is ℃, V _m represents the volume flow rate of the cold source, the unit is m3/s; ρ represents the liquid density of the cold source, the unit is kg/m ³ .

Optionally, determining the heating capacity of the heating equipment according to the cooling capacity of the refrigeration unit includes: receiving a startup instruction, wherein the startup instruction is used to simultaneously start the refrigeration unit and the heating equipment; in response to the startup instruction, determining the refrigeration unit and the heating When the equipment starts at the same time, the heating capacity of the heating equipment is determined according to the cooling capacity of the refrigeration unit.

Optionally, the control chamber is located in the enthalpy difference chamber, and the enthalpy difference chamber is used to provide power for the control chamber.

According to an aspect of the embodiments of the present application, there is also provided a device for determining heat dissipation efficiency, including: an acquisition module, configured to acquire the electric power of the heating equipment; a first determination module, configured to determine the heating efficiency according to the cooling capacity of the refrigeration unit The heating capacity of the equipment, wherein the heating equipment and the refrigeration unit are located in the same control room; the second determination module is used to determine the heat dissipation efficiency of the heating equipment according to the heating capacity and electric power.

According to another aspect of the embodiment of the present application, there is also provided a non-volatile storage medium, the non-volatile storage medium includes a stored program, wherein, when the program is running, the device where the non-volatile storage medium is located is controlled to execute any A method of determining cooling efficiency.

According to another aspect of the embodiments of the present application, a processor is also provided, and the processor is configured to run a program stored in a memory, wherein, when the program is running, any method for determining heat dissipation efficiency is executed.

In the embodiment of this application, the method of measuring the cooling capacity of the refrigeration unit is adopted. By placing the heating equipment to be measured and the refrigeration unit in the same laboratory, the cooling capacity of the refrigeration unit when the indoor temperature is constant is used as the cooling capacity of the heating equipment to be measured. The heating capacity achieves the purpose of measuring the heating capacity of the heating equipment, thereby realizing the technical effect of determining the heat dissipation efficiency according to the cooling capacity and the power consumption of the heating equipment to be measured, and then solving the problem that the related technology can only rely on the heating equipment The calculation results of heat dissipation efficiency caused by the factory nameplate parameters are inaccurate, and the heating capacity of heating equipment cannot be directly measured.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:

FIG. 1 is a schematic flowchart of an optional method for determining heat dissipation efficiency according to an embodiment of the present application;

Fig. 2 is a schematic structural diagram of an optional device for determining heat dissipation efficiency according to an embodiment of the present application.

detailed description

In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

According to an embodiment of the present application, an embodiment of a method for determining heat dissipation efficiency is provided. It should be noted that the steps shown in the flow chart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and, Although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

Fig. 1 is a method for determining heat dissipation efficiency according to an embodiment of the present application. As shown in Fig. 1, the method includes the following steps:

Step S102, obtaining the electric power of the heating equipment;

Step S104, determining the heating capacity of the heating equipment according to the cooling capacity of the refrigeration unit, wherein the heating equipment and the refrigeration unit are located in the same control room;

Step S106, determining the heat dissipation efficiency of the heating device according to the heating capacity and the electric power.

In the method for determining heat dissipation efficiency, first, the electric power of the heating equipment can be obtained; then the heating capacity of the heating equipment can be determined according to the cooling capacity of the refrigeration unit, wherein the heating equipment and the refrigeration unit are located in the same control room; finally, according to The heating capacity and electric power determine the heat dissipation efficiency of the heating equipment, which achieves the purpose of measuring the heating capacity of the heating equipment, thereby realizing the technical effect of determining the heat dissipation efficiency according to the cooling capacity and the power consumption of the heating equipment to be measured, and then solving the problem In the related art, the heat dissipation efficiency can only be calculated by relying on the factory nameplate parameters of the heating equipment, resulting in inaccurate calculation results, and the technical problem that the heating capacity of the heating equipment cannot be directly measured.

It should be noted that the above-mentioned heating equipment is equipment that converts electrical energy into heat energy. The heating equipment includes but is not limited to: electric heating equipment, electric heaters, etc. The above-mentioned electric power is the electric power of the heating equipment. It can also be determined according to the power meter, voltmeter and ammeter.

In some optional embodiments of the present application, before determining the heating capacity of the heating equipment according to the cooling capacity of the refrigeration unit, the cooling capacity of the refrigeration unit may be adjusted by the following method: adjust the regulating valve of the refrigeration unit according to the first preset step length, The regulating valve is used to control the cold source flow of the refrigeration unit; detect the temperature change of the cold source outlet water, and when the temperature change is greater than the first threshold, continue to adjust the regulating valve according to the first preset step; when the temperature change is less than When the first threshold is reached, adjust the regulating valve of the refrigeration unit according to the second preset step size until the temperature change is zero, wherein the first preset step size is greater than the second preset step size. It is easy to notice that the above-mentioned cooling Source flow includes cold source outflow and cold source inflow.

In some optional embodiments of the present application, the heating capacity of the heating equipment is determined according to the cooling capacity of the refrigeration unit, specifically: the heat absorbed by the flow of the corresponding cold source when the temperature change of the outlet water of the cold source is zero is used as the heat of the refrigeration unit Cooling capacity; then determine the heating capacity of the heating equipment according to the cooling capacity of the refrigeration unit, that is, when the outlet water temperature of the cold source is constant, the cooling capacity of the refrigeration unit in the control room is used as the heating capacity of the heating equipment.

Specifically, when the temperature change of the cold source outlet water is zero, the heat absorbed by the corresponding cold source flow is taken as the heating capacity of the heating equipment, and the heat absorbed by the cold source flow can be determined in the following way: First, the cooling source can be determined Specific heat capacity; and real-time detection of the temperature of the cold source and the volume flow of the cold source; when the temperature change of the cold source is determined to be zero, the density of the cold source; The density of the cold source determines the heat absorption power of the flow of the cold source. It is understandable that the temperature of the water entering and leaving the cold source can be detected by a temperature sensor. The above-mentioned temperature sensor includes but is not limited to: a patch thermocouple. The time corresponding to the temperature change of the source water is obtained as the time Δt of the change. For example, record the initial temperature _t1 corresponding to the moment when the water outlet of the cold source (that is, the moment when the flow of the cold source flows out of the outlet) corresponds to 10:00, and record the temperature when the water outlet temperature of the cold source is constant as _t2 , and _t2 corresponds to The moment is 10:10, then Δt is 10min. It can be understood that after determining the heat absorbed by the flow of the cold source, the heat absorption power of the flow of the cold source can be determined according to the ratio of the heat to Δt. Therefore, the heat dissipation efficiency of the heating device can be determined according to the heating capacity and electric power, which can be based on the above The heat absorption power of the cold source flow is divided by the electric power of the heating equipment to determine the cooling efficiency of the heating equipment.

It should be noted that the volumetric flow rate of the cold source can be determined by a flowmeter, and the above-mentioned flowmeter includes but is not limited to: an ultrasonic flowmeter.

In other optional embodiments of the present application, the heat absorption power of the flow of the cold source can be determined according to the specific heat capacity, the temperature of the inlet and outlet water, the volume capacity and the density of the heat sink. Specifically, the heat absorption power of the flow of the cold source can be determined by the following formula, The formula is: Q＝C×ρV _m (T ₁ -T ₂ ); among them, Q represents the heat absorption power of the cold source flow, and the unit is kW, and C represents the specific heat capacity of the cold source at the average temperature, and the unit is kJ/(kg K ), T ₁ represents the outlet water temperature of the cold source, the unit is ℃, T ₂ represents the water inlet temperature of the cold source, the unit is ℃, V _m represents the volume flow rate of the cold source, the unit is m ³ /s; ρ represents the liquid density of the cold source, The unit is kg/m ³ .

In some optional embodiments of the present application, determining the heating capacity of the heating equipment according to the cooling capacity of the refrigeration unit can be achieved in the following manner: receiving a start instruction, wherein the start instruction is used to start the refrigeration unit and the heating equipment at the same time; responding Start command, when the refrigeration unit and the heating equipment are determined to start at the same time, the heating capacity of the heating equipment is determined according to the cooling capacity of the refrigeration unit. It is understandable that the refrigeration unit and the heating equipment are started at the same time to ensure cooling The cooling capacity produced by the unit is equal to the heating capacity produced by the heating equipment.

In some optional embodiments of the present application, the control room can be located in the enthalpy difference room, and the enthalpy difference room can be used to provide power for the control room. It can be understood that the sensor for measuring the humidity temperature in the control room can be the same as the enthalpy difference room. Temperature and humidity sensor.

In some optional embodiments of this application, the control room can be equipped with a PLC control system to control its own stable operation, and can be connected to the control system of the enthalpy difference room through wired/wireless interconnection, and an independent control box can be added outside the control room. The wiring interface of the fan and the sensor is reserved outside, and the acquisition module and control components are installed in the box; the temperature and humidity in the control room can be collected by the newly added temperature and humidity sensor, and the temperature and humidity can be controlled by the frequency conversion control circulation fan, which can be controlled by Siemens smart200PLC, as the main processor of data collection, collects parameters such as temperature, humidity, and atmospheric pressure in the small room (inside the control room) through the analog quantity collection module; the collected data can be cached by the CPU of the PLC, and then sent to the The way of network communication is stored on the touch all-in-one machine through the force control host computer software, and the collected data is analyzed through the force control software. The experimental results are generated in the form of reports, and the customer can choose whether to save them; It can be stored on the touch integrated device in the form of a database, and historical data can be queried; considering the real-time and accuracy of on-site data, the on-site sensors use custom-made cables for data transmission, and the wiring joints are connected with custom-made aviation plugs. Easy to disassemble and reinstall.

Fig. 2 is a device for determining heat dissipation efficiency according to an embodiment of the present application. As shown in Fig. 2, the device for determining heat dissipation efficiency includes:

An acquisition module 40, configured to acquire the electric power of the heating equipment;

The first determination module 42 is configured to determine the heating capacity of the heating equipment according to the cooling capacity of the refrigeration unit, wherein the heating equipment and the refrigeration unit are located in the same control room;

The second determination module 44 is configured to determine the heat dissipation efficiency of the heating device according to the heating capacity and electric power.

In the above-mentioned device for determining heat dissipation efficiency, the obtaining module 40 is used to obtain the electric power of the heating equipment; the first determining module 42 is used to determine the heating capacity of the heating equipment according to the cooling capacity of the refrigeration unit, wherein the heating equipment and the cooling The units are located in the same control room; the second determination module 44 is used to determine the heat dissipation efficiency of the heating equipment according to the heating capacity and electric power, so as to achieve the purpose of measuring the heating capacity of the heating equipment, thereby realizing The technical effect of determining the heat dissipation efficiency by electricity consumption further solves the technical problems of inaccurate calculation results and the inability to directly measure the heating capacity of the heating equipment due to the fact that the heat dissipation efficiency can only be calculated by relying on the factory nameplate parameters of the heating equipment in the related technology.

In some optional embodiments of the present application, determining the heating capacity of the heating equipment according to the cooling capacity of the refrigeration unit can be achieved in the following manner: receiving a start instruction, wherein the start instruction is used to start the refrigeration unit and the heating equipment at the same time; responding Start command, when the refrigeration unit and the heating equipment are determined to start at the same time, the heating capacity of the heating equipment is determined according to the cooling capacity of the refrigeration unit. It is understandable that the refrigeration unit and the heating equipment are started at the same time to ensure cooling The cooling capacity produced by the unit is equal to the heating capacity produced by the heating equipment.

According to another aspect of the embodiment of the present application, there is also provided a non-volatile storage medium, the non-volatile storage medium includes a stored program, wherein, when the program is running, the device where the non-volatile storage medium is located is controlled to execute any A method of determining cooling efficiency.

Specifically, the above-mentioned storage medium is used to store program instructions for performing the following functions, so as to realize the following functions:

Obtain the electric power of the heating equipment; determine the heating capacity of the heating equipment according to the cooling capacity of the refrigeration unit, wherein the heating equipment and the refrigeration unit are located in the same control room; determine the heat dissipation efficiency of the heating equipment according to the heating capacity and electric power.

According to another aspect of the embodiments of the present application, a processor is also provided, and the processor is configured to run a program stored in a memory, wherein, when the program is running, any method for determining heat dissipation efficiency is executed.

Specifically, the above-mentioned processor is used to call program instructions in the memory to realize the following functions:

Obtain the electric power of the heating equipment; determine the heating capacity of the heating equipment according to the cooling capacity of the refrigeration unit, wherein the heating equipment and the refrigeration unit are located in the same control room; determine the heat dissipation efficiency of the heating equipment according to the heating capacity and electric power.

The serial numbers of the above embodiments of the present application are for description only, and do not represent the advantages and disadvantages of the embodiments.

In the above-mentioned embodiments of the present application, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed technical content can be realized in other ways. Wherein, the device embodiments described above are only illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be another division method. For example, multiple units or components can be combined or can be Integrate into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of units or modules may be in electrical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of this application or the part that contributes to the related technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium. Several instructions are included to make a computer device (which may be a personal computer, server or network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes. .

The above description is only the preferred embodiment of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, some improvements and modifications can also be made. These improvements and modifications are also It should be regarded as the protection scope of this application.

Claims (9)

1. A method of determining heat dissipation efficiency, comprising:

acquiring electric power of heating equipment;

determining the heating capacity of heating equipment according to the refrigerating capacity of a refrigerating unit, wherein the heating equipment and the refrigerating unit are positioned in the same temperature control room;

determining the heat dissipation efficiency of the heating equipment according to the heating quantity and the electric power;

wherein, before confirming the heating capacity of the equipment that heats according to the refrigerating output of refrigerating unit, include: adjusting a regulating valve of the refrigerating unit according to a first preset step length, wherein the regulating valve is used for controlling the cold source flow of the refrigerating unit, and the cold source flow comprises: the cold source outputs water and the cold source inputs water; detecting the temperature change of the cold source outlet water, and when the temperature change is larger than a first threshold value, continuously adjusting the adjusting valve according to the first preset step length; and when the change of the temperature is smaller than the first threshold value, adjusting an adjusting valve of the refrigerating unit according to a second preset step length until the change of the temperature is zero, wherein the first preset step length is larger than the second preset step length.

2. The method of claim 1, wherein determining the amount of heat produced by the heating device based on the amount of cooling generated by the refrigeration unit comprises:

taking the heat absorbed by the flow of the cold source corresponding to the condition that the temperature change of the cold source outlet water is zero as the refrigerating capacity of the refrigerating unit;

and determining the heating capacity of the heating equipment according to the refrigerating capacity of the refrigerating unit.

3. The method of claim 1, wherein the step of taking the heat absorbed by the flow of the cold source corresponding to the zero temperature change of the cold source outlet water as the heating amount of the heating device comprises:

determining the specific heat capacity of the cold source;

detecting the temperature of the cold source inlet and outlet water and the volume flow of the cold source;

determining the density of the cold source when the temperature change of the cold source outlet water is zero;

and determining the heat absorption power of the cold source flow according to the specific heat capacity, the temperature of the inlet and outlet water, the volume flow and the density of the cold source.

4. The method as claimed in claim 3, wherein determining the power absorbed by the heat sink flow according to the specific heat capacity, the temperature of the inlet and outlet water, the volume flow and the density of the heat sink comprises:

determining the heat absorption power of the cold source flow through the following formula: q = C × ρ V _m (T ₁ -T ₂ )；

Wherein Q represents the heat absorption power of the cold source flow, the unit is kW, C represents the specific heat capacity of the cold source at the average temperature, and the unit is kJ/(kg.K), T ₁ Represents the temperature of cold source outlet water with the unit of DEG C ₂ The temperature of cold source inlet water is expressed in the unit of DEG C and V _m Represents the volume flow of the cold source and has the unit of m ³ S; ρ represents the liquid density of the cold source in kg/m ³ 。

5. The method of claim 1, wherein determining the amount of heat produced by the heating device based on the amount of cooling generated by the refrigeration unit comprises:

receiving a starting instruction, wherein the starting instruction is used for simultaneously starting the refrigerating unit and the heating equipment;

and responding to the starting instruction, and determining the heating capacity of the heating equipment according to the refrigerating capacity of the refrigerating unit under the condition that the refrigerating unit and the heating equipment are simultaneously started.

6. The method of any one of claims 1 to 5, wherein the temperature control chamber is located within an enthalpy difference chamber for providing power to the temperature control chamber.

7. An apparatus for determining heat dissipation efficiency, comprising:

the acquisition module is used for acquiring the electric power of the heating equipment;

the first determining module is used for determining the heating capacity of heating equipment according to the refrigerating capacity of a refrigerating unit, wherein the heating equipment and the refrigerating unit are positioned in the same temperature control room;

the second determining module is used for determining the heat dissipation efficiency of the heating equipment according to the heating quantity and the electric power;

wherein, before confirming the heating capacity of the equipment that heats according to the refrigerating output of refrigerating unit, include: adjusting the adjusting valve of the refrigerating unit according to a first preset step length, wherein the adjusting valve is used for controlling the cold source flow of the refrigerating unit, and the cold source flow comprises: the cold source outputs water and the cold source inputs water; detecting the temperature change of the cold source outlet water, and when the temperature change is larger than a first threshold value, continuously adjusting the adjusting valve according to the first preset step length; and when the change of the temperature is smaller than the first threshold value, adjusting an adjusting valve of the refrigerating unit according to a second preset step length until the change of the temperature is zero, wherein the first preset step length is larger than the second preset step length.

8. A non-volatile storage medium, comprising a stored program, wherein a device in which the non-volatile storage medium is located is controlled to perform the method for determining heat dissipation efficiency of any one of claims 1 to 6 when the program is executed.

9. A processor configured to execute a program stored in a memory, wherein the program when executed performs the method for determining heat dissipation efficiency according to any one of claims 1 to 6.

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