A method and system for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room.

Abstract

This invention discloses a method and system for rapidly and accurately measuring the annual operating energy efficiency ratio (EER) of a chiller room. The method includes: retrieving and calculating the local average temperature (Tav) over the past three years; rounding up Tav to set it as the ambient test temperature (Test); selecting a typical week for testing during stable operation of the chiller room system and estimating the average temperature (Tweek) for that week; collecting and storing typical week operating data if Tweek ≥ Tav; verifying the actual average temperature of the typical week; and only when the actual average temperature of the typical week ≥ the set ambient test temperature, processing and analyzing the collected data to calculate the typical week operating energy efficiency, which is used to approximate the actual annual operating energy efficiency value of the chiller room; if the condition that the actual average temperature of the typical week is greater than or equal to the set ambient test temperature is not met, reselecting the typical week for measurement and re-testing the energy efficiency. This invention can significantly shorten the measurement cycle and ensure the reliability of the test results, greatly improving the efficiency of measurement and evaluation.

Description

Technical Field

[0001] This invention relates to the field of centralized air conditioning refrigeration room systems, and more specifically, to a method and system for rapidly and accurately measuring the annual operating energy efficiency ratio of a refrigeration room. Background Technology

[0002] With the escalating energy crisis, energy-efficient and low-carbon retrofitting of buildings has become increasingly urgent. Refrigeration room systems, as a crucial component of building energy consumption, possess significant energy-saving potential.

[0003] The prerequisite for improving and upgrading the energy efficiency of a refrigeration room system is the ability to conduct an objective and accurate quantitative assessment of its energy efficiency. However, the current energy efficiency monitoring methods used in engineering projects suffer from excessively long monitoring cycles or low reliability of monitoring results, which is not conducive to the rapid and efficient promotion of refrigeration room system upgrades and the construction of high-efficiency refrigeration rooms.

[0004] According to current standards such as the "Standard for Energy Efficiency Monitoring and Evaluation of Centralized Air Conditioning Refrigeration Room Systems" (DBJ / T 15-129) and the "Technical Specification for High-Efficiency Refrigeration Rooms" (T / CECS 1012), the annual operating energy efficiency ratio (EERa) should be used to evaluate the energy efficiency of refrigeration room systems. This means that at least one full year of operating data for the refrigeration room should be monitored. Furthermore, the "Standard for Energy Conservation Testing of Public Buildings" (JGJ / T 1778.6.2) stipulates that under testing conditions, readings should be taken every (5-10) minutes for 60 minutes. The average value of each reading should be taken as the test value, and the calculated operating energy efficiency ratio should be approximated as the annual average operating energy efficiency ratio.

[0005] Comparing the two existing monitoring requirements, Method 1 spans the entire cooling season, resulting in a long testing cycle and requiring accurate and reliable monitoring data. Method 2 only conducts energy efficiency tests under testing conditions, where the system load should not be less than 60% of the actual maximum operating load, and the operating unit load should not be less than 80% of its rated load. The testing conditions are relatively strict and do not fully consider the energy efficiency of the refrigeration room system under different load conditions.

[0006] There is currently no effective solution to the above problems. Summary of the Invention

[0007] This invention provides a method and system for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room. By setting the test environment temperature, measuring typical weekly operating data of the chiller room, and analyzing and calculating the approximate annual operating energy efficiency value of the chiller room, the method can be used to evaluate and manage the energy efficiency of the chiller room system. This can shorten the measurement cycle and improve the reliability and accuracy of the test results.

[0008] According to a first aspect of the present invention, a method for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room is disclosed, comprising: Analyze the chiller room system to understand its system type, equipment parameters, piping connections, and other information; set up and install data acquisition and storage devices and systems for the chiller room system. Calculate and obtain the local average outdoor temperature Tav (°C) over the past 3 years, and set the ambient temperature Ttest (°C) based on Tav. During the stable operation of the chiller room system, a typical week was selected for measurement, and the average outdoor temperature Tweek for the typical week was assessed based on meteorological forecasts and historical meteorological data. 评估 (°C) level, calculate Tweek 评估 value; When Tweek 评估 When the temperature reaches ≥Ttest (°C), typical weekly continuous operation data of the refrigeration room system is collected and stored. The actual outdoor average temperature Tweek of a typical week 实际 Calculations are performed using (°C), assuming the typical weekly actual outdoor temperature Tweek. 实际 Not satisfied with Tweek 实际 If the temperature is ≥Ttest(°C), repeat the above steps; otherwise, proceed to the next step. Based on the collected operational data, the total cooling capacity and total power consumption of the chiller room system in a typical week are calculated, and the energy efficiency ratio (EERweek) of the chiller room in a typical week is calculated. The calculated typical weekly energy efficiency ratio (EERweek) of the chiller room is used to replace the annual energy efficiency ratio (EERa) of the chiller room system for energy efficiency evaluation and management.

[0009] Preferably, the method for calculating and obtaining the local average outdoor temperature Tav (°C) over the past 3 years, and setting the measured ambient temperature Ttest (°C) based on Tav, is as follows: Retrieve local meteorological data parameters for the past three years; Based on meteorological data parameters, the local average outdoor temperature Tav (°C) for the past three years was calculated; The ambient temperature Ttest (°C) was calculated by rounding up from the local average outdoor temperature Tav (°C) for the past three years. The expression for calculating the ambient temperature Ttest (°C) using the outdoor average temperature Tav (°C) is: Ttest = ⌈Tav⌉ (°C).

[0010] Preferably, the method for calculating the typical weekly total cooling capacity and total power consumption of the chiller room system based on the collected operational data, and for calculating the typical weekly energy efficiency ratio (EERweek) of the chiller room, is as follows: Calculate the total cooling capacity Qweek (kWh) and total power consumption Nweek (kWh) of the chiller room system during a typical week. Then, the ratio of the typical weekly total cooling capacity Qweek (kWh) to the typical weekly total power consumption Nweek (kWh) is calculated using the formula to obtain the typical weekly energy efficiency ratio (EERweek) of the chiller room. The calculation formula is: Qweek = c × m × Δt; EERweek = Qweek / Nweek; In the formula, c refers to the specific heat capacity of water (kJ / (kg / ℃)), m refers to the flow rate of chilled water pipeline (kg / s), and Δt refers to the temperature difference between chilled water supply and return (℃).

[0011] Preferably, the method of replacing the annual operating energy efficiency ratio (EERa) of the chiller room system with the calculated typical weekly operating energy efficiency ratio (EERweek) for energy efficiency evaluation and management of the chiller room system is as follows: Using the formula: Qyear=c×m×Δt, the annual cooling capacity of the refrigeration room, Qyear (kWh), can be calculated. Based on the collected data, the total annual power consumption of the chiller room, Nyear (kWh), was calculated. Based on the annual cooling capacity Qyear (kWh) and total power consumption Nyear (kWh) of the chiller room, the annual operating energy efficiency ratio of the chiller room system can be calculated using the formula: ERa=Qyear / Nyear. Based on the typical weekly operating energy efficiency ratio and the actual annual operating energy efficiency ratio, calculate the deviation rate (E) between the typical weekly operating energy efficiency ratio and the actual annual operating energy efficiency ratio. The calculation formula is as follows: E=(EERweek-EERa) / EERa×100%; Based on the deviation rate between the typical weekly operating energy efficiency ratio and the actual annual operating energy efficiency ratio, the number of deviation rates P±10% in all measurable typical EERweeks within the ±10% allowable deviation range of the project is calculated; Calculate the total number of typical EERweeks that can be measured under test requirements during the stable operation of the chiller room system. P ; Using the formula: R = P ± 10% / P × 100%, calculate the guarantee rate (R) of the deviation rate (E) between the typical weekly operating energy efficiency ratio and the actual annual operating energy efficiency ratio within the ±10% allowable deviation range of the project. Based on the obtained guarantee rate, the energy efficiency of the chiller room system is evaluated and managed.

[0012] According to a second aspect of the present invention, a system for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room is disclosed, comprising: The analysis unit analyzes the refrigeration room system to understand information such as system type, equipment parameters, and piping connections, and sets up and installs data acquisition and storage devices and systems for the refrigeration room system. The unit is set to calculate and obtain the local average outdoor temperature Tav (°C) over the past 3 years, and the ambient temperature Ttest (°C) is set based on Tav. The first calculation unit selects a typical week for measurement during the stable operation of the chiller room system, and evaluates the typical week's average outdoor temperature Tweek based on meteorological forecasts and historical meteorological data. 评估 (°C) level, calculate Tweek 评估 value; Acquisition unit, when Tweek 评估 When the temperature reaches ≥Ttest (°C), typical weekly continuous operation data of the refrigeration room system is collected and stored. The judgment unit is based on the actual outdoor average temperature Tweek of a typical week. 实际 Calculations are performed using (°C), assuming the typical weekly actual outdoor temperature Tweek. 实际 Not satisfied with Tweek 实际 If the temperature is ≥Ttest(°C), repeat the above steps; otherwise, proceed to the next step. The second calculation unit calculates the total cooling capacity and total power consumption of the chiller room system in a typical week by collecting the operating data, and calculates the energy efficiency ratio (EERweek) of the chiller room in a typical week. The evaluation unit replaces the annual operating energy efficiency ratio (EERa) of the chiller room system with the calculated typical weekly operating energy efficiency ratio (EERweek) for the energy efficiency evaluation and management of the chiller room system.

[0013] According to another aspect of the present invention, a computing device is also provided, the computing device comprising: at least one processor, a memory, and an input / output unit; wherein the memory is used to store a computer program, and the processor is used to call the computer program stored in the memory to execute the above-described method for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room.

[0014] According to another aspect of the present invention, a computer-readable storage medium is also provided, which includes instructions that, when executed on a computer, cause the computer to perform the above-described method for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room.

[0015] In this embodiment of the invention, by setting a constraint value of the environmental test temperature Ttest, the time required to collect refrigeration room operation data, which originally required collecting data for a whole year, is shortened to one typical week. Furthermore, compared to the standard 60-minute continuous testing method, this testing method and system more comprehensively considers the impact of partial load rate and personnel activity patterns on the energy efficiency of the refrigeration room, resulting in stronger data credibility and interpretability, and more reliable test results. Compared to the year-round testing method, it significantly improves the efficiency of refrigeration room energy efficiency testing and reduces the input of manpower and resources. Compared to the 60-minute continuous testing method, its typical weekly test energy efficiency ratio is within the allowable deviation range of 10%, further ensuring the reliability and accuracy of test results, which is conducive to promoting energy-saving renovation of refrigeration room systems and the construction of high-efficiency refrigeration rooms. Therefore, this invention can greatly shorten the measurement cycle and ensure the reliability of test results, significantly improving measurement and evaluation efficiency. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram illustrating the implementation process of a method for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room according to an embodiment of the present invention. Figure 2 This is a schematic diagram of a system for rapidly and accurately measuring the annual operating energy efficiency ratio of a refrigeration room according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the data acquisition and transmission system architecture according to an embodiment of the present invention; Figure 4 This is a typical data acquisition point layout diagram for a refrigeration room system according to an embodiment of the present invention; Figure 5 A schematic diagram of the structure of a medium according to an embodiment of the present invention is shown. Figure 6 A schematic diagram of the structure of a computing device according to an embodiment of the present invention is shown. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0019] The following is for reference. Figure 1 , Figure 1 This is a schematic diagram illustrating the implementation process of a method for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room, as provided in one embodiment of the present invention. It should be noted that the embodiments of the present invention can be applied to any applicable scenario.

[0020] Figure 1 The diagram shown illustrates a method for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room, as provided in an embodiment of the present invention. The method includes: Analyze the chiller room system to understand its system type, equipment parameters, piping connections, and other information; set up and install data acquisition and storage devices and systems for the chiller room system. In this embodiment of the invention, the data acquisition and storage device for the refrigeration room system and the system's data acquisition device are connected to an industrial data gateway to collect real-time operating data of the system. The data is then uploaded to a data cloud server for storage via the data gateway, allowing PCs to access, view, and analyze the data in real time. Data is collected and uploaded every 5-15 minutes.

[0021] Calculate and obtain the local average outdoor temperature Tav (°C) over the past 3 years, and set the ambient temperature Ttest (°C) based on Tav. In this embodiment of the invention, the ambient temperature Ttest (°C) is the reference value of the ambient temperature required for collecting operating data of the refrigeration room system. Only when the average temperature during the data collection period of the refrigeration room system is greater than or equal to the ambient temperature Ttest (°C) is the collected data valid.

[0022] During the stable operation of the chiller room system, a typical week was selected for measurement, and the average outdoor temperature Tweek for the typical week was assessed based on meteorological forecasts and historical meteorological data. 评估 (°C) level, calculate Tweek 评估 value; In this embodiment of the invention, a typical week is any consecutive 7 days during the stable operation phase of the chiller room system, and the average temperature of the typical week is Tweek. 评估 The average dry-bulb temperature for a specific typical week is calculated based on the outdoor average dry-bulb temperature data published by the meteorological authorities. This shortens the time frame from collecting refrigeration room operation data for the entire year to just one typical week. It more comprehensively considers the impact of partial load factor and personnel activity patterns on the energy efficiency of refrigeration rooms, resulting in more reliable and interpretable data and more reliable test results.

[0023] When Tweek 评估 When the temperature reaches ≥Ttest (°C), typical weekly continuous operation data of the refrigeration room system is collected and stored. The actual outdoor average temperature Tweek of a typical week 实际 Calculations are performed using (°C), assuming the typical weekly actual outdoor temperature Tweek. 实际 Not satisfied with Tweek 实际 If the temperature is ≥Ttest(°C), repeat the above steps; otherwise, proceed to the next step. Based on the collected operational data, the total cooling capacity and total power consumption of the chiller room system in a typical week are calculated, and the energy efficiency ratio (EERweek) of the chiller room in a typical week is calculated. In this embodiment of the invention, the energy efficiency ratio of the chiller room is calculated using typical weekly tests. Compared with the year-round testing method, this greatly improves the energy efficiency testing efficiency of the chiller room and reduces the input of manpower and material resources.

[0024] The calculated typical weekly energy efficiency ratio (EERweek) of the chiller room is used to replace the annual energy efficiency ratio (EERa) of the chiller room system for energy efficiency evaluation and management.

[0025] In this embodiment of the invention, the typical weekly operating energy efficiency ratio (EERweek) of the chiller room is used instead of the annual operating energy efficiency ratio (EERa) of the chiller room system. Compared with the 60-minute continuous testing method, the typical weekly test energy efficiency ratio is within the allowable deviation range of 10% in engineering, which can better ensure the reliability and accuracy of the test results. This is conducive to promoting the energy-saving transformation of chiller room systems and the construction of high-efficiency chiller rooms.

[0026] The calculation obtains the local average outdoor temperature Tav (°C) for the past 3 years. The method for setting the measured ambient temperature Ttest (°C) based on Tav is as follows: Retrieve local meteorological data parameters for the past three years; Based on meteorological data parameters, the local average outdoor temperature Tav (°C) for the past three years was calculated; The ambient temperature Ttest (°C) was calculated by rounding up from the local average outdoor temperature Tav (°C) for the past three years. The expression for calculating the ambient temperature Ttest (°C) using the outdoor average temperature Tav (°C) is: Ttest = ⌈Tav⌉ (°C).

[0027] The method for calculating the typical weekly total cooling capacity and total power consumption of the chiller room system based on the collected operational data, and for calculating the typical weekly energy efficiency ratio (EERweek) of the chiller room, is as follows: Calculate the total cooling capacity Qweek (kWh) and total power consumption Nweek (kWh) of the chiller room system during a typical week. Then, the ratio of the typical weekly total cooling capacity Qweek (kWh) to the typical weekly total power consumption Nweek (kWh) is calculated using the formula to obtain the typical weekly energy efficiency ratio (EERweek) of the chiller room. The calculation formula is: Qweek = c × m × Δt; EERweek = Qweek / Nweek; In the formula, c refers to the specific heat capacity of water (kJ / (kg / ℃)), m refers to the flow rate of chilled water pipeline (kg / s), and Δt refers to the temperature difference between chilled water supply and return (℃).

[0028] The calculated typical weekly energy efficiency ratio (EERweek) of the chiller room is used instead of the annual energy efficiency ratio (EERa) of the chiller room system for energy efficiency evaluation and management. Specifically, this method is as follows: Using the formula: Qyear=c×m×Δt, the annual cooling capacity of the refrigeration room, Qyear (kWh), can be calculated. Based on the collected data, the total annual power consumption of the chiller room, Nyear (kWh), was calculated. Based on the annual cooling capacity Qyear (kWh) and total power consumption Nyear (kWh) of the chiller room, the annual operating energy efficiency ratio of the chiller room system can be calculated using the formula: ERa=Qyear / Nyear. Based on the typical weekly operating energy efficiency ratio and the actual annual operating energy efficiency ratio, calculate the deviation rate (E) between the typical weekly operating energy efficiency ratio and the actual annual operating energy efficiency ratio. The calculation formula is as follows: E=(EERweek-EERa) / EERa×100%; Based on the deviation rate between the typical weekly operating energy efficiency ratio and the actual annual operating energy efficiency ratio, the number of deviation rates P±10% in all measurable typical EERweeks within the ±10% allowable deviation range of the project is calculated; Calculate the total number of typical EERweeks that can be measured under test requirements during the stable operation of the chiller room system. P ; Using the formula: R = P ± 10% / P × 100%, calculate the guarantee rate (R) of the deviation rate (E) between the typical weekly operating energy efficiency ratio and the actual annual operating energy efficiency ratio within the ±10% allowable deviation range of the project. Based on the obtained guarantee rate, the energy efficiency of the chiller room system is evaluated and managed.

[0029] Please see Figure 2 , Figure 2 This is a structural diagram of a system for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room, as disclosed in an embodiment of the present invention. Figure 2 As shown, the system includes: The analysis unit analyzes the refrigeration room system to understand information such as system type, equipment parameters, and piping connections, and sets up and installs data acquisition and storage devices and systems for the refrigeration room system. The unit is set to calculate and obtain the local average outdoor temperature Tav (°C) over the past 3 years, and the ambient temperature Ttest (°C) is set based on Tav. The first calculation unit selects a typical week for measurement during the stable operation of the chiller room system, and evaluates the typical week's average outdoor temperature Tweek based on meteorological forecasts and historical meteorological data. 评估 (°C) level, calculate Tweek 评估 value; Acquisition unit, when Tweek 评估 When the temperature reaches ≥Ttest (°C), typical weekly continuous operation data of the refrigeration room system is collected and stored. The judgment unit is based on the actual outdoor average temperature Tweek of a typical week. 实际 Calculations are performed using (°C), assuming the typical weekly actual outdoor temperature Tweek. 实际 Not satisfied with Tweek 实际 If the temperature is ≥Ttest(°C), repeat the above steps; otherwise, proceed to the next step. The second calculation unit calculates the total cooling capacity and total power consumption of the chiller room system in a typical week by collecting the operating data, and calculates the energy efficiency ratio (EERweek) of the chiller room in a typical week. The evaluation unit replaces the annual operating energy efficiency ratio (EERa) of the chiller room system with the calculated typical weekly operating energy efficiency ratio (EERweek) for the energy efficiency evaluation and management of the chiller room system.

[0030] Please see Figure 3 and Figure 4The data acquisition equipment includes temperature sensors, flow sensors, and smart meters. The data acquisition equipment is connected to an industrial data gateway, and the data is uploaded to a data cloud server for storage via the data gateway, so that PCs can view and analyze the data in real time. The temperature sensors collect the supply and return water temperatures of the chilled water main and cooling water main in the chiller room. The flow sensors collect the flow rates of the chilled water main and cooling water main in the chiller room. The smart meters collect the power consumption of the chiller, chilled water pump, cooling water pump, and cooling tower.

[0031] After introducing the methods and apparatus of exemplary embodiments of the present invention, the following references are made. Figure 5 A computer-readable storage medium according to exemplary embodiments of the present invention will be described, please refer to... Figure 5 The computer-readable storage medium shown is an optical disc 50, on which a computer program (i.e., a program product) is stored. When the computer program is run by a processor, it performs the steps described in the above-described method implementation, such as analyzing the chiller room system, understanding the system type, equipment parameters, pipe connections, etc., setting up and installing chiller room system operation data acquisition and storage devices and systems; calculating and obtaining the local average outdoor temperature Tav (°C) for the past three years, and setting the measured ambient temperature Ttest (°C) based on Tav; selecting a typical week for measurement during the stable operation of the chiller room system, and evaluating the average outdoor temperature Tweek for the typical week based on meteorological forecasts and historical meteorological data. 评估 (°C) level, calculate Tweek 评估 Value; when Tweek 评估 When the temperature is ≥Ttest (°C), collect and store typical weekly continuous operation data for the refrigeration room system; collect and store typical weekly average outdoor temperature Tweek. 实际 Calculations are performed using (°C), assuming the typical weekly actual outdoor temperature Tweek. 实际 Not satisfied with Tweek 实际 If the temperature is ≥Ttest(°C), repeat the above steps; otherwise, proceed to the next step. Calculate the typical weekly total cooling capacity and total power consumption of the chiller room system using the collected operating data, and calculate the typical weekly chiller room operating energy efficiency ratio (EERweek). Replace the annual operating energy efficiency ratio (EERa) of the chiller room system with the calculated typical weekly chiller room operating energy efficiency ratio (EERweek) for the energy efficiency evaluation and management of the chiller room system. The specific implementation methods of each step will not be repeated here.

[0032] It should be noted that examples of the computer-readable storage medium may also include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical and magnetic storage media, which will not be elaborated here.

[0033] After introducing the methods, media, and apparatus of exemplary embodiments of the present invention, the following references are made. Figure 6 A calculation device for a method of rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room according to an exemplary embodiment of the present invention.

[0034] Figure 6 A block diagram is shown of an exemplary computing device 60 suitable for implementing embodiments of the present invention, which may be a computer system or a server. Figure 6 The computing device 60 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of the present invention.

[0035] like Figure 6 As shown, the components of computing device 60 may include, but are not limited to: one or more processors or processing units 601, system memory 602, and bus 603 connecting different system components (including system memory 602 and processing unit 601).

[0036] The computing device 60 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the computing device 60, including volatile and non-volatile media, removable and non-removable media.

[0037] System memory 602 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 6021 and / or cache memory 6022. Computing device 60 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, ROM 6023 may be used to read and write non-removable, non-volatile magnetic media (…). Figure 6 Not shown in the image (usually referred to as a "hard drive"). Although not shown in Figure 6The diagram shows that disk drives for reading and writing to removable non-volatile disks (e.g., "floppy disks") and optical disc drives for reading and writing to removable non-volatile optical discs (e.g., CD-ROMs, DVD-ROMs, or other optical media) can be provided. In these cases, each drive can be connected to bus 603 via one or more data media interfaces. System memory 602 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of the present invention.

[0038] A program / utility 6025 having a set (at least one) of program modules 6024 may be stored, for example, in system memory 602, and such program modules 6024 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment. Program modules 6024 typically perform the functions and / or methods described in the embodiments of the present invention.

[0039] The computing device 60 can also communicate with one or more external devices 604 (such as a keyboard, pointing device, display, etc.). This communication can be performed via input / output (I / O) interface 605. Furthermore, the computing device 60 can also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via network adapter 606. Figure 6 As shown, network adapter 606 communicates with other modules of computing device 60 (such as processing unit 601) via bus 603. It should be understood that, although... Figure 6 Other hardware and / or software modules may be used in conjunction with computing device 60, as not shown in the diagram.

[0040] The processing unit 601 executes various functional applications and data processing by running programs stored in the system memory 602. For example, it analyzes the chiller room system to understand its system configuration, equipment parameters, piping connections, etc.; sets up and installs data acquisition and storage devices and systems for the chiller room system; calculates and obtains the local average outdoor temperature Tav (°C) for the past three years; and sets the ambient temperature Ttest (°C) based on Tav. During the stable operation of the chiller room system, it selects a typical week for measurement and evaluates the average outdoor temperature Tweek (°C) based on meteorological forecasts and historical meteorological data, and calculates Tweek. 评估 Value; when Tweek 评估 When the temperature is ≥Ttest (°C), collect and store typical weekly continuous operation data for the refrigeration room system; collect and store typical weekly average outdoor temperature Tweek. 实际 Calculations are performed using (°C), assuming the typical weekly actual outdoor temperature Tweek.实际 Not satisfied with Tweek 实际 If the temperature is ≥Ttest(°C), repeat the above steps; otherwise, proceed to the next step. Calculate the typical weekly total cooling capacity and total power consumption of the chiller room system using the collected operational data, and calculate the typical weekly chiller room operating energy efficiency ratio (EERweek). Replace the annual operating energy efficiency ratio (EERa) of the chiller room system with the calculated typical weekly chiller room operating energy efficiency ratio (EERweek) for energy efficiency evaluation and management of the chiller room system. The specific implementation methods of each step will not be repeated here. It should be noted that although several units / modules or sub-units / sub-modules of a method for quickly and accurately measuring the annual operating energy efficiency ratio of a chiller room are mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of the present invention, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided into multiple units / modules for embodiment.

[0041] In the description of this invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0043] In the several embodiments provided by this invention, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0044] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0045] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0046] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0047] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

[0048] Furthermore, although the operations of the method of the present invention are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

Claims

1. A method for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room, characterized in that, The method includes: Analyze the refrigeration room system to understand its configuration, equipment parameters, and piping connection information; and set up and install data acquisition and storage devices and systems for the refrigeration room system. Calculate and obtain the local average outdoor temperature Tav (°C) for the past 3 years, and set the ambient temperature Ttest (°C) based on Tav; During the stable operation of the chiller room system, a typical week was selected for measurement, and the average outdoor temperature Tweek for the typical week was assessed based on meteorological forecasts and historical meteorological data. 评估 (°C) level, calculate Tweek 评估 value; When Tweek 评估 When the temperature reaches ≥Ttest (°C), typical weekly continuous operation data of the refrigeration room system is collected and stored. The actual outdoor average temperature Tweek of a typical week 实际 Calculations are performed using (°C), where the actual outdoor temperature of a typical week is Tweek. 实际 Not satisfied with Tweek 实际 If the condition is ≥Ttest(°C), repeat the above steps; otherwise, proceed to the next step. Based on the collected operational data, the total cooling capacity and total power consumption of the chiller room system in a typical week are calculated, and the energy efficiency ratio (EERweek) of the chiller room in a typical week is calculated. The calculated typical weekly energy efficiency ratio (EERweek) of the chiller room is used instead of the annual energy efficiency ratio (EERa) of the chiller room system for energy efficiency evaluation and management.

2. The method for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room according to claim 1, characterized in that, The calculation obtains the local average outdoor temperature Tav (°C) for the past 3 years, and the method for setting the measured ambient temperature Ttest (°C) based on Tav is as follows: Obtain local meteorological data parameters for the past three years; Based on meteorological data parameters, the local average outdoor temperature Tav (°C) for the past three years was calculated; The ambient temperature Ttest (°C) was calculated by rounding up from the local average outdoor temperature Tav (°C) for the past three years. The expression for calculating the ambient temperature Ttest (°C) using the outdoor average temperature Tav (°C) is: Ttest = ⌈Tav⌉ (°C).

3. The method for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room according to claim 1, characterized in that, The method for calculating the typical weekly total cooling capacity and total power consumption of the chiller room system based on the collected operational data, and for calculating the typical weekly energy efficiency ratio (EERweek) of the chiller room, is as follows: Calculate the total cooling capacity Qweek (kWh) and total power consumption Nweek (kWh) of the chiller room system during a typical week. Then, the ratio of the typical weekly total cooling capacity Qweek (kWh) to the typical weekly total power consumption Nweek (kWh) is calculated using the formula to obtain the typical weekly energy efficiency ratio (EERweek) of the chiller room. The calculation formula is: Qweek = c × m × Δt; EERweek = Qweek / Nweek; In the formula, c refers to the specific heat capacity of water (kJ / (kg / ℃)), m refers to the flow rate of chilled water pipeline (kg / s), and Δt refers to the temperature difference between chilled water supply and return (℃).

4. The method for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room according to claim 1, characterized in that, The calculated typical weekly energy efficiency ratio (EERweek) of the chiller room is used instead of the annual energy efficiency ratio (EERa) of the chiller room system for energy efficiency evaluation and management. Specifically, this method is as follows: Using the formula: Qyear=c×m×Δt, the annual cooling capacity of the refrigeration room, Qyear (kWh), can be calculated. Based on the collected data, the total annual power consumption of the chiller room, Nyear (kWh), was calculated. Based on the annual cooling capacity Qyear (kWh) and total power consumption Nyear (kWh) of the chiller room, the annual operating energy efficiency ratio of the chiller room system can be calculated using the formula: ERa=Qyear / Nyear. Based on the typical weekly operating energy efficiency ratio and the actual annual operating energy efficiency ratio, calculate the deviation rate (E) between the typical weekly operating energy efficiency ratio and the actual annual operating energy efficiency ratio. The calculation formula is as follows: E=(EERweek-EERa) / EERa×100%; Based on the deviation rate between the typical weekly operating energy efficiency ratio and the actual annual operating energy efficiency ratio, the number of deviation rates P±10% among all measurable typical weekly EERweeks within the ±10% allowable deviation range is calculated. Calculate the total number of typical EERweeks that can be measured under test requirements during the stable operation of the chiller room system. P ; Using the formula: R = P ± 10% / P × 100%, calculate the guarantee rate (R) of the deviation rate (E) between the typical weekly operating energy efficiency ratio and the actual annual operating energy efficiency ratio within the ±10% allowable deviation range of the project. Based on the obtained guarantee rate, the energy efficiency of the chiller room system is evaluated and managed.

5. A system for rapidly and accurately measuring the annual operating energy efficiency ratio of a chiller room, characterized in that, The system includes: The analysis unit analyzes the refrigeration room system to understand the system type, equipment parameters, and piping connection information, and sets up and installs data acquisition and storage devices and systems for the refrigeration room system. The unit is set to calculate and obtain the local average outdoor temperature Tav (°C) for the past 3 years, and the ambient temperature Ttest (°C) is set based on Tav. The first calculation unit selects a typical week for measurement during the stable operation of the chiller room system, and evaluates the typical week's average outdoor temperature Tweek based on meteorological forecasts and historical meteorological data. 评估 (°C) level, calculate Tweek 评估 value; Acquisition unit, when Tweek 评估 When the temperature reaches ≥Ttest (°C), typical weekly continuous operation data of the refrigeration room system is collected and stored. The judgment unit is based on the typical weekly actual-outdoor average temperature Tweek. 实际 Calculations are performed using (°C), assuming the typical weekly actual outdoor temperature Tweek. 实际 Not satisfied with Tweek 实际 If the temperature is ≥Ttest(°C), repeat the above steps; otherwise, proceed to the next step. The second calculation unit calculates the total cooling capacity and total power consumption of the chiller room system in a typical week by collecting the operating data, and calculates the energy efficiency ratio (EERweek) of the chiller room in a typical week. The evaluation unit replaces the annual operating energy efficiency ratio (EERa) of the chiller room system with the calculated typical weekly operating energy efficiency ratio (EERweek) for the energy efficiency evaluation and management of the chiller room system.

6. A computing device, the computing device comprising: At least one processor, memory, and input / output unit; The memory is used to store computer programs, and the processor is used to call the computer programs stored in the memory to execute the method as described in any one of claims 1 to 4.

7. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method as described in any one of claims 1 to 4.

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