Device, method and equipment for testing heat efficiency of gas-fired boiler coupling heat pump system and medium

Abstract

The invention discloses a thermal efficiency testing device, method, equipment and medium for a gas-fired boiler coupling heat pump system, and relates to the technical field of thermal efficiency test.The device comprises a sensing module and a processor, the sensing module is used for collecting thermal efficiency testing parameters of the gas-fired boiler coupling heat pump system, and the processor is used for processing the thermal efficiency testing parameters; the heat efficiency test parameters comprise in-furnace gas temperature, water outlet temperature, water outlet pressure, exhaust smoke component analysis results, exhaust smoke temperature, exhaust smoke temperature after heat tracing, exhaust smoke relative humidity after heat tracing, heat pump circulating pump input power, compressor input power, water inlet temperature, water inlet pressure, water inlet flow and in-furnace air temperature; and the processor is used for calculating the thermal efficiency of the gas-fired boiler coupling heat pump system based on the thermal efficiency test parameters of the gas-fired boiler coupling heat pump system. According to the invention, the thermal efficiency of the gas-fired boiler coupling heat pump system can be accurately tested.

Description

Technical Field

[0001] The present application relates to the technical field of thermal efficiency testing, and in particular to a device, method, equipment and medium for testing the thermal efficiency of a gas boiler coupled heat pump system. Background Art

[0002] With economic development and improved living standards, winter heating demand in northern my country continues to grow, placing higher demands on energy supply. Traditional gas-fired boiler heating systems have low energy efficiency, with significant amounts of energy wasted during conversion and transmission. This is particularly true of waste heat from the flue gas at the end of the boiler, which is not effectively utilized due to the latent heat of vaporization of water vapor in the flue gas. This requires technological innovation to achieve efficient energy utilization. Furthermore, the current application of condensing gas-fired boilers is severely limited, primarily due to the lack of a suitable cold source to recycle the waste heat from the flue gas at the end of the boiler.

[0003] Compression heat pumps, as a green and low-carbon heat supply solution, offer advantages such as environmental protection and energy conservation, high energy efficiency, and low operating costs. Furthermore, compression heat pumps utilize a reverse Carnot cycle and are capable of exporting cooling resources. By coupling a gas-fired boiler with a compression heat pump, waste heat from the flue gas can be fully recovered, recycling the latent heat of vaporization contained in the water vapor in the flue gas. This improves energy efficiency, reduces pollutant emissions, and lowers carbon emissions.

[0004] However, as a new form of heating, there is currently no thermal efficiency testing method for the coupled system of gas boilers and compression heat pumps. It is urgent to establish a thermal efficiency testing scheme for the gas boiler coupled heat pump system. Summary of the Invention

[0005] The purpose of this application is to provide a gas boiler coupled heat pump system thermal efficiency testing device, method, equipment and medium, which can accurately test the thermal efficiency of the gas boiler coupled heat pump system.

[0006] To achieve the above objectives, this application provides the following solutions:

[0007] In a first aspect, the present application provides a gas boiler coupled heat pump system thermal efficiency testing device, the gas boiler coupled heat pump system thermal efficiency testing device comprising: a sensor module and a processor;

[0008] The sensor module is used to collect and obtain thermal efficiency test parameters of the gas boiler coupled heat pump system; the thermal efficiency test parameters include inlet gas temperature, outlet water temperature, outlet water pressure, exhaust gas composition analysis results, exhaust gas temperature, exhaust gas temperature after heating, exhaust gas relative humidity after heating, heat pump circulation pump input power, compressor input power, inlet water temperature, inlet water pressure, inlet water flow, inlet air temperature, atmospheric pressure and relative air humidity;

[0009] The processor is in communication with the sensor module; the processor is used to calculate the thermal efficiency of the gas boiler coupled heat pump system based on the thermal efficiency test parameters.

[0010] Optionally, the calculation formula for the thermal efficiency of the gas boiler coupled heat pump system is:

[0011] η S =100-(q2+q3+q5-q ex );

[0012] Among them, η S is the thermal efficiency of the gas boiler coupled heat pump system; q2 is the exhaust heat loss, which is determined based on the thermal efficiency test parameters of the gas boiler coupled heat pump system; q3 is the heat loss of incomplete combustion of gas, which is determined based on the thermal efficiency test parameters of the gas boiler coupled heat pump system; q5 is the heat dissipation loss, which is determined based on the thermal efficiency test parameters of the gas boiler coupled heat pump system; q ex It is the percentage of external heat to input heat, determined based on the thermal efficiency test parameters of the gas boiler coupled heat pump system.

[0013] Optionally, the input heat is calculated as:

[0014] Q in =Q net.ar +Q aux ;

[0015] Among them, Q in is the input heat; Q net.ar The basic low calorific value of gas received; Q aux It is the heat brought into the heat pump circulation pump and compressor within the system boundary of the gas boiler coupled heat pump system.

[0016] Alternatively, the calculation formula for the heat brought into the heat pump circulation pump and compressor within the system boundary of the gas boiler coupled heat pump system is:

[0017]

[0018] Among them, Q aux Vr is the heat brought into the heat pump circulation pump and compressor within the system boundary of the gas boiler coupled heat pump system; F.Fl is the volume flow rate of gas; P aux.c is the compressor input power; η tr.c The ratio of compressor electric power converted into heat and entering the gas boiler coupled heat pump system; P aux.p is the input power of the heat pump circulation pump; η tr.p The ratio of heat pump circulation pump electrical work converted into heat entering the gas boiler coupled heat pump system.

[0019] Optionally, the sensing module includes a first temperature sensor, a second temperature sensor, a first pressure sensor, a flue gas analyzer, a third temperature sensor, a fourth temperature sensor, a first humidity sensor, a first power sensor, a second power sensor, a fifth temperature sensor, a second pressure sensor, a flow sensor, a sixth temperature sensor, a third pressure sensor, and a second humidity sensor;

[0020] The first temperature sensor is installed on the gas pipeline and is used to collect the temperature of the gas entering the furnace;

[0021] The second temperature sensor and the first pressure sensor are both installed on the water outlet pipe, the second temperature sensor is used to collect and obtain the outlet water temperature, and the first pressure sensor is used to collect and obtain the outlet water pressure;

[0022] The flue gas analyzer, the third temperature sensor, the fourth temperature sensor and the first humidity sensor are all installed on the tail flue. The flue gas analyzer is used to analyze the components of the exhaust gas to obtain the exhaust gas component analysis results. The third temperature sensor is used to collect the exhaust gas temperature. The fourth temperature sensor is used to collect the exhaust gas temperature after heating. The first humidity sensor is used to collect the relative humidity of the exhaust gas after heating.

[0023] The first power sensor and the second power sensor are both installed in the electrical cabinet, the first power sensor is used to collect the input power of the heat pump circulation pump, and the second power sensor is used to collect the input power of the compressor;

[0024] The fifth temperature sensor, the second pressure sensor and the flow sensor are all installed on the water inlet pipe, the fifth temperature sensor is used to collect the water inlet temperature, the second pressure sensor is used to collect the water inlet pressure, and the flow sensor is used to collect the water inlet flow;

[0025] The sixth temperature sensor is installed on the air intake pipe, and is used to collect the temperature of the air entering the furnace;

[0026] The third pressure sensor and the second humidity sensor are both installed outside the gas boiler coupled heat pump system. The third pressure sensor is used to collect and obtain atmospheric pressure, and the second humidity sensor is used to collect and obtain relative air humidity.

[0027] Optionally, the gas boiler coupled heat pump system includes a gas boiler, a heat exchanger and a compression heat pump;

[0028] The gas boiler is used to heat the first hot water output by the compression heat pump using the heat generated by the combustion of gas and air to obtain outlet water and first flue gas;

[0029] The heat exchanger is used to heat the circulating water using the first flue gas to obtain exhaust flue gas and heated circulating water, and to discharge the exhaust flue gas;

[0030] The compression heat pump is used to heat the refrigerant using the heated circulating water to obtain circulating water and refrigerant gas, compress the refrigerant gas to obtain heated refrigerant gas, use the heated refrigerant gas to heat the inlet water to obtain refrigerant liquid and first hot water, and cool and decompress the refrigerant liquid to obtain refrigerant.

[0031] Optionally, the gas boiler includes a burner fan, a burner, a boiler, and an economizer, wherein the burner fan is used to provide air to the burner, the burner is used to burn gas and air, the boiler is used to use heat generated by the combustion of gas and air to heat the second hot water output by the economizer to obtain outlet water and second flue gas, and the economizer is used to use the second flue gas to heat the first hot water output by the compression heat pump to obtain the first flue gas and the second hot water;

[0032] The compression heat pump includes a water inlet circulation pump, a heat pump evaporator, a compressor, a heat pump condenser, an expansion valve and a heat pump circulation pump. The water inlet circulation pump is used to provide water to the heat pump condenser. The heat pump evaporator is used to use the heated circulating water to heat the refrigerant to obtain circulating water and refrigerant gas. The compressor is used to compress the refrigerant gas to obtain heated refrigerant gas. The heat pump condenser is used to heat the water inlet with the heated refrigerant gas to obtain refrigerant liquid and first hot water. The expansion valve is used to cool and reduce the pressure of the refrigerant liquid to obtain refrigerant. The heat pump circulation pump is used to provide circulating water to the heat exchanger.

[0033] In a second aspect, the present application provides a method for testing the thermal efficiency of a gas boiler coupled heat pump system, which is applied to the above-mentioned gas boiler coupled heat pump system thermal efficiency testing device. The method for testing the thermal efficiency of a gas boiler coupled heat pump system includes:

[0034] Obtain thermal efficiency test parameters of a gas boiler coupled heat pump system; the thermal efficiency test parameters include inlet gas temperature, outlet water temperature, outlet water pressure, exhaust gas composition analysis results, exhaust gas temperature, exhaust gas temperature after heating, exhaust gas relative humidity after heating, heat pump circulation pump input power, compressor input power, inlet water temperature, inlet water pressure, inlet water flow rate, inlet air temperature, atmospheric pressure, and relative air humidity;

[0035] Based on the thermal efficiency test parameters, the thermal efficiency of the gas boiler coupled heat pump system is calculated.

[0036] In a third aspect, the present application provides a computer device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-mentioned method for testing the thermal efficiency of a gas boiler coupled heat pump system.

[0037] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for testing the thermal efficiency of a gas boiler coupled heat pump system.

[0038] According to the specific embodiments provided in this application, this application has the following technical effects:

[0039] The present application provides a thermal efficiency testing device, method, equipment, and medium for a gas-fired boiler-coupled heat pump system, including: a sensor module and a processor, wherein the sensor module is used to collect and obtain thermal efficiency test parameters of the gas-fired boiler-coupled heat pump system, the thermal efficiency test parameters including inlet gas temperature, outlet water temperature, outlet water pressure, exhaust gas composition analysis results, exhaust gas temperature, exhaust gas temperature after heating, exhaust gas relative humidity after heating, heat pump circulation pump input power, compressor input power, inlet water temperature, inlet water pressure, inlet water flow, inlet air temperature, atmospheric pressure, and air relative humidity, and the processor is used to calculate the thermal efficiency of the gas-fired boiler-coupled heat pump system based on the thermal efficiency test parameters of the gas-fired boiler-coupled heat pump system. The present application collects the thermal efficiency test parameters of the gas-fired boiler-coupled heat pump system by designing a sensor module, and calculates the thermal efficiency of the gas-fired boiler-coupled heat pump system based on the thermal efficiency test parameters of the gas-fired boiler-coupled heat pump system by designing a processor, thereby accurately testing the thermal efficiency of the gas-fired boiler-coupled heat pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 This is a schematic structural diagram of a typical gas boiler coupled heat pump system provided in Example 1 of the present application.

[0042] Figure 2 This is a flow chart of a method for testing the thermal efficiency of a gas boiler coupled heat pump system provided in Example 2 of the present application.

[0043] Figure 3 A schematic diagram of the structure of a computer device provided in Example 3 of the present application. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] Example 1

[0046] This embodiment provides a thermal efficiency testing device for a gas boiler coupled heat pump system. The thermal efficiency testing device for a gas boiler coupled heat pump system includes a sensor module and a processor.

[0047] The sensor module is used to collect the thermal efficiency test parameters of the gas boiler coupled heat pump system. The thermal efficiency test parameters include the inlet gas temperature, outlet water temperature, outlet water pressure, exhaust gas composition analysis results, exhaust gas temperature, exhaust gas temperature after heating, exhaust gas relative humidity after heating, heat pump circulation pump input power, compressor input power, inlet water temperature, inlet water pressure, inlet water flow, inlet air temperature, atmospheric pressure and relative air humidity.

[0048] The processor is in communication with the sensor module, and is used to calculate the thermal efficiency of the gas boiler coupled heat pump system based on the thermal efficiency test parameters.

[0049] This embodiment first introduces the gas boiler coupled heat pump system in detail. Figure 1 As shown, the gas boiler coupled heat pump system includes a gas boiler, a heat exchanger and a compression heat pump. The gas boiler is used to use the heat generated by the combustion of gas and air to heat the first hot water output by the compression heat pump to obtain outlet water and the first flue gas. The heat exchanger is used to use the first flue gas to heat the circulating water to obtain exhaust flue gas and heated circulating water, and discharge the exhaust flue gas. The compression heat pump is used to use the heated circulating water to heat the refrigerant to obtain circulating water and refrigerant gas, compress the refrigerant gas to obtain heated refrigerant gas, use the heated refrigerant gas to heat the inlet water to obtain refrigerant liquid and the first hot water, and cool the refrigerant liquid to obtain refrigerant.

[0050] Among them, the gas boiler includes a burner fan, a burner, a boiler and an economizer. The burner fan is used to provide air to the burner, the burner is used to burn gas and air, the boiler is used to use the heat generated by the combustion of gas and air to heat the second hot water output by the economizer to obtain outlet water and second flue gas, and the economizer is used to use the second flue gas to heat the first hot water output by the compression heat pump to obtain first flue gas and second hot water.

[0051] Among them, the compression heat pump includes a water inlet circulation pump, a heat pump evaporator, a compressor, a heat pump condenser, an expansion valve and a heat pump circulation pump. The water inlet circulation pump is used to provide water to the heat pump condenser. The heat pump evaporator is used to use the heated circulating water to heat the refrigerant to obtain circulating water and refrigerant gas. The compressor is used to compress the refrigerant gas to obtain heated refrigerant gas. The heat pump condenser is used to heat the water with the heated refrigerant gas to obtain refrigerant liquid and first hot water. The expansion valve is used to cool and reduce the pressure of the refrigerant liquid to obtain refrigerant. The heat pump circulation pump is used to provide circulating water to the heat exchanger.

[0052] The flow process of gas, air, flue gas and other gases in the gas boiler coupled heat pump system is as follows: the high-temperature flue gas formed after the gas and air are ignited in the burner enters the boiler to release heat, and the high-temperature flue gas after heat release is converted into medium-temperature flue gas (i.e., second flue gas), and the medium-temperature flue gas enters the economizer to release heat, and the medium-temperature flue gas after heat release is converted into low-temperature flue gas (i.e., first flue gas), and the low-temperature flue gas enters the heat exchanger to release heat, and the low-temperature flue gas after heat release is converted into exhaust flue gas and discharged into the atmosphere through the tail pipe.

[0053] The water flow process of the gas boiler coupled heat pump system is as follows: the inlet water is pressurized by the inlet circulation pump and then enters the heat pump condenser to absorb the heat of the heated refrigerant gas. The heated water (i.e., the first hot water) enters the economizer to absorb the heat of the medium-temperature flue gas. The water heated again (i.e., the second hot water) enters the boiler to absorb the heat of the high-temperature flue gas. The water heated by the medium and high-temperature flue gas in the boiler (i.e., the outlet water) is output to the user end.

[0054] The flow process of the refrigerant (i.e., refrigerant) in a compression heat pump is as follows: the refrigerant in the heat pump evaporator absorbs the heat from the heated circulating water and evaporates into a low-temperature, low-pressure gaseous refrigerant (i.e., refrigerant gas). The low-temperature, low-pressure gaseous refrigerant is compressed by the compressor and converted into a high-temperature, high-pressure gaseous refrigerant (i.e., heated refrigerant gas). The high-temperature, high-pressure gaseous refrigerant enters the heat pump condenser and exchanges heat with the inlet water, and is condensed into a medium-temperature, high-pressure liquid refrigerant (i.e., refrigerant liquid). The medium-temperature, high-pressure liquid refrigerant is cooled and reduced in pressure by the expansion valve and enters the heat pump evaporator. The refrigerant in the heat pump evaporator absorbs the heat from the heated circulating water and evaporates into a low-temperature, low-pressure gaseous refrigerant, which is sucked into the compressor again and compressed again to enter the next refrigeration cycle.

[0055] The circulation process of circulating water in the heat exchanger is as follows: the circulating water is pressurized by the heat pump circulating pump and enters the heat exchanger, absorbs the heat of the low-temperature flue gas and enters the heat pump evaporator to release heat. After releasing heat, the circulating water is pressurized by the heat pump circulating pump and enters the heat exchanger again to absorb heat, forming a cycle.

[0056] The specific structure of the above-mentioned gas boiler coupled heat pump system is only an example given in this embodiment. The thermal efficiency testing device of the gas boiler coupled heat pump system in this embodiment is also applicable to gas boiler coupled heat pump systems of other structures and should not be understood as limiting this embodiment.

[0057] This embodiment further divides the system boundary of the gas boiler coupled heat pump system, such as Figure 1 As shown in the dotted box, thermal efficiency testing and calculation are carried out within the system boundary. There is an inflow and outflow of matter and energy on the system boundary. Matter includes gas, air, exhaust gas, etc. Energy includes the basic low-level calorific value of gas, the electric power of the heat pump circulation pump, the electric power of the compressor, etc.

[0058] This embodiment is arranged on a gas boiler coupled heat pump system Figure 1 The 15 measuring points A to O shown are used to test parameters such as flow rate, temperature, and pressure for calculating thermal efficiency. The names and locations of the measuring points are shown in Table 1.

[0059] Table 1 Measurement point arrangement

[0060]

[0061]

[0062] At this time, in this embodiment, the sensor module is used to collect and obtain the thermal efficiency test parameters of the gas boiler coupled heat pump system. The thermal efficiency test parameters include the inlet gas temperature, the outlet water temperature, the outlet water pressure, the exhaust gas composition analysis results, the exhaust gas temperature, the exhaust gas temperature after heating, the exhaust gas relative humidity after heating, the heat pump circulation pump input power, the compressor input power, the inlet water temperature, the inlet water pressure, the inlet water flow rate, the inlet air temperature, the atmospheric pressure and the relative humidity of the air.

[0063] Specifically, the sensing module includes a first temperature sensor, a second temperature sensor, a first pressure sensor, a flue gas analyzer, a third temperature sensor, a fourth temperature sensor, a first humidity sensor, a first power sensor, a second power sensor, a fifth temperature sensor, a second pressure sensor, a flow sensor, a sixth temperature sensor, a third pressure sensor and a second humidity sensor.

[0064] The first temperature sensor is installed on the gas pipeline, and is used to collect the temperature of the gas entering the furnace.

[0065] The second temperature sensor and the first pressure sensor are both installed on the water outlet pipe. The second temperature sensor is used to collect and obtain the outlet water temperature, and the first pressure sensor is used to collect and obtain the outlet water pressure.

[0066] The flue gas analyzer, the third temperature sensor, the fourth temperature sensor and the first humidity sensor are all installed on the tail flue. The flue gas analyzer is used to analyze the components of the exhaust gas and obtain the exhaust gas component analysis results. The exhaust gas component analysis results include the content of various chemical components in the exhaust gas. The third temperature sensor is used to collect the exhaust gas temperature. The fourth temperature sensor is used to collect the exhaust gas temperature after heating. The first humidity sensor is used to collect the relative humidity of the exhaust gas after heating.

[0067] The first power sensor and the second power sensor are both installed in the electric cabinet. The first power sensor is used to collect the input power of the heat pump circulation pump, and the second power sensor is used to collect the input power of the compressor.

[0068] The fifth temperature sensor, the second pressure sensor and the flow sensor are all installed on the water inlet pipe. The fifth temperature sensor is used to collect the water inlet temperature, the second pressure sensor is used to collect the water inlet pressure, and the flow sensor is used to collect the water inlet flow.

[0069] The sixth temperature sensor is installed on the air intake duct, and is used to collect the temperature of the air entering the furnace.

[0070] The third pressure sensor and the second humidity sensor are both installed outside the gas boiler coupled heat pump system. The third pressure sensor is used to collect atmospheric pressure, and the second humidity sensor is used to collect relative air humidity.

[0071] It should be noted that heat tracing refers to heating the exhaust gas pipeline that transports it to the flue gas analyzer to prevent condensation of water vapor in the exhaust gas. The exhaust gas temperature refers to the temperature of the exhaust gas discharged from the tail flue. The exhaust gas temperature after heat tracing refers to the temperature of the exhaust gas in the pipeline transporting it to the flue gas analyzer. The exhaust gas relative humidity after heat tracing refers to the relative humidity of the exhaust gas in the pipeline transporting it to the flue gas analyzer.

[0072] The following test conditions should be met before the thermal efficiency test:

[0073] (1) All equipment in the system operates normally and meets the test requirements.

[0074] (2) Conduct a rigorous inspection of the entire system, including:

[0075] 1) Eliminate unnecessary leakage of flue gas.

[0076] 2) Eliminate water, gas and air leaks.

[0077] 3) Eliminate leakage of circulating water.

[0078] 4) Eliminate leakage of refrigerant.

[0079] 5) Ensure that the test device is isolated from other non-test systems.

[0080] (3) Verify or calibrate all instruments involved in the test.

[0081] (4) From the beginning to the end of the test, all test parameters that need to be controlled, such as flow, temperature, and pressure, should be kept as consistent and stable as possible.

[0082] After the thermal efficiency test parameters are obtained through testing, the processor is used to calculate the thermal efficiency of the gas boiler coupled heat pump system based on the thermal efficiency test parameters.

[0083] When calculating thermal efficiency, the thermal efficiency of the gas boiler coupled heat pump system is calculated using the heat loss method (also known as the energy balance method / counter-balance method). The calculation formula for the thermal efficiency of the gas boiler coupled heat pump system is:

[0084]

[0085] Among them, η S is the thermal efficiency of the gas boiler coupled heat pump system, in %; Q O The output heat is expressed in kilojoules per cubic meter (kJ / m 3 );Q in is the input heat, in kilojoules per cubic meter (kJ / m 3 );Q loss is the heat loss, expressed in kilojoules per cubic meter (kJ / m 3 );Q ex External heat, unit is kilojoule per cubic meter (kJ / m 3 ) ; q2 is the exhaust heat loss, in %, determined based on the thermal efficiency test parameters of the gas boiler coupled heat pump system; q3 is the heat loss of incomplete combustion of gas, in %, determined based on the thermal efficiency test parameters of the gas boiler coupled heat pump system; q5 is the heat loss, in %, determined based on the thermal efficiency test parameters of the gas boiler coupled heat pump system; q ex It is the percentage of external heat to input heat, in %, and is determined based on the thermal efficiency test parameters of the gas boiler coupled heat pump system.

[0086] The formula for calculating the output heat is:

[0087]

[0088] Among them, Q O The output heat is expressed in kilojoules per cubic meter (kJ / m 3 );Vr F.Fl is the volume flow of gas in cubic meters per hour (m 3 / h), which is an unknown parameter, is determined by the following method: first assume the thermal efficiency of the gas boiler coupled heat pump system, calculate the volume flow rate of gas by using the input heat, system circulating water volume, system outlet water enthalpy, system inlet water enthalpy, and the assumed thermal efficiency of the gas boiler coupled heat pump system, and calculate the thermal efficiency of the gas boiler coupled heat pump system using the calculated volume flow rate of gas and the thermal efficiency calculation formula of the gas boiler coupled heat pump system. Compare the assumed thermal efficiency of the gas boiler coupled heat pump system with the calculated thermal efficiency of the gas boiler coupled heat pump system. When the difference between the two is greater than 1%, use the calculated thermal efficiency of the gas boiler coupled heat pump system as the assumed value, and calculate the thermal efficiency of the gas boiler coupled heat pump system again according to the above steps. When the difference between the two is not greater than 1%, the volume flow rate of gas calculated this time is the determined volume flow rate of gas; Mr. Cw.FI is the system circulating water volume, in kilograms per hour (kg / h), that is, the water inlet flow rate obtained at the measuring point L; H Lv is the outlet water enthalpy of the system, in kilojoules per kilogram (kJ / kg), determined based on the outlet water temperature obtained at measuring point B and the outlet water pressure obtained at measuring point C; H En is the system inlet water enthalpy, in kilojoules per kilogram (kJ / kg), determined based on the inlet water temperature obtained at measuring point J and the inlet water pressure obtained at measuring point K.

[0089] The formula for calculating heat input is:

[0090] Q in =Q net.ar +Q aux ;

[0091] Among them, Q in is the input heat, in kilojoules per cubic meter (kJ / m 3 );Q net.ar The received low calorific value of the gas is expressed in kilojoules per cubic meter (kJ / m 3 );Q aux The heat brought into the heat pump circulation pump and compressor within the system boundary of the gas boiler coupled heat pump system, in kilojoules per cubic meter (kJ / m 3 ).

[0092] The calculation formula for the heat brought into the heat pump circulation pump and compressor within the system boundary of the gas boiler coupled heat pump system is:

[0093]

[0094] Among them, Q aux The heat brought into the heat pump circulation pump and compressor within the system boundary of the gas boiler coupled heat pump system, in kilojoules per cubic meter (kJ / m 3 );Vr F.Flis the volume flow of gas in cubic meters per hour (m 3 / h); P aux.c is the compressor input power obtained at measuring point I, in kilowatts (kW); η tr.c The ratio of compressor electric power converted into heat and entering the gas boiler coupled heat pump system, in %; P aux.p is the heat pump circulation pump input power obtained at measuring point H, in kilowatts (kW); η tr.p The ratio of heat pump circulation pump electrical work converted into heat and fed into the gas boiler coupled heat pump system, expressed in %.

[0095] The following is a detailed introduction to the calculation process of exhaust heat loss, incomplete combustion heat loss, heat dissipation loss, and the percentage of external heat to input heat:

[0096] (1) Exhaust heat loss

[0097] The calculation formula for exhaust heat loss is:

[0098] q2=q 2.fg.d +q 2.fg.Cond +q 2.fg.Cond.l ;

[0099] Among them, q2 is the exhaust heat loss, the unit is %; q 2.fg.d is the dry flue gas loss, in %; q 2.fg.Cond The sensible heat loss caused by the water vapor carried by the flue gas at the heat exchanger outlet, in %; q 2.fg.Cond.l It is the heat change caused by condensation of water vapor in the flue gas, the unit is %.

[0100] 1) Dry flue gas loss

[0101] The calculation formula for dry flue gas loss is:

[0102]

[0103] Among them, q 2.fg.d is the dry flue gas loss, in %; V fg.d.g The dry flue gas volume generated by burning each cubic meter of gas, in cubic meters per cubic meter (m 3 / m 3 );c p.fg.d is the average specific heat capacity of the dry flue gas at the heat exchanger outlet at constant pressure, in kilojoules per cubic meter Celsius [kJ / (m 3 ·℃)];t fg.Cond.Lv is the flue gas temperature leaving the system boundary, in degrees Celsius (℃), that is, the exhaust flue gas temperature obtained at measuring point E; t fg.Cond.Re Q is the reference temperature of the flue gas leaving the system boundary, in degrees Celsius (℃), and the reference temperature can be 25℃; inis the input heat, in kilojoules per cubic meter (kJ / m 3 ).

[0104] The calculation formula for the volume of dry flue gas generated per cubic meter of gas combustion is:

[0105]

[0106] Among them, V fg.d.g The dry flue gas volume generated by burning each cubic meter of gas, in cubic meters per cubic meter (m 3 / m 3 ); is the volume fraction of carbon dioxide in the fuel gas, in %; is the volume fraction of carbon monoxide in the fuel gas, in %; is the volume fraction of hydrogen sulfide in the fuel gas, in %; m is the number of carbon atoms in the hydrocarbon; is the volume fraction of hydrocarbons in the fuel gas, in %; V a.d.th.g The theoretical dry air volume corresponding to each cubic meter of gas combustion, the unit is cubic meter per cubic meter (m 3 / m 3 ); is the volume fraction of nitrogen in the fuel gas, in %; α is the excess air coefficient.

[0107] The calculation formula for the theoretical dry air volume per cubic meter of gas combustion is:

[0108]

[0109] Among them, V a.d.th.g The theoretical dry air volume corresponding to each cubic meter of gas combustion, the unit is cubic meter per cubic meter (m 3 / m 3 ); is the volume fraction of carbon monoxide in the fuel gas, in %; is the volume fraction of hydrogen in the fuel gas, in %; is the volume fraction of hydrogen sulfide in the fuel gas, in %; m is the number of carbon atoms in the hydrocarbon; n is the number of hydrogen atoms in the hydrocarbon; is the volume fraction of hydrocarbons in the fuel gas, in %; is the volume fraction of oxygen in the fuel gas, in %.

[0110] The theoretical calculation formula for excess air coefficient is:

[0111]

[0112] Among them, α is the excess air coefficient; V aThe actual amount of air fed into the furnace per cubic meter of gas combustion is expressed in cubic meters per cubic meter (m 3 / m 3 );V a.th The amount of air required for complete combustion of each cubic meter of gas is called the theoretical air volume, and its unit is cubic meter per cubic meter (m 3 / m 3 ).

[0113] Based on the above theoretical calculation formula, the calculation formula for the excess air coefficient at the smoke exhaust is:

[0114]

[0115] Among them, α is the excess air coefficient, which is used in actual calculations; is the volume fraction of oxygen in the flue gas, in %; is the volume fraction of carbon monoxide in the flue gas, in %; is the volume fraction of hydrogen in the flue gas, in %; is the volume fraction of methane in the flue gas, in %; is the volume fraction of nitrogen in the flue gas, in %; is the volume fraction of nitrogen in the fuel gas, in %; is the volume fraction of RO2 in the flue gas, specifically the sum of the volume fractions of carbon dioxide CO2 and sulfur dioxide SO2 in the flue gas, in %; is the volume fraction of carbon dioxide in the fuel gas, in %; is the volume fraction of carbon monoxide in the fuel gas, in %; m is the number of carbon atoms in the hydrocarbon; is the volume fraction of hydrocarbons in the fuel gas, in %; is the volume fraction of hydrogen sulfide in the fuel gas, in %.

[0116] The calculation formula for the average specific constant pressure heat capacity of dry flue gas at the heat exchanger outlet is:

[0117]

[0118] Among them, c p.fg.d is the average specific heat capacity of the dry flue gas at the heat exchanger outlet at constant pressure, in kilojoules per cubic meter Celsius [kJ / (m 3 ℃)]; is the volume fraction of carbon dioxide in the flue gas, in %; is the specific heat capacity of carbon dioxide at constant pressure in flue gas, expressed in kilojoules per cubic meter Celsius [kJ / (m 3 ℃)]; is the volume fraction of nitrogen in the flue gas, in %; is the specific heat capacity of nitrogen at constant pressure in the flue gas, expressed in kilojoules per cubic meter Celsius [kJ / (m 3 ℃)]; is the volume fraction of oxygen in the flue gas, in %; is the specific heat capacity of oxygen in the flue gas at constant pressure, expressed in kilojoules per cubic meter Celsius [kJ / (m 3 ℃)]; is the volume fraction of carbon monoxide in the flue gas, in %; c p.CO is the specific heat capacity of carbon monoxide at constant pressure in flue gas, expressed in kilojoules per cubic meter Celsius [kJ / (m 3 ℃)]; is the volume fraction of hydrogen in the flue gas, in %; is the specific heat capacity of hydrogen at constant pressure in the flue gas, expressed in kilojoules per cubic meter Celsius [kJ / (m 3 ℃)]; is the volume fraction of hydrocarbons in the flue gas, in %; is the specific heat capacity at constant pressure of hydrocarbons in the flue gas, expressed in kilojoules per cubic meter Celsius [kJ / (m 3 ·℃)].

[0119] It should be noted that The exhaust gas composition analysis results obtained at the measuring point D are used to determine the p.fg.d 、 c p.CO 、 They are all determined based on the exhaust gas temperature obtained at measuring point E.

[0120] 2) Sensible heat loss caused by water vapor carried by the flue gas at the heat exchanger outlet

[0121] Considering the heat change caused by the condensation of some water vapor in the flue gas, the calculation formula for the sensible heat loss caused by the water vapor carried by the flue gas at the heat exchanger outlet is:

[0122]

[0123] Among them, q 2.fg.Cond The sensible heat loss caused by water vapor carried by the flue gas at the heat exchanger outlet, in %; The water vapor content in the flue gas at the heat exchanger outlet corresponding to each cubic meter of gas, in cubic meters per cubic meter (m 3 / m 3 ); is the specific heat capacity of water vapor at constant pressure, expressed in kilojoules per cubic meter Celsius [kJ / (m 3 ·℃)], determined according to the exhaust gas temperature obtained at the measuring point E; t fg.Cond.Lvis the flue gas temperature leaving the system boundary, in degrees Celsius (℃), that is, the exhaust flue gas temperature obtained at measuring point E; t fg.Cond.Re Q is the reference temperature of the flue gas leaving the system boundary, in degrees Celsius (℃), and the reference temperature can be 25℃; in is the input heat, in kilojoules per cubic meter (kJ / m 3 ).

[0124] The calculation formula for the water vapor content in the flue gas at the heat exchanger outlet per cubic meter of gas is:

[0125]

[0126] in, The water vapor content in the flue gas at the heat exchanger outlet corresponding to each cubic meter of gas, in cubic meters per cubic meter (m 3 / m 3 ); 1.338 is the dry flue gas density, in kilograms per cubic meter (kg / m 3 ); 0.804 is the water vapor density, in kilograms per cubic meter (kg / m 3 );h ab.fg is the moisture content of the flue gas at the heat exchanger outlet, in kilograms per kilogram (kg / kg), calculated based on the exhaust gas temperature after heating obtained at measuring point F and the relative humidity of the exhaust gas after heating obtained at measuring point G; V fg.d.g The dry flue gas volume generated by burning each cubic meter of gas, in cubic meters per cubic meter (m 3 / m 3 ).

[0127] The calculation formula for the moisture content of the flue gas at the heat exchanger outlet is:

[0128]

[0129] Among them, h ab.fg is the moisture content of the flue gas at the heat exchanger outlet, in kilograms per kilogram (kg / kg); h ab.RH is the relative humidity of the flue gas after heating, in %, i.e. the relative humidity of the exhaust gas after heating obtained at measuring point G; p st.Sat.fg is the saturated pressure of water vapor in the flue gas, in millipascals (hPa), calculated based on the exhaust gas temperature after heating obtained at the measuring point F; p at is the atmospheric pressure in Pascals (Pa), that is, the atmospheric pressure obtained at the measuring point N.

[0130] The calculation formula for the saturation pressure of water vapor in flue gas is:

[0131]

[0132] Among them, pst.Sat.fg is the saturated pressure of water vapor in the flue gas, in millipascals (hPa), calculated based on the exhaust gas temperature after heating obtained at the measuring point F; t i The exhaust gas temperature after heating is in degrees Celsius (℃), that is, the exhaust gas temperature after heating obtained at measuring point F.

[0133] 3) Heat changes caused by condensation of water vapor in flue gas

[0134] The latent heat of vaporization after condensation of water vapor is absorbed by the system. The heat released by the condensed water vapor should be a negative value for the system loss, and the sensible heat of the condensed water is a positive value. The calculation formula for the heat change caused by the condensation of water vapor in the flue gas is:

[0135]

[0136] Among them, q 2.fg.Cond.l is the heat change caused by condensation of water vapor in the flue gas, in %; The amount of water vapor condensed from the flue gas generated by each cubic meter of gas combustion after passing through the heat exchanger, in cubic meters per cubic meter (m 3 / m 3 );γ Cond is the latent heat of vaporization of water vapor at the average pressure of the flue gas at the heat exchanger outlet, in kilojoules per kilogram (kJ / kg), determined based on the exhaust gas temperature obtained at measuring point E; Q in is the input heat, in kilojoules per cubic meter (kJ / m 3 ); is the specific heat capacity of water vapor at constant pressure, expressed in kilojoules per cubic meter Celsius [kJ / (m 3 ·℃)], determined according to the exhaust gas temperature obtained at the measuring point E; t fg.Cond.Lv is the flue gas temperature leaving the system boundary, in degrees Celsius (℃), that is, the exhaust flue gas temperature obtained at measuring point E; t fg.Cond.Re The reference temperature of the flue gas leaving the system boundary is in degrees Celsius (℃), and the reference temperature can be taken as 25℃.

[0137] The calculation formula for the amount of water vapor condensed from the flue gas generated by each cubic meter of gas combustion after passing through the heat exchanger is:

[0138]

[0139] in, The amount of water vapor condensed from the flue gas generated by each cubic meter of gas combustion after passing through the heat exchanger, in cubic meters per cubic meter (m 3 / m 3 ); It is the total moisture in the uncondensed flue gas generated by combustion of each cubic meter of gas, including moisture brought in by gas, moisture brought in by air and moisture generated by combustion of hydrogen in gas, in cubic meters per cubic meter (m 3 / m 3 ); The water vapor content in the flue gas at the heat exchanger outlet corresponding to each cubic meter of gas, in cubic meters per cubic meter (m 3 / m 3 ).

[0140] The calculation formula for the total moisture in the uncondensed flue gas generated by combustion of gas per cubic meter is:

[0141]

[0142] in, It is the total moisture in the uncondensed flue gas generated by combustion of each cubic meter of gas, including moisture brought in by gas, moisture brought in by air and moisture generated by combustion of hydrogen in gas, in cubic meters per cubic meter (m 3 / m 3 ); The amount of water vapor carried by each cubic meter of gas, in cubic meters per cubic meter (m 3 / m 3 ); The amount of water vapor carried in the air required for burning each cubic meter of gas, in cubic meters per cubic meter (m 3 / m 3 ); The amount of water vapor produced by the combustion of hydrogen in each cubic meter of gas, in cubic meters per cubic meter (m 3 / m 3 ).

[0143] The formula for calculating the amount of water vapor carried by each cubic meter of gas is:

[0144]

[0145] in, The amount of water vapor carried by each cubic meter of gas, in cubic meters per cubic meter (m 3 / m 3 );ρ F.g is the density of dry fuel gas in kilograms per cubic meter (kg / m 3 ), determined according to the temperature of the inlet gas obtained at measuring point A; h ab.F The moisture content of gas refers to the mass of water vapor in each kilogram of dry gas, with the unit of kilogram per kilogram (kg / kg), and the value can be 0.01; 0.804 is the water vapor density, with the unit of kilogram per cubic meter (kg / m 3 ).

[0146] The calculation formula for the amount of water vapor carried in the air required for combustion of each cubic meter of gas is:

[0147]

[0148] in, The amount of water vapor carried in the air required for burning each cubic meter of gas, in cubic meters per cubic meter (m 3 / m 3 ); 1.293 is the density of dry air, in kilograms per cubic meter (kg / m 3 );h ab.a V is the air moisture content, which refers to the mass of water vapor in each kilogram of dry air, and the unit is kilogram per kilogram (kg / kg). It is calculated based on the relative humidity of the air obtained at the measuring point O; a.d.g The actual amount of dry air required for combustion of each cubic meter of gas is expressed in cubic meters per cubic meter (m 3 / m 3 ); 0.804 is the water vapor density, in kilograms per cubic meter (kg / m 3 ); α is the excess air coefficient; V a.d.th.g The theoretical dry air volume corresponding to each cubic meter of gas combustion, the unit is cubic meter per cubic meter (m 3 / m 3 ).

[0149] The formula for calculating the humidity of air is:

[0150]

[0151] Among them, h ab.a The humidity of air refers to the mass of water vapor in every kilogram of dry air, and the unit is kilogram per kilogram (kg / kg); h RH.a is the relative humidity of the air, in %, i.e. the relative humidity of the air obtained at the measuring point O; p st.Sat.a For t a The saturated pressure of water vapor in the air at the temperature, in Pascals (Pa), is calculated based on the inlet air temperature obtained at the measuring point M; p at is the local atmospheric pressure in Pascals (Pa), that is, the atmospheric pressure obtained at the measuring point N.

[0152] In the range of 0℃~50℃, at t a The calculation formula for the saturated pressure of water vapor in air at temperature is:

[0153] p st.Sat.a =611.7927+42.7809·t a +1.6883·t a 2+1.2079×10 -2 ·t a 3 +6.1637×10 -4 ·t a 4 ;

[0154] Among them, p st.Sat.a For t a The saturated pressure of water vapor in the air at the temperature, in Pascals (Pa); t a The measured air temperature is in degrees Celsius (℃), that is, the inlet air temperature obtained at the measuring point M.

[0155] The calculation formula for the actual amount of dry air required for combustion of each cubic meter of gas is:

[0156] V a.d.g =α·V a.d.th.g ;

[0157] Among them, V a.d.g The actual amount of dry air required for combustion of each cubic meter of gas is expressed in cubic meters per cubic meter (m 3 / m 3 ); α is the excess air coefficient; V a.d.th.g The theoretical dry air volume corresponding to each cubic meter of gas combustion, the unit is cubic meter per cubic meter (m 3 / m 3 ).

[0158] The calculation formula for the amount of water vapor produced by hydrogen combustion in each cubic meter of gas is:

[0159]

[0160] in, The amount of water vapor produced by the combustion of hydrogen in each cubic meter of gas, in cubic meters per cubic meter (m 3 / m 3 ); is the volume fraction of hydrogen sulfide in the fuel gas, in %; is the volume fraction of hydrogen in the fuel gas, in %; n is the number of hydrogen atoms in the hydrocarbon; The volume fraction of hydrocarbons in the fuel gas, in %.

[0161] The material flows (air, fuel gas and flue gas) entering and leaving the system are all calculated based on the reference temperature to calculate the sensible heat loss and external heat. The reference temperature in this embodiment is 25°C.

[0162] (2) Heat loss from incomplete combustion of gas

[0163] The heat loss of incomplete combustion of gas refers to the loss caused by carbon monoxide and unburned hydrocarbons in the flue gas. The calculation formula for the heat loss of incomplete combustion of gas is:

[0164]

[0165] Wherein, q3 is the heat loss of incomplete combustion of gas, in %; V fg.d.g The dry flue gas volume generated by burning each cubic meter of gas, in cubic meters per cubic meter (m 3 / m 3 ); is the volume fraction of carbon monoxide in the flue gas, in %; is the volume fraction of methane in the flue gas, in %; is the volume fraction of hydrogen in the flue gas, in %; is the volume fraction of hydrocarbons in the flue gas, in %; Q in is the input heat, in kilojoules per cubic meter (kJ / m 3 ).

[0166] (3) Heat loss

[0167] Heat dissipation loss refers to the loss caused by surface radiation and convection. The heat dissipation loss is calculated as follows:

[0168]

[0169] Among them, q5 is the heat loss, the unit is %; 1670 is the empirical coefficient; A Src,S is the heat dissipation area, in square meters (m 2 );Vr F.Fl is the volume flow of gas in cubic meters per hour (m 3 / h); Q in is the input heat, in kilojoules per cubic meter (kJ / m 3 ).

[0170] (4) The percentage of external heat to input heat

[0171] The external heat entering the system includes the external heat carried by the dry air, the external heat brought by the moisture in the air, and the external heat brought by the sensible heat of the gas. The calculation formula for the percentage of external heat to input heat is:

[0172]

[0173] Among them, q ex The percentage of external heat to input heat, unit is %; V a.d.g The actual amount of dry air required for combustion of each cubic meter of gas is expressed in cubic meters per cubic meter (m3 / m 3 );c p.a.d is the specific heat capacity of dry air at constant pressure, expressed in kilojoules per cubic meter Celsius [kJ / (m 3 ·℃)], determined based on the inlet air temperature obtained at the measuring point M; t a.d is the dry air temperature entering the system, in degrees Celsius (℃), that is, the air temperature entering the furnace obtained at the measuring point M; t Re is the air reference temperature, in degrees Celsius (℃), and the reference temperature can be 25℃; Q in is the input heat, in kilojoules per cubic meter (kJ / m 3 ); The amount of water vapor carried in the air required for burning each cubic meter of gas, in cubic meters per cubic meter (m 3 / m 3 ); is the water vapor enthalpy corresponding to the dry air temperature entering the system, in kilojoules per cubic meter (kJ / m 3 ), determined based on the inlet air temperature obtained at measuring point M; is the water vapor enthalpy corresponding to the reference temperature of the air entering the system, in kilojoules per cubic meter (kJ / m 3 ), determined based on the air reference temperature; H F.En The gas enthalpy corresponding to the gas temperature entering the system is expressed in kilojoules per cubic meter (kJ / m 3 ), determined based on the inlet gas temperature obtained at measuring point A; H F.Re The enthalpy of the gas corresponding to the base temperature of the gas entering the system is expressed in kilojoules per cubic meter (kJ / m 3 ), determined based on the gas reference temperature, which can be taken as the reference temperature of 25°C.

[0174] Current thermal efficiency testing methods for gas-fired boilers are primarily based on GB / T 10108, "Industrial Boiler Thermal Performance Test Procedure," GB / T, "Power Station Boiler Performance Test Procedure," and NB / T 47066, "Condensing Boiler Thermal Performance Test Method." However, these standards limit the thermal efficiency testing methods to gas-fired boilers and do not provide thermal efficiency testing methods for coupled systems of gas-fired boilers and compression heat pumps. When a gas-fired boiler is coupled with a compression heat pump, the energy input into the system includes not only the received base low-level calorific value of the gas but also the electrical power input by the heat pump's circulating pump and compressor. This embodiment fully considers the utilization efficiency of all heat entering the coupled boiler and heat pump system within its boundaries, and innovatively proposes a thermal efficiency testing scheme for the coupled system.

[0175] Example 2

[0176] This embodiment provides a method for testing the thermal efficiency of a gas boiler coupled heat pump system, which is applied to the thermal efficiency testing device for a gas boiler coupled heat pump system described in Example 1. Figure 2 As shown, the thermal efficiency test method of the gas boiler coupled heat pump system includes:

[0177] S1: Obtain thermal efficiency test parameters of the gas boiler coupled heat pump system; the thermal efficiency test parameters include inlet gas temperature, outlet water temperature, outlet water pressure, exhaust gas composition analysis results, exhaust gas temperature, exhaust gas temperature after heating, exhaust gas relative humidity after heating, heat pump circulation pump input power, compressor input power, inlet water temperature, inlet water pressure, inlet water flow, inlet air temperature, atmospheric pressure and relative air humidity.

[0178] S2: Based on the thermal efficiency test parameters, the thermal efficiency of the gas boiler coupled heat pump system is calculated.

[0179] Example 3

[0180] In an exemplary embodiment, a computer device is provided. The computer device may be a server or a terminal. The internal structure diagram thereof may be as follows: Figure 3 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O) and a communication interface. The processor, memory and input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store data. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for testing the thermal efficiency of a gas boiler coupled heat pump system is implemented.

[0181] Those skilled in the art will understand that Figure 3 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0182] In an exemplary embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor implements the thermal efficiency testing method of the gas boiler coupled heat pump system in Example 2 when executing the computer program.

[0183] Example 4

[0184] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program. When the computer program is executed by a processor, the method for testing the thermal efficiency of a gas boiler coupled heat pump system in Example 2 is implemented.

[0185] Example 5

[0186] In an exemplary embodiment, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the method for testing the thermal efficiency of the gas boiler coupled heat pump system in embodiment 2 is implemented.

[0187] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0188] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0189] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core concept of this application. At the same time, for those skilled in the art, based on the concept of this application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A thermal efficiency test device for a gas boiler coupled heat pump system, characterized in that: The thermal efficiency testing device of the gas boiler coupled heat pump system includes: a sensor module and a processor; The sensor module is used to collect and obtain thermal efficiency test parameters of the gas boiler coupled heat pump system; the thermal efficiency test parameters include inlet gas temperature, outlet water temperature, outlet water pressure, exhaust gas composition analysis results, exhaust gas temperature, exhaust gas temperature after heating, exhaust gas relative humidity after heating, heat pump circulation pump input power, compressor input power, inlet water temperature, inlet water pressure, inlet water flow, inlet air temperature, atmospheric pressure and relative air humidity; The processor is in communication with the sensor module; the processor is used to calculate the thermal efficiency of the gas boiler coupled heat pump system based on the thermal efficiency test parameters.

2. The thermal efficiency testing device for a gas boiler coupled heat pump system according to claim 1, characterized in that: The calculation formula for the thermal efficiency of the gas boiler coupled heat pump system is: η S =100-(q2+q3+q5-q ex ); Among them, η S is the thermal efficiency of the gas boiler coupled heat pump system; q2 is the exhaust heat loss, which is determined based on the thermal efficiency test parameters of the gas boiler coupled heat pump system; q3 is the heat loss of incomplete combustion of gas, which is determined based on the thermal efficiency test parameters of the gas boiler coupled heat pump system; q5 is the heat dissipation loss, which is determined based on the thermal efficiency test parameters of the gas boiler coupled heat pump system; q ex It is the percentage of external heat to input heat, determined based on the thermal efficiency test parameters of the gas boiler coupled heat pump system.

3. The thermal efficiency testing device for a gas boiler coupled heat pump system according to claim 2, characterized in that: The formula for calculating heat input is: Q in =Q net.ar +Q aux ; Among them, Q in is the input heat; Q net.ar The low calorific value of gas received; Q aux It is the heat brought into the heat pump circulation pump and compressor within the system boundary of the gas boiler coupled heat pump system.

4. The thermal efficiency testing device for a gas boiler coupled heat pump system according to claim 3, characterized in that: The calculation formula for the heat brought into the heat pump circulation pump and compressor within the system boundary of the gas boiler coupled heat pump system is: Among them, Q aux Vr is the heat brought into the heat pump circulation pump and compressor within the system boundary of the gas boiler coupled heat pump system; F.Fl is the volume flow rate of gas; P aux.c is the compressor input power; η tr.c The ratio of compressor electric power converted into heat and entering the gas boiler coupled heat pump system; P aux.p is the input power of the heat pump circulation pump; η tr.p The ratio of heat pump circulation pump electrical work converted into heat entering the gas boiler coupled heat pump system.

5. The thermal efficiency testing device for a gas boiler coupled heat pump system according to claim 1, characterized in that: The sensing module includes a first temperature sensor, a second temperature sensor, a first pressure sensor, a flue gas analyzer, a third temperature sensor, a fourth temperature sensor, a first humidity sensor, a first power sensor, a second power sensor, a fifth temperature sensor, a second pressure sensor, a flow sensor, a sixth temperature sensor, a third pressure sensor, and a second humidity sensor; The first temperature sensor is installed on the gas pipeline and is used to collect the temperature of the gas entering the furnace; The second temperature sensor and the first pressure sensor are both installed on the water outlet pipe, the second temperature sensor is used to collect and obtain the outlet water temperature, and the first pressure sensor is used to collect and obtain the outlet water pressure; The flue gas analyzer, the third temperature sensor, the fourth temperature sensor and the first humidity sensor are all installed on the tail flue. The flue gas analyzer is used to analyze the components of the exhaust gas to obtain the exhaust gas component analysis results. The third temperature sensor is used to collect the exhaust gas temperature. The fourth temperature sensor is used to collect the exhaust gas temperature after heating. The first humidity sensor is used to collect the relative humidity of the exhaust gas after heating. The first power sensor and the second power sensor are both installed in the electrical cabinet, the first power sensor is used to collect the input power of the heat pump circulation pump, and the second power sensor is used to collect the input power of the compressor; The fifth temperature sensor, the second pressure sensor and the flow sensor are all installed on the water inlet pipe, the fifth temperature sensor is used to collect the water inlet temperature, the second pressure sensor is used to collect the water inlet pressure, and the flow sensor is used to collect the water inlet flow; The sixth temperature sensor is installed on the air intake pipe, and is used to collect the temperature of the air entering the furnace; The third pressure sensor and the second humidity sensor are both installed outside the gas boiler coupled heat pump system. The third pressure sensor is used to collect and obtain atmospheric pressure, and the second humidity sensor is used to collect and obtain relative air humidity.

6. The thermal efficiency testing device for a gas boiler coupled heat pump system according to claim 1, characterized in that: The gas boiler coupled heat pump system includes a gas boiler, a heat exchanger and a compression heat pump; The gas boiler is used to heat the first hot water output by the compression heat pump using the heat generated by the combustion of gas and air to obtain outlet water and first flue gas; The heat exchanger is used to heat the circulating water using the first flue gas to obtain exhaust flue gas and heated circulating water, and to discharge the exhaust flue gas; The compression heat pump is used to heat the refrigerant using the heated circulating water to obtain circulating water and refrigerant gas, compress the refrigerant gas to obtain heated refrigerant gas, use the heated refrigerant gas to heat the inlet water to obtain refrigerant liquid and first hot water, and cool and decompress the refrigerant liquid to obtain refrigerant.

7. The thermal efficiency testing device for a gas boiler coupled heat pump system according to claim 6, characterized in that: The gas boiler includes a burner fan, a burner, a boiler, and an economizer. The burner fan is used to provide air to the burner. The burner is used to burn gas and air. The boiler is used to use the heat generated by the combustion of gas and air to heat the second hot water output by the economizer to obtain outlet water and second flue gas. The economizer is used to use the second flue gas to heat the first hot water output by the compression heat pump to obtain the first flue gas and the second hot water. The compression heat pump includes a water inlet circulation pump, a heat pump evaporator, a compressor, a heat pump condenser, an expansion valve and a heat pump circulation pump. The water inlet circulation pump is used to provide water to the heat pump condenser. The heat pump evaporator is used to use the heated circulating water to heat the refrigerant to obtain circulating water and refrigerant gas. The compressor is used to compress the refrigerant gas to obtain heated refrigerant gas. The heat pump condenser is used to heat the water inlet with the heated refrigerant gas to obtain refrigerant liquid and first hot water. The expansion valve is used to cool and reduce the pressure of the refrigerant liquid to obtain refrigerant. The heat pump circulation pump is used to provide circulating water to the heat exchanger.

8. A method for testing the thermal efficiency of a gas boiler coupled heat pump system, applied to the thermal efficiency testing device for a gas boiler coupled heat pump system according to any one of claims 1 to 7, characterized in that: The thermal efficiency testing method of the gas boiler coupled heat pump system includes: Obtain thermal efficiency test parameters of a gas boiler coupled heat pump system; the thermal efficiency test parameters include inlet gas temperature, outlet water temperature, outlet water pressure, exhaust gas composition analysis results, exhaust gas temperature, exhaust gas temperature after heating, exhaust gas relative humidity after heating, heat pump circulation pump input power, compressor input power, inlet water temperature, inlet water pressure, inlet water flow rate, inlet air temperature, atmospheric pressure, and relative air humidity; Based on the thermal efficiency test parameters, the thermal efficiency of the gas boiler coupled heat pump system is calculated.

9. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for testing the thermal efficiency of a gas boiler coupled heat pump system according to claim 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for testing the thermal efficiency of a gas boiler coupled heat pump system according to claim 8 is implemented.

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