Method and system for testing operation energy efficiency of building air conditioning unit

Abstract

The invention belongs to the technical field of energy efficiency monitoring, and particularly relates to a building air conditioning unit operation energy efficiency testing method and system.The method comprises the steps that when the building air conditioning unit operation energy efficiency is tested, different load operation states of a building air conditioning unit are firstly simulated, and abnormal working conditions such as extreme weather and sudden power failure can be simulated; meanwhile, when the energy efficiency is calculated, the building air conditioning unit is divided into different operation load intervals according to the operation characteristics of the building air conditioning unit and the operation condition of the building air conditioning unit, and a targeted load adjustment strategy is carried out, so that the energy efficiency of the building air conditioner in different operation states is accurately tested; when the building air conditioning unit is in the partial load operation state, the initial energy efficiency of the building air conditioning unit is firstly calculated, and then the energy consumption of the air conditioner is corrected only according to the operation load of the current air conditioner and the environment temperature, so that the energy efficiency calculation of the building air conditioning unit in the partial load operation state is more accurate.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy efficiency monitoring, and more specifically, relates to a method and system for testing the operating energy efficiency of a building air conditioning unit. Background Art

[0002] Building energy consumption accounts for a quite large proportion in the total energy consumption and has become one of the focuses of global attention. According to relevant data, the total energy consumption of the whole process of buildings in the country in 2020 was 2.27 billion tce, accounting for 45.5% of the total national energy consumption. Among them, in the energy consumption during the building operation stage, as the main component of building energy consumption, the energy consumption of the air conditioning system cannot be underestimated. In public buildings, the energy consumption of the air conditioning system can even be as high as more than 50% of the total building energy consumption. Therefore, accurate testing of the energy efficiency of the air conditioning system is of extremely important significance for achieving building energy conservation.

[0003] At present, although there are already some standards and methods for testing the energy efficiency of air conditioning systems, such as the "Technical Standard for Improving the Energy Efficiency of Heating and Air Conditioning Systems in Public Buildings" and the like, there are still some deficiencies in their actual applications. First of all, this energy efficiency testing method does not consider the operating load of the air conditioning unit, resulting in low accuracy of energy efficiency testing; at the same time, in the existing technology, when the air conditioner operates at part load, there is a lack of an accurate energy efficiency calculation method, which also leads to low accuracy of energy efficiency calculation when the air conditioner operates at part load. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and system for testing the operating energy efficiency of a building air conditioning unit, so as to improve the accuracy of building air conditioning energy efficiency testing.

[0005] To solve the above technical problems, the present invention specifically provides the following technical solutions: A method for testing the operating energy efficiency of a building air conditioning unit specifically includes the steps of: S1: Adjust the operating load of the building air conditioning unit to control the building air conditioning unit to enter different load operating states; S2: Collect the environmental parameter data and air conditioning unit data of the building air conditioning unit under different loads; S3: Perform data preprocessing operations on the environmental parameter data and air conditioning unit data of the building air conditioning unit under different loads to obtain the preprocessed environmental parameter data and air conditioning unit data; S4: Calculate the energy efficiency of the building air conditioning unit under different operating loads according to the preprocessed environmental parameter data and air conditioning unit data; S5: Form a test report of the building air conditioning unit according to the final energy efficiency of the building air conditioning unit.

[0006] Preferably, in S1, the adjustment range of the operating load of the building air-conditioning unit is from 30% of the rated load to 110% of the rated load. Specifically, S1 is as follows: The adjustment range is divided into different intervals, and different adjustment strategies are adopted for different intervals to achieve load adjustment.

[0007] Preferably, according to the historical operating energy efficiency fluctuation of the building air-conditioning unit, the adjustment range is divided into a first load operating interval and a second load operating interval. The adjustment range of the first load operating interval is from 30% of the rated load to 80% of the rated load, and the adjustment range of the second load operating interval is from 80% of the rated load to 110% of the rated load.

[0008] Preferably, for the first load operating interval, the adjustment strategy is that the load adjustment step is 3%; for the second load operating interval, the adjustment strategy is that the load adjustment step is 5%.

[0009] Preferably, S4 is specifically as follows: When the building air-conditioning unit operates in the first load operating interval, the energy efficiency of the building air-conditioning unit is calculated by using the first air-conditioning energy efficiency calculation method; when the building air-conditioning unit operates in the second load operating interval, the energy efficiency of the building air-conditioning unit is calculated by using the second air-conditioning energy efficiency calculation method.

[0010] Preferably, the first air-conditioning energy efficiency calculation method is specifically as follows: S4.a: Calculate the initial energy efficiency of the building air-conditioning unit; Among them, the initial energy efficiency The calculation formula is: ; , In the formula, is the cooling capacity of the building air-conditioning unit under different operating loads is the compressor input power, is the water pump power, is the fan power, ρ is the refrigerant fluid density in the building air-conditioning unit, is the refrigerant specific heat capacity in the building air-conditioning unit, ΔT is the supply and return water temperature difference, F is the flow rate in the building air-conditioning unit; S4.b: Correct the initial energy efficiency of the building air-conditioning unit according to the operating load of the building air-conditioning unit to obtain the energy efficiency of the building air-conditioning unit after the first correction; Specifically, the formula for the first correction is: ; In the formula, is the energy efficiency of the building air-conditioning unit after the first correction, is the characteristic coefficient of the building air-conditioning unit, which is obtained through factory calibration, and PR is the operating load of the current building air-conditioning unit; S4.c: Perform a second correction on the energy efficiency of the building air-conditioning unit after the first correction according to the ambient temperature to obtain the final energy efficiency of the building air-conditioning unit; Among them, the formula for the second correction is: ; In the formula, is the final energy efficiency of the building air-conditioning unit, is the temperature sensitivity coefficient, and T is the ambient temperature value.

[0011] Preferably, the second air-conditioning energy efficiency calculation method is: Calculate the initial energy efficiency of the building air-conditioning unit; Among them, the initial energy efficiency The calculation formula is: ; , In the formula, is the refrigerating capacity of the building air-conditioning unit under different operating loads is the compressor input power, is the pump power, is the fan power, ρ is the refrigerant fluid density in the building air-conditioning unit, is the refrigerant specific heat capacity in the building air-conditioning unit, ΔT is the supply and return water temperature difference, and F is the flow rate in the building air-conditioning unit; Take the initial energy efficiency as the final energy efficiency of the building air-conditioning unit.

[0012] Preferably, an electric control valve and a variable frequency pump group control system are used to adjust the operating load of the building air-conditioning unit; among them, the electric control valve is a Belimo LR24A-SR valve with an opening of 0.1%, and it receives PLC instructions through the Modbus RTU protocol to achieve load adjustment, Using the variable frequency pump group control system to adjust the operating load of the building air-conditioning unit specifically means: configuring an ABB ACS880 frequency converter for each pump, with a frequency adjustment step of 0.1 Hz, to achieve precise flow control, and then achieve the adjustment of the operating load of the building air-conditioning unit.

[0013] Preferably, in S2, the preprocessing operation includes data cleaning and data denoising.

[0014] According to another aspect of the present invention, a building air-conditioning unit operating energy efficiency test system is provided. The system uses the above-mentioned building air-conditioning unit operating energy efficiency test method, and the system further includes: A load regulation module for regulating the operating load of the building air-conditioning unit, thereby controlling the building air-conditioning unit to enter different load operating states; A data acquisition module for collecting environmental parameter data and air-conditioning unit data of the building air-conditioning unit under different loads; A data preprocessing module for performing data preprocessing operations on the environmental parameter data and air-conditioning unit data of the building air-conditioning unit under different loads to obtain preprocessed environmental parameter data and air-conditioning unit data; An energy efficiency calculation module for calculating the energy efficiency of the building air-conditioning unit under different operating loads according to the preprocessed environmental parameter data and air-conditioning unit data; A test report generation module for generating a test report of the building air-conditioning unit according to the final energy efficiency of the building air-conditioning unit.

[0015] The present invention has the following beneficial effects compared with the prior art: When testing the operating energy efficiency of a building air-conditioning unit, the present invention first simulates different load operating states of the building air-conditioning unit, thereby realizing support for various disturbance modes such as step, ramp, and sine, and can simulate abnormal conditions such as extreme weather and sudden power outages; at the same time, when calculating the energy efficiency, according to the operating characteristics of the building air-conditioning unit and the operating conditions of the building air-conditioning unit, the building air-conditioning unit is divided into different load operating intervals, and targeted load regulation strategies are carried out, thereby realizing accurate testing of the energy efficiency of the building air-conditioning under different operating states; When the building air-conditioning unit is in a partial load operating state, first calculate the initial energy efficiency of the building air-conditioning unit, and then only correct the air-conditioning energy consumption according to the current operating load and environmental temperature of the air-conditioning, so that the energy efficiency calculation of the building air-conditioning unit in the partial load operating state is more accurate. Description of the Drawings

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0017] Figure 1 It is a flowchart of a method for testing the operating energy efficiency of a building air-conditioning unit provided by an embodiment of the present invention; Figure 2 It is a flowchart of calculating the energy efficiency of the building air-conditioning unit by using the first air-conditioning energy efficiency calculation method provided by an embodiment of the present invention. Detailed Embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] First, the concepts involved in this application will be described in conjunction with the accompanying drawings. It should be noted here that the following descriptions of each concept are only for making the content of this application easier to understand, and do not represent a limitation on the protection scope of this application; at the same time, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Next, this application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0020] As Figure 1 shown, the present invention provides a method for testing the operating energy efficiency of a building air-conditioning unit, which specifically includes the steps: S1: Adjust the operating load of the building air-conditioning unit to control the building air-conditioning unit to enter different load operating states; Among them, in this step, the adjustment range of the operating load of the building air-conditioning unit is from 30% rated load to 110% rated load; In this step, an electric control valve and a variable-frequency water pump group control system are used to adjust the operating load of the building air-conditioning unit; among them, the electric control valve is a Belimo LR24A-SR valve with an opening of 0.1%, and it receives PLC instructions through the Modbus RTU protocol to achieve load adjustment. Using the variable-frequency water pump group control system to adjust the operating load of the building air-conditioning unit specifically means: configuring an ABB ACS880 frequency converter for each water pump, with a frequency adjustment step of 0.1 Hz, to achieve precise flow control, and then achieve the adjustment of the operating load of the building air-conditioning unit.

[0021] In this embodiment, by setting the electric control valve and the variable-frequency group control system, precise adjustment of the operating load of the building air-conditioning unit is achieved, thereby supporting various disturbance modes such as step, ramp, and sine, and abnormal working conditions such as extreme weather and sudden power outages can be simulated.

[0022] Furthermore, S1 is specifically: dividing the adjustment range into different intervals, and adopting different adjustment strategies for different intervals to achieve load adjustment; Specifically, according to the historical operating energy efficiency fluctuations of the building air-conditioning unit, the adjustment range is divided into a first load operating range and a second load operating range, the adjustment range of the first load operating range is 30% of the rated load to 80% of the rated load, and the adjustment range of the second load operating range is 80% of the rated load to 110% of the rated load; Among them, for the first load operation interval, the adjustment strategy is that the load adjustment step is 3%; for the second load operation interval, the adjustment strategy is that the load adjustment step is 5%; When the building air-conditioning unit is in the first load operation range, since the air-conditioning unit is in a partial load operation state at this time, the air-conditioning unit at this time is more likely to have low energy efficiency problems compared to the air-conditioning unit operating close to full rated load. Therefore, this embodiment divides the building air-conditioning unit into different load operation ranges according to the operating conditions of the building air-conditioning unit, thereby realizing accurate energy efficiency testing of the building air-conditioning under different operating conditions.

[0023] S2: Collecting environmental parameter data and air conditioning unit data of the building air conditioning unit under different loads; Wherein, the environmental parameter data includes temperature data of multiple points in the operating area of ​​the building air conditioning unit; Temperature sensors should be installed at multiple points in the operating area of ​​the building's air-conditioning units. These sensors should be arranged according to a certain spatial distribution pattern (for example, they should be installed in a dispersed manner) to ensure that they can fully reflect the actual operating environment of the air-conditioning units. At the same time, the average temperature collected by different temperature sensors should be used as the environmental parameter data of the air-conditioning.

[0024] The air conditioning unit data includes the operating power, cooling capacity, supply and return water temperature difference, refrigerant flow rate, etc. of different equipment in the air conditioner; Specifically, the air-conditioning unit data may be acquired through a control system of the air-conditioning unit itself or a building automation system connected to the air-conditioning unit.

[0025] Furthermore, in this step, since a large amount of data is obtained, it is necessary to synchronize the data. Specifically, after different sensors collect environmental parameter data or air conditioning unit data, the IEEE 1588 Precision Time Protocol (PTP) is used to achieve microsecond-level clock synchronization. The main clock source uses the Meinberg M600 GPS synchronizer. At the same time, a test data timestamp index is established to ensure that the environmental parameter data or air conditioning unit data are time-aligned; Specifically, the time deviation is <10ms.

[0026] S3: preprocessing the environmental parameter data and air conditioning unit data of the building air conditioning unit under different loads to obtain preprocessed environmental parameter data and air conditioning unit data; Among them, the preprocessing operations include data cleaning, data denoising, etc.; The data cleaning is to remove the invalid data in the environmental parameter data and the air-conditioning unit data. In this embodiment, for the invalid data types that often appear in the data acquisition stage, three invalid data types of over-range data, mutation jump, and communication interruption are listed; specifically, see Table 1. Table 1 shows the determination conditions and processing methods for the three invalid data types of over-range data, mutation jump, and communication interruption; Table 1 Determination Conditions and Processing Methods for Three Invalid Data Types

[0027] The data denoising is mainly used to remove the noise caused by electromagnetic interference, mechanical vibration, etc. Specifically, wavelet threshold denoising is used to perform denoising operations on the environmental parameter data and the air-conditioning unit data; Specifically, the db4 wavelet basis function is used for data denoising operations.

[0028] S4: Calculate the energy efficiency of the building air-conditioning unit under different operating loads according to the preprocessed environmental parameter data and air-conditioning unit data; Among them, the S4 is specifically: When the building air-conditioning unit operates in the first load operation range, the first air-conditioning energy efficiency calculation method is used to calculate the energy efficiency of the building air-conditioning unit; when the building air-conditioning unit operates in the second load operation range, the second air-conditioning energy efficiency calculation method is used to calculate the energy efficiency of the building air-conditioning unit Among them, as Figure 2 shown, the first air-conditioning energy efficiency calculation method is specifically: S4.a: Calculate the initial energy efficiency of the building air-conditioning unit; Among them, the initial energy efficiency The calculation formula is: ; , In the formula, is the cooling capacity of the building air-conditioning unit under different operating loads is the compressor input power, is the pump power, is the fan power, ρ is the refrigerant fluid density in the building air-conditioning unit, is the refrigerant specific heat capacity in the building air-conditioning unit, ΔT is the supply and return water temperature difference, and F is the flow rate in the building air-conditioning unit; S4.b: Correct the initial energy efficiency of the building air-conditioning unit according to the operating load of the building air-conditioning unit to obtain the energy efficiency of the building air-conditioning unit after the first correction; Specifically, the formula for the first correction is as follows: ; In the formula, is the energy efficiency of the building air-conditioning unit after the first correction, is the characteristic coefficient of the building air-conditioning unit, obtained through factory calibration, and PR is the operating load of the current building air-conditioning unit; S4.c: Perform a second correction on the energy efficiency of the building air-conditioning unit after the first correction according to the ambient temperature to obtain the final energy efficiency of the building air-conditioning unit; Among them, the formula for the second correction is as follows: ; In the formula, is the final energy efficiency of the building air-conditioning unit, is the temperature sensitivity coefficient, which is -0.03 / °C in this embodiment, and T is the ambient temperature value; In this embodiment, when the building air-conditioning unit is operating at part load, this embodiment first calculates the initial energy efficiency of the building air-conditioning unit, and then corrects the air-conditioning energy consumption only according to the operating load and ambient temperature of the current air conditioner, so that the energy efficiency calculation of the building air-conditioning unit in the part-load operating state is more accurate.

[0029] Among them, the second air-conditioning energy efficiency calculation method is as follows: Calculate the initial energy efficiency of the building air-conditioning unit; Among them, the initial energy efficiency The calculation formula is as follows: ; , In the formula, is the cooling capacity of the building air-conditioning unit under different operating loads is the compressor input power, is the pump power, is the fan power, ρ is the density of the refrigerant fluid in the building air-conditioning unit, is the specific heat capacity of the refrigerant in the building air-conditioning unit, ΔT is the supply-return water temperature difference, and F is the flow rate in the building air-conditioning unit; Take the initial energy efficiency as the final energy efficiency of the building air-conditioning unit.

[0030] S5: Form a test report for the building air-conditioning unit according to the final energy efficiency of the building air-conditioning unit.

[0031] Embodiment 2, this embodiment further includes a building air-conditioning unit operating energy efficiency test system. The system adopts the building air-conditioning unit operating energy efficiency test method of Embodiment 1, and the system further includes: A load adjustment module, which is used to adjust the operating load of the building air conditioner unit, so as to control the air conditioner unit to enter different load operating states; A data acquisition module, which is used to acquire the environmental parameter data and air conditioner unit data of the building air conditioner unit under different loads; A data preprocessing module, which is used to perform data preprocessing operations on the environmental parameter data and air conditioner unit data of the building air conditioner unit under different loads, and obtain the preprocessed environmental parameter data and air conditioner unit data; An energy efficiency calculation module, which is used to calculate the energy efficiency of the building air conditioner unit under different operating loads according to the preprocessed environmental parameter data and air conditioner unit data; A test report generation module, which is used to form a test report of the building air conditioner unit according to the final energy efficiency of the building air conditioner unit.

[0032] Embodiment 3. This embodiment includes an electronic device, which includes a processor and a memory. A program or instruction that can run on the processor is stored on the memory. When the program or instruction is executed by the processor, it realizes each step of the method for testing the operating energy efficiency of the building air conditioner unit in Embodiment 1, and can achieve the same technical effect.

[0033] Embodiment 4. This embodiment includes a computer-readable storage medium. A data processing program is stored on the computer-readable storage medium. The data processing program is executed by the processor to implement each step of the method for testing the operating energy efficiency of the building air conditioner unit in Embodiment 1.

[0034] Those skilled in the art should understand that the embodiments herein can be provided as a method, a device (equipment), or a computer program product. Therefore, the embodiments herein can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Including but not limited to RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cassette, tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, a communication medium generally includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0035] This text is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (devices), and computer program products according to the embodiments of the present text. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in the process Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0036] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the steps of the functions specified in the process Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0037] The above-described embodiments and / or implementation manners are only used to illustrate the preferred embodiments and / or implementation manners for implementing the technology of the present invention, and do not impose any formal restrictions on the implementation manners of the technology of the present invention. Any person skilled in the art, without departing from the scope of the technical means disclosed in the content of the present invention, can make some changes or modifications to other equivalent embodiments, but should still be regarded as the same technology or embodiment as the essence of the present invention. Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for testing the energy efficiency of a building air conditioning unit, characterized in that: The specific steps include: S1: adjusting the operating load of the building air conditioning unit, thereby controlling the building air conditioning unit to enter different load operating states; S2: Collecting environmental parameter data and air conditioning unit data of the building air conditioning unit under different loads; S3: performing data preprocessing operations on the environmental parameter data and air conditioning unit data of the building air conditioning unit under different loads to obtain preprocessed environmental parameter data and air conditioning unit data; S4: Calculating the energy efficiency of the building air conditioning unit under different operating loads according to the preprocessed environmental parameter data and air conditioning unit data; S5: Forming a building air conditioning unit test report according to the final energy efficiency of the building air conditioning unit.

2. The building air conditioning unit operation energy efficiency test method according to claim 1 is characterized in that: In S1, the adjustment range of the operating load of the building air-conditioning unit is 30% of the rated load to 110% of the rated load. Specifically, S1 is as follows: the adjustment range is divided into different intervals, and different adjustment strategies are adopted for different intervals to realize load adjustment.

3. The method for testing the energy efficiency of building air conditioning units according to claim 2, characterized in that: According to the historical operating energy efficiency fluctuations of the building air-conditioning unit, the adjustment range is divided into a first load operating range and a second load operating range. The adjustment range of the first load operating range is 30% of the rated load to 80% of the rated load, and the adjustment range of the second load operating range is 80% of the rated load to 110% of the rated load.

4. The method for testing the energy efficiency of a building air conditioning unit according to claim 3, characterized in that: For the first load operation interval, the regulation strategy is a load regulation step of 3%; for the second load operation interval, the regulation strategy is a load regulation step of 5%.

5. The method for testing the energy efficiency of a building air conditioning unit according to claim 1, characterized in that: The S4 is specifically: When the building air-conditioning unit operates in a first load operating range, the energy efficiency of the building air-conditioning unit is calculated using a first air-conditioning energy efficiency calculation method; when the building air-conditioning unit operates in a second load operating range, the energy efficiency of the building air-conditioning unit is calculated using a second air-conditioning energy efficiency calculation method.

6. The method for testing the energy efficiency of a building air conditioning unit according to claim 5, characterized in that: The first air conditioning energy efficiency calculation method is specifically as follows: S4.a: Calculate the initial energy efficiency of the air conditioning unit of the building; Among them, the initial energy efficiency The calculation formula is: ; , In the formula, The cooling capacity of the building air conditioning unit under different operating loads is the compressor input power, is the water pump power, is the fan power, ρ is the density of the refrigerant fluid in the building air conditioning unit, is the specific heat capacity of the refrigerant in the building air conditioning unit, ΔT is the supply and return water temperature difference, and F is the flow rate in the building air conditioning unit; S4.b: Correcting the initial energy efficiency of the building air-conditioning unit according to the operating load of the building air-conditioning unit to obtain the energy efficiency of the building air-conditioning unit corrected for the first time; Among them, the formula of the first correction is: ； In the formula, The first revision of the energy efficiency of building air conditioning units, is the characteristic coefficient of the building air-conditioning unit, R is the operating load of the current building air-conditioning unit; S4.c: Perform a second correction on the energy efficiency of the building air-conditioning unit corrected for the first time according to the ambient temperature to obtain the final energy efficiency of the building air-conditioning unit; The second corrected formula is: ； In the formula, For the final energy efficiency of building air conditioning units, is the temperature sensitivity coefficient, and T is the ambient temperature value.

7. The method for testing the energy efficiency of a building air conditioning unit according to claim 5 or 6, characterized in that: The second air conditioning energy efficiency calculation method is: Calculating the initial energy efficiency of the building air conditioning unit; Among them, the initial energy efficiency The calculation formula is: In the formula, The cooling capacity of the building air conditioning unit under different operating loads is the compressor input power, is the water pump power, is the fan power, ρ is the density of the refrigerant fluid in the building air conditioning unit, is the specific heat capacity of the refrigerant in the building air conditioning unit, ΔT is the supply and return water temperature difference, and F is the flow rate in the building air conditioning unit; The initial energy efficiency is taken as the final energy efficiency of the building air conditioning unit.

8. The method for testing the energy efficiency of a building air conditioning unit according to claim 1, characterized in that: In S1, an electric regulating valve and a variable frequency water pump group control system are used to adjust the operating load of the building air conditioning unit; Among them, the electric regulating valve is a Belimo LR24A-SR valve with an opening of 0.1%. It receives PLC instructions through the Modbus RTU protocol to achieve load regulation, and uses a variable frequency water pump group control system to adjust the operating load of the building air-conditioning unit. Specifically, an ABB ACS880 frequency converter is configured for each water pump, with a frequency adjustment step of 0.1Hz to achieve precise flow control, thereby achieving operating load regulation of the building air-conditioning unit.

9. The method for testing the energy efficiency of a building air conditioning unit according to claim 1, characterized in that: In S2, the preprocessing operation includes data cleaning and data denoising.

10. A building air conditioning unit operation energy efficiency test system, characterized in that: The system adopts a building air conditioning unit operation energy efficiency test method according to any one of claims 1 to 9, and the system comprises: A load adjustment module, used to adjust the operating load of the building air conditioning unit, so as to control the building air conditioning unit to enter different load operating states; A data acquisition module, used to collect environmental parameter data and air conditioning unit data of the building air conditioning unit under different loads; A data preprocessing module, used to perform data preprocessing operations on the environmental parameter data and air conditioning unit data of the building air conditioning unit under different loads to obtain preprocessed environmental parameter data and air conditioning unit data; An energy efficiency calculation module, used to calculate the energy efficiency of the building air conditioning unit under different operating loads according to the pre-processed environmental parameter data and air conditioning unit data; The test report generating module is used to generate a test report of the building air conditioning unit according to the final energy efficiency of the building air conditioning unit.

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