Energy efficiency analysis method and device for regional cooling system, and electronic equipment

Abstract

The embodiment of the present application provides a method and device for analyzing the energy efficiency of a regional cooling system, and an electronic device, which belongs to the field of renewable energy technology. The method includes: obtaining a target system; performing a first-level subsystem energy efficiency analysis according to the second-level subsystem energy efficiency of each second-level subsystem corresponding to each first-level subsystem, and obtaining the first-level subsystem energy efficiency of the first-level subsystem; performing a first system energy efficiency analysis according to the cold-to-heat ratio of the power consumption of the cold storage refrigerant system, the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, and the refrigerator energy efficiency of the refrigerator, and obtaining the cold storage mode system energy efficiency; performing a second system energy efficiency analysis according to the cold storage mode system energy efficiency, the cold transmission system power consumption cold-to-heat ratio, the cooling and heat dissipation system power consumption cold-to-heat ratio, and the refrigerator energy efficiency, and obtaining the cooling mode system energy efficiency. The embodiment of the present application can simplify the process of system energy efficiency analysis.

Description

Technical Field

[0001] The present application relates to the field of renewable energy technology, and in particular to a method and device for analyzing energy efficiency of a regional cooling system, and electronic equipment. Background Art

[0002] The district cooling system is a system that centralizes cooling and distributes cooling capacity, and can be used in scenarios where buildings in a park are cooled. The energy efficiency of the district cooling system is of great significance in the design and operation analysis of the district cooling system. For example, the energy efficiency can be used to perform energy-saving diagnosis and analysis of the district cooling system, or to compare the energy efficiency of different cooling systems, etc.

[0003] The current system energy efficiency analysis method is relatively complex. For example, the district cooling system includes a variety of equipment. The current system energy efficiency analysis method is to directly calculate the energy efficiency of the district cooling system based on the physical parameters of the equipment (such as the capacity of the refrigerator, cooling load, etc.). The physical parameters of different equipment usually have different dimensions. The process of system energy efficiency analysis involves unit conversion, which increases the complexity of system energy efficiency analysis. In addition, the current system energy efficiency analysis method does not divide the primary subsystem of the district cooling system into secondary subsystems, and cannot analyze the energy efficiency of the primary subsystem.

[0004] Therefore, how to simplify the system energy efficiency analysis process has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The main purpose of the embodiments of the present application is to propose a method and device for analyzing energy efficiency of a regional cooling system, and electronic equipment, aiming to simplify the process of energy efficiency analysis of the system.

[0006] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application proposes a method for analyzing energy efficiency of a district cooling system, the method comprising:

[0007] Acquire a target system; wherein the target system includes at least two primary subsystems and a refrigerator, each of the primary subsystems includes at least one secondary subsystem, and the refrigerator is connected between the two primary subsystems;

[0008] According to the secondary subsystem energy efficiencies of each of the secondary subsystems corresponding to each of the primary subsystems, a primary subsystem energy efficiency analysis is performed to obtain the primary subsystem energy efficiency of the primary subsystem;

[0009] If the energy efficiency of each of the primary subsystems corresponding to the target system includes a cold-to-heat ratio of the power consumption of the cold storage refrigerant system and a cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, a first system energy efficiency analysis is performed according to the cold-to-heat ratio of the power consumption of the cold storage refrigerant system, the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, and the refrigerator energy efficiency of the refrigerator to obtain the cold storage mode system energy efficiency, and the cold storage mode system energy efficiency is determined as the target system energy efficiency;

[0010] If the energy efficiency of each of the first-level subsystems corresponding to the target system includes the cold-to-heat ratio of the power consumption of the cold transmission system, and the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, then the cold storage mode system energy efficiency is obtained, and a second system energy efficiency analysis is performed based on the cold storage mode system energy efficiency, the cold-to-heat ratio of the power consumption of the cold transmission system, the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, and the refrigeration machine energy efficiency to obtain the cooling mode system energy efficiency, and the cooling mode system energy efficiency is determined as the target system energy efficiency.

[0011] In some embodiments, each of the primary subsystems includes a cold transport system;

[0012] The second system energy efficiency analysis is performed according to the energy efficiency of the cold storage mode system, the power consumption to heat ratio of the cold transmission system, the power consumption to heat ratio of the cooling and heat dissipation system, and the energy efficiency of the refrigerator to obtain the energy efficiency of the cooling mode system, including:

[0013] An average energy efficiency is calculated based on the energy efficiency of the cold storage mode system and the gross cold storage load of the cold storage tank to obtain an average cold storage energy efficiency;

[0014] The cold storage and cooling load ratio is obtained by calculating the ratio of the gross cold source load of the cold storage tank and the total gross cooling load of the cold source of the cold energy transmission system;

[0015] The system energy efficiency is analyzed based on the average cold storage energy efficiency, the cold storage cooling load ratio, the cold transmission system power consumption to heat ratio, the cooling and heat dissipation system power consumption to heat ratio, and the refrigeration machine energy efficiency to obtain the cooling mode system energy efficiency.

[0016] In some embodiments, the system energy efficiency analysis is performed based on the average cold storage energy efficiency, the cold storage cooling load ratio, the cold transmission system power consumption to heat ratio, the cooling and heat dissipation system power consumption to heat ratio, and the refrigeration machine energy efficiency to obtain the cooling mode system energy efficiency, including:

[0017] Calculate the heat dissipation loss rate according to the cold storage and cooling load ratio and the energy efficiency of the secondary subsystem corresponding to the cold transmission system to obtain the heat dissipation loss rate of the external pipe network of the cold transmission system;

[0018] Constructing a first system energy efficiency relational expression according to the heat dissipation cold loss rate of the external pipe network of the cold transmission system and the power consumption cold-heat ratio of the cold transmission system;

[0019] Constructing a second system energy efficiency relationship according to the cold storage and cooling load ratio, the refrigeration machine energy efficiency, the cooling and heat dissipation system power consumption ratio, the cold storage average energy efficiency, and the cold transmission system power consumption ratio;

[0020] A cooling mode system energy efficiency analysis model is constructed according to the first system energy efficiency relationship equation and the second system energy efficiency relationship equation, and the cooling mode system energy efficiency is determined according to the cooling mode system energy efficiency analysis model.

[0021] In some embodiments, the energy efficiency of the cooling mode system is defined as follows:

[0022] ,

[0023] Indicates the energy efficiency of the cooling mode system; Indicates the power consumption cooling / heating ratio of the cooling transmission system; Indicates the heat dissipation and cold loss rate of the external pipe network of the cold transmission system; represents the energy efficiency of the refrigerator; Indicates the cold storage and cooling load ratio; Indicates the power consumption ratio of the cooling and heat dissipation system; represents the average energy efficiency of the cold storage;

[0024] Among them, the heat dissipation and cold loss rate of the external pipe network of the cold transmission system is defined as:

[0025] ,

[0026] Indicates the heat dissipation and cold loss rate of the external pipe network of the cold water system; Indicates the cold storage and cooling load ratio; Indicates the cooling / heating ratio of the chilled water system power consumption; Indicates the power consumption cooling to heating ratio of the glycol system.

[0027] In some embodiments, the secondary subsystem corresponding to the cold transport system includes: at least one of a cold water system, a cold water release system, and an ethylene glycol system;

[0028] The definition of the power consumption cooling-heat ratio of the cooling transmission system is as follows:

[0029] ,

[0030] Indicates the power consumption cooling / heating ratio of the cooling transmission system; represents the cooling-heat ratio of the power consumption of the cooling water system, that is, the energy efficiency of the secondary subsystem of the cooling water system; represents the cooling-heating ratio of the ethylene glycol system power consumption, that is, the energy efficiency of the secondary subsystem of the ethylene glycol system; represents the cooling-heating ratio of the power consumption of the chilled water system, that is, the energy efficiency of the secondary subsystem of the chilled water system; represents the cold storage and cooling load ratio, and The value range is When the secondary subsystem corresponding to the cold transport system does not include the ethylene glycol system and the cold water release system, and ;

[0031] Among them, the cold storage and cooling load ratio is defined as:

[0032] ,

[0033] Indicates the gross cold source load of the cold storage tank; Represents the total gross cooling load of the cold sources in the cold transport system.

[0034] In some embodiments, the energy efficiency of the cold storage mode system is defined as follows:

[0035] ,

[0036] Indicates the energy efficiency of the cold storage mode system; Indicates the power consumption ratio of the cold storage refrigerant system to heat; Indicates the power consumption ratio of the cooling and heat dissipation system; Indicates the energy efficiency of the refrigerator.

[0037] In some embodiments, each of the primary subsystems includes a cooling and heat dissipation system, and the secondary subsystem corresponding to the cooling and heat dissipation system includes a cooling water system and a cooling tower system;

[0038] The definition of the cooling and heat ratio of the cooling and heat dissipation system power consumption is shown in the following formula:

[0039] ,

[0040] Indicates the power consumption ratio of the cooling and heat dissipation system; Indicates the cooling-heat ratio of the cooling water system power consumption, that is, the energy efficiency of the secondary subsystem of the cooling water system; represents the cooling-to-heat ratio of the cooling tower system power consumption, that is, the energy efficiency of the secondary subsystem of the cooling tower system; Indicates the energy efficiency of the refrigerator.

[0041] In some embodiments, each of the primary subsystems includes a cold storage coolant system; the secondary subsystem corresponding to the cold storage coolant system includes any one of an ice storage system and a water storage system;

[0042] The definition of the power consumption cooling-heat ratio of the cold storage refrigerant system is as follows:

[0043] ,

[0044] Indicates the power consumption ratio of the cold storage refrigerant system to heat; represents the power consumption of the cold storage coolant system pump; if the secondary subsystem corresponding to the cold storage coolant system is the ice storage system, then represents the power consumption of the glycol pump. If the secondary subsystem corresponding to the cold storage coolant system is the water cold storage system, then Indicates the power consumption of the cold storage water pump; Indicates the gross refrigeration load of the chiller;

[0045] The definitions of equipment power consumption cooling-heating ratio, pipeline power consumption cooling-heating ratio, and system power consumption cooling-heating ratio are:

[0046] ,

[0047] ,

[0048] ,

[0049] Indicates the power consumption ratio of the device to heat; Indicates the cooling and heating ratio of the power consumption of the pipeline; Indicates the power consumption cooling to heating ratio of the system; Indicates gross cooling and heating power; Indicates the power of the device; Indicates effective power, that is, pipeline power; represents system power; H represents pump head; g represents gravitational acceleration; represents the pump efficiency; cp represents the specific heat; Represents the supply and return water temperature difference of the fluid passing through the cold and heat source equipment; wherein, the equipment power consumption cold-heat ratio is used to characterize the power consumption cold-heat ratio of the equipment of any of the secondary subsystems, the pipeline power consumption cold-heat ratio is used to characterize the power consumption cold-heat ratio of the pipeline of any of the secondary subsystems, and the system power consumption cold-heat ratio is used to characterize the primary subsystem energy efficiency of any of the primary subsystems, or the secondary subsystem energy efficiency of any of the secondary subsystems.

[0050] To achieve the above-mentioned purpose, a second aspect of an embodiment of the present application provides a district cooling system energy efficiency analysis device, the device comprising:

[0051] A target system acquisition module, used to acquire a target system; wherein the target system includes at least two primary subsystems and a refrigerator, each of the primary subsystems includes at least one secondary subsystem, and the refrigerator is connected between the two primary subsystems;

[0052] A primary subsystem energy efficiency analysis module, used to perform primary subsystem energy efficiency analysis according to the secondary subsystem energy efficiencies of each of the secondary subsystems corresponding to each of the primary subsystems, to obtain the primary subsystem energy efficiency of the primary subsystem;

[0053] A cold storage mode system energy efficiency analysis module is used for, if the energy efficiencies of each of the primary subsystems corresponding to the target system include a cold storage refrigerant system power consumption to heat ratio and a cooling and heat dissipation system power consumption to heat ratio, performing a first system energy efficiency analysis according to the cold storage refrigerant system power consumption to heat ratio, the cooling and heat dissipation system power consumption to heat ratio, and the refrigerator energy efficiency of the refrigerator, to obtain the cold storage mode system energy efficiency, and determining the cold storage mode system energy efficiency as the target system energy efficiency;

[0054] The cooling mode system energy efficiency analysis module is used to obtain the cold storage mode system energy efficiency if the energy efficiencies of each of the first-level subsystems corresponding to the target system include the cold-to-heat ratio of the power consumption of the cold transmission system and the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, and to perform a second system energy efficiency analysis based on the cold storage mode system energy efficiency, the cold-to-heat ratio of the power consumption of the cold transmission system, the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, and the refrigeration machine energy efficiency to obtain the cooling mode system energy efficiency, and determine the cooling mode system energy efficiency as the target system energy efficiency.

[0055] To achieve the above objectives, a third aspect of an embodiment of the present application proposes an electronic device, which includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method described in the first aspect is implemented.

[0056] The energy efficiency analysis method and device of the regional cooling system proposed in the present application, and the electronic device, perform a first-level subsystem energy efficiency analysis according to the second-level subsystem energy efficiency of each second-level subsystem corresponding to each first-level subsystem, and obtain the first-level subsystem energy efficiency of the first-level subsystem; if the energy efficiencies of each first-level subsystem corresponding to the target system include the cold-to-heat ratio of the power consumption of the cold storage refrigerant system, and the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, then a first system energy efficiency analysis is performed according to the cold-to-heat ratio of the power consumption of the cold storage refrigerant system, the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, and the refrigerator energy efficiency of the refrigerator, to obtain the cold storage mode system energy efficiency, and the cold storage mode system energy efficiency is determined as the target system energy efficiency; if the energy efficiencies of each first-level subsystem corresponding to the target system include the cold-to-heat ratio of the power consumption of the cold transmission system, and the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, then a second system energy efficiency analysis is performed according to the cold storage mode system energy efficiency, the cold transmission system power consumption cold-to-heat ratio, the cooling and heat dissipation system power consumption cold-to-heat ratio, and the refrigerator energy efficiency, to obtain the cooling mode system energy efficiency, and the cooling mode system energy efficiency is determined as the target system energy efficiency. It can be seen that the present application divides the target system into first-level subsystems, and then divides the first-level subsystems into second-level subsystems. After obtaining the corresponding first-level subsystem energy efficiency based on the energy efficiency analysis of each second-level subsystem, the target system energy efficiency can be obtained based on the energy efficiency analysis of each first-level subsystem, thereby simplifying the process of energy efficiency analysis on the target system. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 is a flow chart of a method for analyzing energy efficiency of a regional cooling system provided in an embodiment of the present application;

[0058] Figure 2 This is a module block diagram of a target system of a cold storage mode provided in an embodiment of the present application;

[0059] Figure 3 It is a module block diagram of an external ice melting system provided in one embodiment of the present application;

[0060] Figure 4 It is a module block diagram of a water cooling storage system provided in one embodiment of the present application;

[0061] Figure 5 It is a module block diagram of a single refrigeration system provided in one embodiment of the present application;

[0062] Figure 6 yes Figure 1 Flowchart of step 104 in;

[0063] Figure 7 yes Figure 6 Flow chart of step 203 in;

[0064] Figure 8 This is a module block diagram of a cold and heat transport circulation pipeline system provided by an embodiment of the present application;

[0065] Fig. 9 It is a structural schematic diagram of a regional cooling system energy efficiency analysis device provided in an embodiment of the present application;

[0066] Fig.10 It is a schematic diagram of the hardware structure of the electronic device provided in the embodiment of the present application. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0068] It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0070] First, some nouns involved in this application are analyzed:

[0071] District cooling system: The district cooling system is a system that centralizes cooling and distributes cooling capacity, which can be applied to the cooling of park buildings. The district cooling system has advantages in overall energy conservation and large-scale use of renewable energy in the park. It is an important part of the zero-carbon energy system and the new power system, and has become one of the preferred choices for cooling park buildings.

[0072] Plate heat exchanger: refers to a heat exchanger composed of a series of stacked plates. Thin rectangular channels are formed between the plates of the plate heat exchanger, through which heat can be exchanged.

[0073] System installed capacity: also known as system power generation equipment capacity. It represents the sum of the rated active power of the generator sets actually installed in the system.

[0074] The energy efficiency analysis method, device, and electronic device for the regional cooling system provided in the embodiments of the present application are specifically described through the following embodiments. First, the energy efficiency analysis method for the regional cooling system in the embodiments of the present application is described.

[0075] The district cooling system energy efficiency analysis method provided in the embodiment of the present application can be applied to the terminal, can also be applied to the server side, and can also be software running in the terminal or the server side. In some embodiments, the terminal can be a smart phone, a tablet computer, a laptop computer, a desktop computer, etc.; the server side can be configured as an independent physical server, or a server cluster or distributed system composed of multiple physical servers, and can also be configured as a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms; the software can be an application that implements the district cooling system energy efficiency analysis method, etc., but is not limited to the above forms.

[0076] The present application can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc. The present application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application can also be practiced in distributed computing environments, in which tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

[0077] Figure 1 is an optional flow chart of the district cooling system energy efficiency analysis method provided in the embodiment of the present application, Figure 1 The method may include but is not limited to steps 101 to 104.

[0078] Step 101, obtaining a target system; wherein the target system includes at least two primary subsystems and a refrigerator, each primary subsystem includes at least one secondary subsystem, and the refrigerator is connected between the two primary subsystems;

[0079] Step 102, performing a first-level subsystem energy efficiency analysis according to the second-level subsystem energy efficiencies of each second-level subsystem corresponding to each first-level subsystem, and obtaining the first-level subsystem energy efficiency of the first-level subsystem;

[0080] Step 103, if the energy efficiency of each primary subsystem corresponding to the target system includes the power consumption ratio of the cold storage and coolant system to heat, and the power consumption ratio of the cooling and heat dissipation system to heat, then a first system energy efficiency analysis is performed according to the power consumption ratio of the cold storage and coolant system, the power consumption ratio of the cooling and heat dissipation system to heat, and the refrigerator energy efficiency of the refrigerator to obtain the cold storage mode system energy efficiency, and the cold storage mode system energy efficiency is determined as the target system energy efficiency;

[0081] Step 104, if the energy efficiency of each first-level subsystem corresponding to the target system includes the cold-to-heat ratio of the power consumption of the cold transmission system and the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, then the cold storage mode system energy efficiency is obtained, and the second system energy efficiency analysis is performed according to the cold storage mode system energy efficiency, the cold-to-heat ratio of the power consumption of the cold transmission system, the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, and the refrigeration machine energy efficiency to obtain the cooling mode system energy efficiency, and the cooling mode system energy efficiency is determined as the target system energy efficiency.

[0082] The beneficial effects of the embodiments of the present application include but are not limited to: performing a first-level subsystem energy efficiency analysis based on the second-level subsystem energy efficiencies of each second-level subsystem corresponding to each first-level subsystem to obtain the first-level subsystem energy efficiency; if the energy efficiencies of each first-level subsystem corresponding to the target system include the cold-to-heat ratio of the power consumption of the cold storage refrigerant system, and the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, then performing a first system energy efficiency analysis based on the cold-to-heat ratio of the power consumption of the cold storage refrigerant system, the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, and the refrigerator energy efficiency of the refrigerator to obtain the cold storage mode system energy efficiency, and determining the cold storage mode system energy efficiency as the target system energy efficiency; if the energy efficiencies of each first-level subsystem corresponding to the target system include the cold-to-heat ratio of the power consumption of the cold transmission system, and the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, then performing a second system energy efficiency analysis based on the cold storage mode system energy efficiency, the cold transmission system power consumption ratio, the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, and the refrigerator energy efficiency to obtain the cooling mode system energy efficiency, and determining the cooling mode system energy efficiency as the target system energy efficiency. It can be seen that the present application divides the target system into first-level subsystems, and then divides the first-level subsystems into second-level subsystems. After obtaining the corresponding first-level subsystem energy efficiency based on the energy efficiency analysis of each second-level subsystem, the target system energy efficiency can be obtained based on the energy efficiency analysis of each first-level subsystem, thereby simplifying the process of energy efficiency analysis on the target system.

[0083] In step 101 of some embodiments, the target system may refer to a regional cooling system. Specifically, the operating mode of the target system includes any one of a cold storage mode and a cooling mode. In another embodiment, the target system may also refer to a heating system, which is not limited in the embodiments of the present application.

[0084] In step 102 of some embodiments, the target system can be divided into three levels: the overall system, the primary subsystem, and the secondary subsystem. The overall system is the target system itself including all subsystems. If the working mode of the target system is the cold storage mode, the primary subsystem includes a cooling and heat dissipation system and a cold storage refrigerant system. In another embodiment, if the working mode of the target system is the cooling mode, the primary subsystem includes a cooling and heat dissipation system and a cold mass transmission system. In one embodiment, if the working mode of the target system is the cooling mode, the target system can be any one of: an external ice melting system, a water cold storage system, and a single refrigeration system. The difference between the target systems of the above three cooling modes is that the secondary subsystems included in the cold mass transmission system are different. Specifically, if the target system of the cooling mode is an external ice melting system, the secondary subsystem corresponding to the cold mass transmission system includes: a cold water system, a cold water release system, and an ethylene glycol system. If the target system of the cooling mode is a water cold storage system, the secondary subsystem corresponding to the cold mass transmission system includes: a cold water system and a cold water release system. If the target system of the cooling mode is a single refrigeration system, the secondary subsystem corresponding to the cold mass transmission system includes: a cold water system.

[0085] In step 103 of some embodiments, when the working mode of the target system is the cold storage mode, the energy efficiency of each primary subsystem corresponding to the target system includes the power consumption cold-heat ratio of the cold storage refrigerant system and the power consumption cold-heat ratio of the cooling and heat dissipation system. It can be understood that the embodiment of the present application adopts the power consumption cold-heat ratio to reflect the energy efficiency of the system (such as the target system, the primary subsystem, and the secondary subsystem).

[0086] In step 104 of some embodiments, when the operating mode of the target system is the cooling mode, the energy efficiency of each primary subsystem corresponding to the target system includes the power consumption to heat ratio of the cold transfer system and the power consumption to heat ratio of the cooling and heat dissipation system.

[0087] See also Figure 2 In some embodiments, the module structure of the target system of the cold storage mode is as follows: Figure 2 The target system of the cold storage mode includes the refrigerator and two primary subsystems (cooling and heat dissipation system and cold storage and coolant system). The cooling and heat dissipation system and the cold storage and coolant system are connected through the refrigerator. The cooling and heat dissipation system is used to dissipate heat from the refrigerator, and the cold storage and coolant system is used to store the cold generated by the refrigerator. The two secondary subsystems of the cooling and heat dissipation system include the cooling tower system (i.e. Figures 2 to 5 The cooling tower in the cooling tower) and the cooling water system. The cooling water system includes a cooling water pump and a water pipeline connected to the cooling water pump. It should be noted that the secondary subsystem of the cold storage coolant system can be an ice storage system or a water storage system, wherein the ice storage system refers to the coolant of the cold storage coolant system being ethylene glycol, and the water storage system refers to the coolant being water.

[0088] See also Figure 3 In some embodiments, when the target system of the cooling mode is an external ice melting system, the module structure of the external ice melting system is as follows: Figure 3 As shown. The target system of the cooling mode includes two primary subsystems, the cooling and heat dissipation system and the cold mass transmission system, as well as the refrigerator. The cooling and heat dissipation system and the cold mass transmission system are connected through the refrigerator. The cooling and heat dissipation system is used to dissipate the heat of the refrigerator, and the cold mass transmission system is used to transfer the cold mass generated by the refrigerator (or Figure 3 and Figure 4 The user can refer to the cooling object of the target system, such as a preset area, building, room (such as a computer room), equipment (such as a server in a computer room), etc. Figure 3 In the figure, the cold transmission system of the external ice melting system includes three secondary subsystems, specifically the ethylene glycol system, the cold water system and the cold water release system. Specifically, the ethylene glycol system is connected to the cold water system through an ethylene glycol plate heat exchanger, and the cold water system is connected to the cold water release system through a cold release plate heat exchanger. It can be understood that plate heat exchanger is the abbreviation of plate heat exchanger. The ethylene glycol system includes an ethylene glycol pump. The cold water system includes an ethylene glycol plate heat exchanger primary pump, a cold release plate heat exchanger primary pump and a secondary pump; the ethylene glycol plate heat exchanger primary pump connects the ethylene glycol plate heat exchanger and the user, the cold release plate heat exchanger primary pump connects the cold release plate heat exchanger and the user, and the secondary pump connects the ethylene glycol plate heat exchanger, the cold release plate heat exchanger and the user. The cold water release system includes a cold release pump and a cold storage tank; the cold release pump is connected to the cold storage tank, and the cold release plate heat exchanger is connected to the cold release pump and the cold storage tank.

[0089] See also Figure 4 In some embodiments, when the target system of the cooling mode is a water storage system, the module structure of the water storage system is as follows: Figure 4 The cooling and heat dissipation system is connected to the cold transmission system through a refrigerator. The structure of the cooling and heat dissipation system can be referred to Figure 3 The detailed description of the cooling system in the previous section will not be repeated here. Figure 4 In the refrigeration transmission system, the secondary subsystem includes a cold water system and a cold water release system, and the cold water system and the cold water release system are connected through a cold plate exchanger. The cold water system includes a refrigerant primary pump, a cold plate exchanger primary pump, and a secondary pump; the refrigerant primary pump connects the chiller and the user, the cold plate exchanger primary pump connects the cold plate exchanger and the user, and the secondary pump connects the chiller, the cold plate exchanger, and the user. The structure of the cold water release system can be referred to Figure 3 The detailed description of the cooling water system is omitted here.

[0090] See also Figure 5 In some embodiments, when the target system of the cooling mode is a single cooling system, the module structure of the single cooling system is as follows: Figure 5 The cooling and heat dissipation system is connected to the cold transmission system through a refrigerator. The structure of the cooling and heat dissipation system can be referred to Figure 3 The detailed description of the cooling system in the previous section will not be repeated here. Figure 5 In the chilled water system, the primary pump and the secondary pump are included; the primary pump is connected to the user and the refrigerator, the refrigerator is connected to the secondary pump, and the secondary pump is connected to the user.

[0091] See also Figure 6 In some embodiments, each primary subsystem includes a cold transport system; in step 104, the second system energy efficiency analysis is performed according to the cold storage mode system energy efficiency, the cold-to-heat ratio of the cold transport system power consumption, the cold-to-heat ratio of the cooling and heat dissipation system power consumption, and the refrigeration machine energy efficiency to obtain the cooling mode system energy efficiency, which may include but is not limited to steps 201 to 203:

[0092] Step 201, calculating the average energy efficiency according to the energy efficiency of the cold storage mode system and the gross cold storage load of the cold storage pool to obtain the average cold storage energy efficiency;

[0093] Step 202, calculating the ratio of the gross cold source load of the cold storage tank of the cold transmission system to the gross cold supply load of the cold source to obtain the cold storage and cold supply load ratio;

[0094] Step 203 , performing system energy efficiency analysis based on the average cold storage energy efficiency, the cold storage cooling load ratio, the cold transmission system power consumption to heat ratio, the cooling and heat dissipation system power consumption to heat ratio, and the refrigeration machine energy efficiency, to obtain the cooling mode system energy efficiency.

[0095] The advantage of this embodiment is that after calculating the average cold storage energy efficiency and the cold storage to cooling load ratio, the cooling mode system energy efficiency is calculated based on the average cold storage energy efficiency, the cold storage to cooling load ratio, the first-level subsystem energy efficiency corresponding to the target system of the cooling mode (that is, the cold-to-heat ratio of the power consumption of the cold transmission system, and the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system), and the refrigeration machine energy efficiency, so that the target system energy efficiency can be directly calculated based on the first-level subsystem energy efficiency, thereby simplifying the target system energy efficiency analysis process.

[0096] See also Figure 7 In some embodiments, step 203 may include but is not limited to steps 301 to 304:

[0097] Step 301, calculating the heat dissipation loss rate according to the cold storage and cooling load ratio and the energy efficiency of the secondary subsystem corresponding to the cold transmission system, and obtaining the heat dissipation loss rate of the external pipe network of the cold transmission system;

[0098] Step 302, constructing a first system energy efficiency relational expression according to the heat dissipation loss rate of the external pipe network of the cold transport system and the power consumption cold-heat ratio of the cold transport system;

[0099] Step 303, constructing a second system energy efficiency relational expression according to the cold storage and cooling load ratio, the energy efficiency of the refrigerator, the power consumption and heat ratio of the cooling and heat dissipation system, the average energy efficiency of the cold storage, and the power consumption and heat ratio of the cooling transmission system;

[0100] Step 304: construct a cooling mode system energy efficiency analysis model according to the first system energy efficiency relationship and the second system energy efficiency relationship, and determine the cooling mode system energy efficiency according to the cooling mode system energy efficiency analysis model.

[0101] The advantage of this embodiment is that the system energy efficiency of the cooling mode is calculated based on the average cold storage energy efficiency, the cold storage cooling load ratio, the first-level subsystem energy efficiency corresponding to the target system of the cooling mode (that is, the cold-to-heat ratio of the power consumption of the cold transmission system, and the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system), and the refrigeration machine energy efficiency, so that the target system energy efficiency can be directly calculated based on the first-level subsystem energy efficiency, simplifying the target system energy efficiency analysis process.

[0102] It should be noted that when the target system is a district cooling system, it has two working modes, namely, cold storage mode and cooling mode.

[0103] In some embodiments, the energy efficiency of the cold storage mode system is defined as follows:

[0104] , formula (1);

[0105] Indicates the energy efficiency of the cold storage mode system; Indicates the power consumption ratio of the cold storage refrigerant system to heat; Indicates the power consumption ratio of cooling and heat dissipation system; Indicates the energy efficiency of the refrigerator.

[0106] In some embodiments, the energy efficiency of the cooling mode system is defined as follows:

[0107] , formula (2);

[0108] Indicates the system energy efficiency in cooling mode; Indicates the ratio of power consumption to heat in the cooling transmission system; Indicates the heat dissipation and cold loss rate of the external pipe network of the cold transmission system; Indicates the energy efficiency of the refrigerator; Indicates the proportion of cold storage and cooling load; Indicates the power consumption ratio of cooling and heat dissipation system; It represents the average energy efficiency of cold storage;

[0109] Among them, the heat dissipation and cold loss rate of the external pipe network of the cold transmission system is defined as:

[0110] , formula (3);

[0111] Indicates the heat dissipation and cold loss rate of the external pipe network of the cold water system; Indicates the proportion of cold storage and cooling load; Indicates the cooling / heating ratio of the chilled water system power consumption; Indicates the power consumption cooling to heating ratio of the glycol system.

[0112] In step 301 of some embodiments, the energy efficiency of the secondary subsystem corresponding to the cooling transmission system may include the cooling-heat ratio of the cooling water system power consumption in formula (3): , and glycol system power consumption cooling and heating ratio .

[0113] In step 302 of some embodiments, the first system energy efficiency relationship may refer to the numerator of formula (2).

[0114] In step 303 of some embodiments, the second system energy efficiency relationship may refer to the denominator of formula (2).

[0115] In step 304 of some embodiments, formula (2) is equivalent to the above-mentioned cooling mode system energy efficiency analysis model. ,when When , it means that the target system only uses the cold storage pool for cooling (for example, using the ice pool for melting ice for cooling); when When , it means that the target system only uses the refrigerator for cooling; when When , it means that the target system adopts the combined cooling mode of refrigeration by refrigeration machine and ice melting by ice pool. When , formula (2) can be applied to water storage system and single refrigeration system; and When , formula (2) can be applied to a single refrigeration system.

[0116] It should be noted that, referring to formula (2), the energy efficiency of the cooling mode system is independent of the specific physical parameters of the equipment in the target system (such as system installed capacity, cold storage installed capacity, system hourly cold load, etc.). At the level of the primary subsystem, the energy efficiency of different target systems (such as multiple regional cooling systems, or large regional cooling systems and single chilled water air conditioning systems) can be compared, thereby establishing a unified indicator for comparing the energy efficiency of different target systems, analyzing the operating conditions of the target system, and analyzing the impact of the primary subsystem on the total energy efficiency of the target system. In addition, when the target system is a regional cooling system, the external pipe network cold loss of the regional cooling system can also be compared with the impact of each primary subsystem on the energy efficiency of the target system, to find the main factors affecting the energy efficiency of the regional cooling system, and to evaluate the weight of the impact of the external pipe network cold loss on the energy efficiency of the regional cooling system. In another embodiment, the energy efficiency of the target system can also be optimized by detecting the cold and heat transfer efficiency of each subsystem, which is not limited in the embodiment of the present application.

[0117] It should be noted that formula (1) is used to analyze the energy efficiency of the target system in the cold storage mode according to the corresponding primary subsystem energy efficiency (cold-to-heat ratio of power consumption of the cold storage refrigerant system and the cold-to-heat ratio of power consumption of the cooling and heat dissipation system) and the energy efficiency of the refrigerator; formula (2) is used to analyze the energy efficiency of the target system in the cooling mode according to the corresponding primary subsystem energy efficiency (cold-to-heat ratio of power consumption of the cold transmission system and the cold-to-heat ratio of power consumption of the cooling and heat dissipation system) and the energy efficiency of the refrigerator. Specifically, formula (1) and formula (2) are both dimensionless system energy efficiency relationship formulas. In another embodiment, the dimensionless system energy efficiency expression can also be converted into the system energy efficiency expression using dimensional physical parameters. The dimensionless power consumption cold-to-heat ratio can be calculated from parameters such as energy consumption and cold-to-heat quantity, and energy consumption and cold-to-heat quantity can also be expressed by the dimensionless power consumption cold-to-heat ratio, which provides convenience for system energy efficiency analysis in different application scenarios.

[0118] In some embodiments, the refrigerator energy efficiency Specifically, it can be the gross refrigeration energy efficiency of the refrigerator. is defined as:

[0119] , formula (4);

[0120] Indicates the gross cooling load of the chiller; Indicates the electrical power of the refrigerator.

[0121] In some embodiments, the net refrigeration load (also called net cooling capacity) of the refrigerant can also be used. Instead of gross cooling load (also called gross cooling capacity) , that is, the net energy efficiency of the refrigerator To approximate the gross refrigeration efficiency of the refrigerator .

[0122] It should be noted that the units of load and power in each formula are unified, for example, kw (kilowatt) is used as a unified unit.

[0123] In some embodiments, the average energy efficiency of cold storage is defined as:

[0124] , formula (5);

[0125] Among them, τ represents the cold storage period; Indicates the gross cold storage load of the cold storage tank; represents the energy efficiency of the cold storage mode system, and its definition is shown in formula (1).

[0126] In some embodiments, the above average energy efficiency of cold storage It can also be used to calculate the equivalent power consumption of the target system in the subsequent cooling stage. The equivalent power consumption is defined as:

[0127] , formula (6);

[0128] in, To release the cooling load The equivalent power consumption.

[0129] In some embodiments, if the target system is a water cooling system, then , the cooling mode system energy efficiency corresponding to formula (2) can be expressed as:

[0130] , formula (7);

[0131] In some embodiments, if the target system is a single refrigeration system, then and , the cooling mode system energy efficiency corresponding to formula (2) can be expressed as:

[0132] , formula (8);

[0133] The definition of each parameter can refer to the parameter definition of the above formula, which will not be repeated here.

[0134] In some embodiments, each primary subsystem includes a cold storage coolant system; the secondary subsystem corresponding to the cold storage coolant system includes any one of an ice storage system and a water storage system;

[0135] The definition of the power consumption cooling-heat ratio of the cold storage refrigerant system is as follows:

[0136] , formula (9);

[0137] Indicates the power consumption ratio of the cold storage refrigerant system to heat; Indicates the power consumption of the cold storage coolant system pump; if the secondary subsystem corresponding to the cold storage coolant system is an ice storage system, then Indicates the power consumption of the glycol pump. If the secondary subsystem corresponding to the cold storage coolant system is a water storage system, then Indicates the power consumption of the cold storage water pump; Indicates the gross cooling load of the chiller.

[0138] In some embodiments, each primary subsystem includes a cooling and heat dissipation system, and the secondary subsystem corresponding to the cooling and heat dissipation system includes a cooling water system and a cooling tower system;

[0139] The definition of the cooling and heat ratio of the cooling and heat dissipation system power consumption is shown in the following formula:

[0140] , formula (10);

[0141] Indicates the power consumption ratio of cooling and heat dissipation system; It represents the cooling-heat ratio of the cooling water system power consumption, that is, the energy efficiency of the secondary subsystem of the cooling water system; It represents the cooling-heat ratio of the cooling tower system power consumption, that is, the energy efficiency of the secondary subsystem of the cooling tower system; Indicates the energy efficiency of the refrigerator.

[0142] Among them, the cooling water system power consumption ratio is is defined as:

[0143] , formula (11);

[0144] Indicates the water pump input power of the cooling water system; Indicates the gross heat rejection load of the condenser of the refrigerator;

[0145] Among them, the cooling tower system power consumption ratio is is defined as:

[0146] , formula (12);

[0147] Indicates the electrical power of the cooling tower fan; Indicates the gross heat dissipation power on the wind side of the cooling tower.

[0148] It should be noted that the cooling water system and the cooling tower system can usually be considered as a chiller heat dissipation system (that is, the cooling and heat dissipation system mentioned above) for overall energy efficiency.

[0149] It should be noted that each primary subsystem may include a cold transport system.

[0150] In some embodiments, the secondary subsystem corresponding to the cold transport system includes: at least one of a cold water system, a cold water release system, and an ethylene glycol system;

[0151] The definition of the power consumption cooling-heat ratio of the cooling transmission system is as follows:

[0152] , formula (13);

[0153] Indicates the ratio of power consumption to heat in the cooling transmission system; It represents the ratio of power consumption of cooling water system to heat water, that is, the energy efficiency of the secondary subsystem of cooling water system; It represents the cooling-heating ratio of the glycol system power consumption, that is, the secondary subsystem energy efficiency of the glycol system; It represents the ratio of power consumption of the chilled water system to heat and cold, i.e. the energy efficiency of the secondary subsystem of the chilled water system; represents the ratio of cold storage to cooling load, and The value range is ; When the secondary subsystem corresponding to the cold transmission system does not include the glycol system and the cold water release system, and ;

[0154] Among them, the proportion of cold storage and cooling load is defined as:

[0155] , formula (14);

[0156] Indicates the gross cold source load of the cold storage pool; It represents the total gross cooling load of cold sources in the cooling transmission system.

[0157] Among them, the total gross cooling load of the cold source of the cold transmission system is is defined as:

[0158] , formula (15);

[0159] Indicates the gross refrigeration load of the chiller;

[0160] Among them, the cooling water system power consumption ratio is is defined as:

[0161] , formula (16);

[0162] Indicates the pump power of the cooling system; Indicates the gross cold source load of the cold storage pool;

[0163] Among them, the power consumption of ethylene glycol system is cold and hot ratio is defined as:

[0164] , formula (17);

[0165] Indicates glycol pump power; Indicates the gross refrigeration load of the chiller;

[0166] Among them, the power consumption of the chilled water system is cold to hot ratio. is defined as:

[0167] , formula (18);

[0168] Indicates the power consumption of the chilled water system; Indicates the total gross cooling load of the cold source of the chilled water system.

[0169] In some embodiments, the energy conservation of the chilled water system can be uniformly expressed as:

[0170] , formula (19);

[0171] , formula (20);

[0172] , formula (21);

[0173] Indicates the total gross cooling load of the cold source of the chilled water system, which can specifically include the gross cooling load of the cold water side of the chiller cold source Gross cooling load on the cold water side of the cold source ; Indicates the power consumption of the chilled water system, including the power consumption of all primary and secondary chilled water pumps; Indicates the cooling loss load of the pipe network; Indicates the gross cooling load of the network users; Indicates the power consumption of the first-stage cold water pump of the refrigeration cold source; Indicates the power consumption of the primary cold water pump of the cold plate exchanger. For a single refrigeration system, is 0; Indicates the power consumption of the secondary pump.

[0174] It should be noted that the energy efficiency definitions of each primary subsystem can refer to formula (9), formula (10) and formula (13) respectively. The number of secondary subsystems corresponding to the power consumption ratio of the cold storage and coolant system in formula (9) is one, such as an ice storage system or a water storage system; the energy efficiency definitions of each secondary subsystem corresponding to the power consumption ratio of the cooling and heat dissipation system in formula (10) can refer to formulas (11) to (12); the energy efficiency definitions of each secondary subsystem corresponding to the power consumption ratio of the cold transmission system in formula (13) can refer to formulas (16) to (18).

[0175] In some embodiments, the cooling mode system energy efficiency analysis model is a dimensionless system energy efficiency analysis model. Specifically, the embodiment of the present application uses the power consumption to heat ratio as the energy efficiency, and the power consumption to heat ratio is a dimensionless parameter; the target system energy efficiency is a function of the power consumption to heat ratio of each primary subsystem, and the power consumption to heat ratio of the primary subsystem is a function of the power consumption to heat ratio of the secondary subsystem; and the power consumption to heat ratio of the secondary subsystem is a function of the thermodynamic state parameters and hydraulic state parameters of the fluid in the equipment or pipeline, thereby combining the laws of thermodynamics with hydraulic characteristics, and realizing the technical solution of analyzing the energy efficiency of the secondary subsystem through thermodynamic state parameters and hydraulic state parameters, and then analyzing the energy efficiency of the primary subsystem through the energy efficiency of the secondary subsystem, and finally obtaining the energy efficiency of the target system through the energy efficiency analysis of the primary subsystem, which greatly simplifies the analysis process of the system energy efficiency.

[0176] See also Figure 8 , the heat and cold transmission circulation pipeline system such as Figure 8 As shown, the system is a circulation system that uses fluid in a pipeline to transport cold and heat. The system includes a cold source (or heat source), a cold load (or heat load), a fluid transmission power device, and a fluid circulation pipeline. Specifically, the fluid power device can be a water pump, a fan, etc., which is a device that provides transmission power for the fluid. The fluid transports the cold produced by the cold source (or the heat produced by the heat source) to the cold load (or heat load).

[0177] Figure 8 The energy conservation of the intercooler heat transfer circulation pipeline system is expressed as:

[0178] , formula (22);

[0179] In the formula, the superscript ' represents gross power, the subscript s represents source, the subscript l represents load, and the subscript hl represents pipeline heat dissipation loss; It represents the gross cooling and heating power of the cooling and heating sources; W represents the power of the fluid power equipment; Indicates the heat dissipation loss of the pipeline; Indicates the gross cooling and heating power of the cooling and heating load. Specifically, the system heat absorption can be taken as a positive value, and the system heat release can be taken as a negative value, so the cooling source power is a negative value and the heat source power is a positive value. For the convenience of expression, power can also be expressed in absolute values.

[0180] It should be noted that for refrigerators, the friction between the evaporator and condenser body and the fluid generates heat, so the cooling and heating power is divided into gross refrigerating / heating rate and net refrigerating / heating rate. Gross heating power refers to the heat exchange between the cold and heat source and the cold and heat-carrying fluid, excluding the pressure drop caused by the friction resistance inside the cold and heat source equipment, which causes the output cooling capacity to decrease or the output heat to increase; net refrigerating / heating rate takes into account the influence of the frictional heat generated by the fluid inside the cold and heat source equipment, and refers to the total heat output of the cold and heat source to the cold-carrying fluid, which is manifested as the sensible heat change of the fluid from the inlet to the outlet of the cold and heat source equipment. It is a measurable parameter, while the gross refrigerating / heating rate needs to be calculated and corrected by adding or subtracting the influence of the heat dissipation caused by the pressure drop on the basis of the measured net cooling and heating power. For other cold and hot sources or cold and hot loads, such as plate exchangers, ice storage coils, cooling towers, etc., there are also gross cold and hot load powers and net cold and hot load powers. The gross cold and hot load powers do not consider the influence of heat dissipation caused by fluid friction inside the cold and hot source equipment, while the net cold and hot load powers consider the influence of heat dissipation caused by fluid pressure drop.

[0181] In some embodiments, the effective power of the fluid power device and the power loss within the device can be expressed as:

[0182] , formula (23);

[0183] , formula (24);

[0184] V represents flow rate, unit is (cubic meters per hour); Indicates density in units of (kilograms per cubic meter); H represents the pump head, or the total head loss of the pipeline, in m (meter); g represents the acceleration of gravity, in (meters per second squared); Indicates the efficiency of the pump.

[0185] For pipeline resistance, the total head loss caused by the resistance of cold and hot source equipment can be included Total head loss caused by resistance of other parts of the pipeline , the sum of the two is the pump head H, that is, the pump head H is defined as:

[0186] , formula (25);

[0187] Effective power is defined as:

[0188] , formula (26);

[0189] In the formula, Indicates the flow resistance power consumption of the cold and hot source equipment, It represents the power consumption of flow resistance in other parts of the pipeline, and its definitions are:

[0190] , formula (27);

[0191] , formula (28);

[0192] For cold and hot sources, the flow resistance of the equipment causes heat dissipation. is defined as:

[0193] , formula (29);

[0194] Where cp represents specific heat, and its unit is (kilojoules per kilogram degrees Celsius); Indicates the supply and return water temperature difference of the fluid passing through the cold and hot source equipment, in units of ; For cold sources, the formula uses a plus sign, and for hot sources, the formula uses a minus sign. The first term on the right side of the formula is Indicates the absolute value of the net cooling and heating power ; The second term on the right side of the formula Represents the heat dissipation power caused by the fluid pressure drop.

[0195] In some embodiments, in order to simplify the consideration, the heat dissipation power can be ignored, that is, the net cold and heat source power is used to replace the gross cold and heat source power, and formula (29) becomes:

[0196] , formula (30);

[0197] In the formula, Indicates the net cooling and heating power. The above formula shows that the temperature difference between the inlet and outlet of the cold and hot sources can represent the power of the cold and hot sources.

[0198] In some embodiments, the device power consumption ratio of cold to hot , Pipeline power consumption, cooling and heating ratio , and system power consumption ratio The definitions are:

[0199] , formula (31);

[0200] , formula (32);

[0201] , formula (33);

[0202] Indicates the ratio of power consumption of the equipment to heat; Indicates the cooling and heating ratio of the pipeline power consumption; Indicates the system power consumption cold-heat ratio; Indicates gross cooling and heating power; Indicates the power of the device; Indicates effective power, that is, pipeline power; represents system power; H represents pump head; g represents gravitational acceleration; represents the pump efficiency; cp represents the specific heat; It indicates the supply and return water temperature difference of the fluid passing through the cold and heat source equipment; among them, the equipment power consumption cold-heat ratio is used to characterize the power consumption cold-heat ratio of the equipment of any secondary subsystem, the pipeline power consumption cold-heat ratio is used to characterize the power consumption cold-heat ratio of the pipeline of any secondary subsystem, and the system power consumption cold-heat ratio is used to characterize the primary subsystem energy efficiency of any primary subsystem, or the secondary subsystem energy efficiency of any secondary subsystem.

[0203] In some embodiments, it should be noted that the power consumption ratios (including equipment power consumption ratio, pipeline power consumption ratio, and system power consumption ratio) in formula (31) to formula (33) are all expressed by pipeline state parameters, so the system energy efficiency (such as target system energy efficiency) expressed by these power consumption ratios is also expressed by pipeline state parameters. Figure 8 For the heat and cold transport circulation piping system shown in the figure, the pump head is used in formulas (31) to (33). , Pump efficiency , the supply and return water temperature difference of the fluid passing through the cold and hot source equipment (which can be referred to as the temperature difference between cold and hot sources) and other pipeline state parameters represent the power consumption and heat ratio of equipment, pipelines and systems. Substituting according to the above formula, we can get:

[0204] , formula (34);

[0205] It should be noted that the system in formula (33) to formula (34) can be set as any secondary subsystem according to the needs, and the pipeline state parameters of the secondary subsystem can be obtained to calculate the corresponding system power consumption cooling and heating ratio , that is, the above-mentioned power consumption ratio of the secondary subsystem (such as the power consumption ratio of the cooling water system, the power consumption ratio of the cooling tower system, etc.) is obtained. The power consumption ratio of each secondary subsystem can be directly calculated by the thermodynamic and hydraulic state parameters of the pipeline of the secondary subsystem (such as system resistance, temperature difference between cold and hot sources, water pump efficiency, etc.), and then combined with the energy efficiency of the refrigerator, the cold loss rate of the pipe network, etc., which simplifies the calculation of the energy efficiency of the secondary subsystem.

[0206] In some embodiments, the power consumption cold-heat ratio is a dimensionless characteristic value. Formula (31) to Formula (33) represent the power consumption cold-heat ratio similarity criterion. Specifically, Formula (31) to Formula (33) reflect the coupling law of thermal phenomena and hydraulic phenomena, and are a similarity criterion, reflecting the influence of thermal and hydraulic coupling on the efficiency of heat transfer, not limited to specific working conditions or specific conditions, reflecting the essence and law of the relationship between the two physical phenomena, and having universal significance. The system energy efficiency equation expressed by the above power consumption cold-heat ratio similarity criterion, that is, Formula (2), Formula (7) and Formula (8), is a similarity criterion equation, reflecting the influence of the similarity criterion of each subsystem on the system energy efficiency, and is the relationship between the local and the whole system; according to Formula (3), Formula (10) and Formula (13), it reflects the similarity between different levels of the system (such as the first-level subsystem and the second-level subsystem). In one embodiment, the power consumption cooling-heating ratio similarity criterion can be used for energy efficiency analysis of pipelines, subsystems, and overall systems. It can be used to analyze the rules of the same subsystem, compare the energy efficiency of systems at different levels, and compare the energy efficiency of district cooling systems with different processes. It can be widely used in energy efficiency design and operation analysis of refrigeration systems (such as district cooling systems and air-conditioning systems).

[0207] In some embodiments, according to formula (2), formula (7), formula (8), formula (29), and formula (31) to formula (33), when analyzing the energy efficiency of the system, it is not a single physical quantity (such as the supply and return water temperature difference, the pressure drop of the pipeline system, etc.) that plays a role separately, but multiple physical quantities such as the supply and return water temperature difference and the pressure drop of the pipeline system play a role in the system energy efficiency at the same time, that is, the power consumption cold-heat ratio criterion composed of multiple physical quantities is at work. Therefore, there is a large uncertainty in analyzing the impact of a single physical quantity such as the supply and return water temperature difference or the water pump head on the system energy efficiency. In view of the above problems, the embodiment of the present application comprehensively considers the impact of the energy efficiency of the secondary subsystem on the energy efficiency of the primary subsystem, and then further considers the impact of the energy efficiency of the primary subsystem on the energy efficiency of the target system, thereby improving the accuracy and reliability of the system energy efficiency analysis and simplifying the analysis process of the factors affecting the system energy efficiency. For example, when analyzing the operation data, the embodiment of the present application adopts the power consumption cold-heat ratio criterion to organize the operation data of the target system, which can measure the data purposefully, greatly simplify the analysis process of the factors affecting the system energy efficiency, and improve the accuracy of the analysis and diagnosis of the operation data. In another embodiment, the embodiment of the present application can also be applied to application scenarios such as big data analysis. For example, in big data analysis, a smaller amount of target system data (such as the above-mentioned physical quantity) can be used to grasp the essence and laws of physical phenomena, shorten the AI ​​(artificial intelligence) optimization process, and shorten the time for model optimization and energy efficiency analysis.

[0208] See also Fig. 9 The embodiment of the present application further provides a district cooling system energy efficiency analysis device, which can implement the above district cooling system energy efficiency analysis method, and the device includes:

[0209] The target system acquisition module 901 is used to acquire the target system; wherein the target system includes at least two primary subsystems and a refrigerator, each primary subsystem includes at least one secondary subsystem, and the refrigerator is connected between the two primary subsystems;

[0210] A primary subsystem energy efficiency analysis module 902 is used to perform primary subsystem energy efficiency analysis according to the secondary subsystem energy efficiencies of each secondary subsystem corresponding to each primary subsystem, and obtain the primary subsystem energy efficiency of the primary subsystem;

[0211] The cold storage mode system energy efficiency analysis module 903 is used to perform a first system energy efficiency analysis according to the cold storage refrigerant system power consumption to heat ratio, the cooling and heat dissipation system power consumption to heat ratio, and the refrigerator energy efficiency of the refrigerator to obtain the cold storage mode system energy efficiency, and determine the cold storage mode system energy efficiency as the target system energy efficiency if the energy efficiency of each primary subsystem corresponding to the target system includes the cold storage refrigerant system power consumption to heat ratio and the cooling and heat dissipation system power consumption to heat ratio, and the refrigerator energy efficiency;

[0212] The cooling mode system energy efficiency analysis module 904 is used to obtain the cold storage mode system energy efficiency if the energy efficiencies of each first-level subsystem corresponding to the target system include the cold-to-heat ratio of the power consumption of the cold transmission system and the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, and perform a second system energy efficiency analysis based on the cold storage mode system energy efficiency, the cold-to-heat ratio of the power consumption of the cold transmission system, the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, and the refrigeration machine energy efficiency to obtain the cooling mode system energy efficiency, and determine the cooling mode system energy efficiency as the target system energy efficiency.

[0213] The specific implementation of the regional cooling system energy efficiency analysis device is basically the same as the specific implementation of the above-mentioned regional cooling system energy efficiency analysis method, and will not be repeated here.

[0214] The embodiment of the present application also provides an electronic device, the electronic device includes a memory and a processor, the memory stores a computer program, and the processor implements the above-mentioned district cooling system energy efficiency analysis method when executing the computer program. The electronic device may include any intelligent terminal such as a tablet computer and a car computer.

[0215] See also Fig.10 , Fig.10 The hardware structure of an electronic device of another embodiment is illustrated, and the electronic device includes:

[0216] The processor 1001 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;

[0217] The memory 1002 may be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1002 may store an operating system and other application programs. When the technical solution provided in the embodiments of this specification is implemented by software or firmware, the relevant program code is stored in the memory 1002, and the processor 1001 calls and executes the district cooling system energy efficiency analysis method of the embodiment of this application;

[0218] Input / output interface 1003, used to implement information input and output;

[0219] Communication interface 1004, used to realize communication interaction between the device and other devices, which can be realized through wired mode (such as USB, network cable, etc.) or wireless mode (such as mobile network, WIFI, Bluetooth, etc.);

[0220] A bus 1005 , which transmits information between various components of the device (e.g., the processor 1001 , the memory 1002 , the input / output interface 1003 , and the communication interface 1004 );

[0221] The processor 1001 , the memory 1002 , the input / output interface 1003 and the communication interface 1004 are connected to each other in communication within the device via the bus 1005 .

[0222] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the above-mentioned regional cooling system energy efficiency analysis method is implemented.

[0223] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0224] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0225] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0226] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0227] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0228] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0229] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0230] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. The mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0231] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0232] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0233] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including multiple instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store programs.

[0234] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. A method for analyzing energy efficiency of a district cooling system, characterized in that: The method comprises: Acquire a target system; wherein the target system includes at least two primary subsystems and a refrigerator, each of the primary subsystems includes at least one secondary subsystem, and the refrigerator is connected between the two primary subsystems; According to the secondary subsystem energy efficiencies of each of the secondary subsystems corresponding to each of the primary subsystems, a primary subsystem energy efficiency analysis is performed to obtain the primary subsystem energy efficiency of the primary subsystem; If the energy efficiency of each of the primary subsystems corresponding to the target system includes a cold-to-heat ratio of the power consumption of the cold storage refrigerant system and a cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, a first system energy efficiency analysis is performed according to the cold-to-heat ratio of the power consumption of the cold storage refrigerant system, the cold-to-heat ratio of the power consumption of the cooling and heat dissipation system, and the refrigerator energy efficiency of the refrigerator to obtain the cold storage mode system energy efficiency, and the cold storage mode system energy efficiency is determined as the target system energy efficiency; If the energy efficiency of each of the first-level subsystems corresponding to the target system includes the power consumption cold-to-heat ratio of the cold transmission system and the power consumption cold-to-heat ratio of the cooling and heat dissipation system, then the energy efficiency of the cold storage mode system is obtained; An average energy efficiency is calculated based on the energy efficiency of the cold storage mode system and the gross cold storage load of the cold storage tank to obtain an average cold storage energy efficiency; The cold storage and cooling load ratio is obtained by calculating the ratio of the gross cold source load of the cold storage tank and the total gross cooling load of the cold source of the cold energy transmission system; Performing system energy efficiency analysis according to the average cold storage energy efficiency, the cold storage cooling load ratio, the cold transmission system power consumption to heat ratio, the cooling and heat dissipation system power consumption to heat ratio, and the refrigeration machine energy efficiency, obtaining a cooling mode system energy efficiency, and determining the cooling mode system energy efficiency as the target system energy efficiency; The definition of the energy efficiency of the cooling mode system is as follows: ， Indicates the energy efficiency of the cooling mode system; Indicates the power consumption cooling / heating ratio of the cooling transmission system; Indicates the heat dissipation and cold loss rate of the external pipe network of the cold transmission system; represents the energy efficiency of the refrigerator; Indicates the cold storage and cooling load ratio; Indicates the power consumption ratio of the cooling and heat dissipation system; represents the average energy efficiency of the cold storage; Among them, the heat dissipation and cold loss rate of the external pipe network of the cold transmission system is defined as: ， Indicates the heat dissipation and cold loss rate of the external pipe network of the cold water system; Indicates the cold storage and cooling load ratio; Indicates the cooling / heating ratio of the chilled water system power consumption; It indicates the ratio of power consumption of glycol system to heat consumption; The secondary subsystem corresponding to the cold transport system includes: at least one of a cold water system, a cold water release system, and an ethylene glycol system; The definition of the power consumption cooling-heat ratio of the cooling transmission system is as follows: ， Indicates the power consumption cooling / heating ratio of the cooling transmission system; represents the cooling-heat ratio of the power consumption of the cooling water system, that is, the energy efficiency of the secondary subsystem of the cooling water system; represents the cooling-heating ratio of the ethylene glycol system power consumption, that is, the energy efficiency of the secondary subsystem of the ethylene glycol system; represents the cooling-heating ratio of the power consumption of the chilled water system, that is, the energy efficiency of the secondary subsystem of the chilled water system; represents the cold storage and cooling load ratio, and The value range is When the secondary subsystem corresponding to the cold transport system does not include the ethylene glycol system and the cold water release system, and ; Among them, the cold storage and cooling load ratio is defined as: ， Indicates the gross cold source load of the cold storage tank; Represents the total gross cooling load of the cold sources in the cold transport system.

2. The method according to claim 1, characterized in that The system energy efficiency analysis is performed based on the average cold storage energy efficiency, the cold storage cooling load ratio, the cold transmission system power consumption cold-heat ratio, the cooling and heat dissipation system power consumption cold-heat ratio, and the refrigeration machine energy efficiency to obtain the cooling mode system energy efficiency, including: Calculate the heat dissipation loss rate according to the cold storage and cooling load ratio and the energy efficiency of the secondary subsystem corresponding to the cold transmission system to obtain the heat dissipation loss rate of the external pipe network of the cold transmission system; Constructing a first system energy efficiency relational expression according to the heat dissipation cold loss rate of the external pipe network of the cold transmission system and the power consumption cold-heat ratio of the cold transmission system; Constructing a second system energy efficiency relationship according to the cold storage and cooling load ratio, the refrigeration machine energy efficiency, the cooling and heat dissipation system power consumption ratio, the cold storage average energy efficiency, and the cold transmission system power consumption ratio; A cooling mode system energy efficiency analysis model is constructed according to the first system energy efficiency relationship equation and the second system energy efficiency relationship equation, and the cooling mode system energy efficiency is determined according to the cooling mode system energy efficiency analysis model.

3. The method according to any one of claims 1 to 2, characterized in that: The energy efficiency of the cold storage mode system is defined as follows: ， Indicates the energy efficiency of the cold storage mode system; Indicates the power consumption ratio of the cold storage refrigerant system to heat; Indicates the power consumption ratio of the cooling and heat dissipation system; Indicates the energy efficiency of the refrigerator.

4. The method according to any one of claims 1 to 2, characterized in that: Each of the primary subsystems includes a cooling and heat dissipation system, and the secondary subsystem corresponding to the cooling and heat dissipation system includes a cooling water system and a cooling tower system; The definition of the cooling and heat ratio of the cooling and heat dissipation system power consumption is shown in the following formula: ， Indicates the power consumption ratio of the cooling and heat dissipation system; represents the cooling-to-heat ratio of the cooling water system power consumption, that is, the energy efficiency of the secondary subsystem of the cooling water system; represents the cooling-to-heat ratio of the cooling tower system power consumption, that is, the energy efficiency of the secondary subsystem of the cooling tower system; Indicates the energy efficiency of the refrigerator.

5. The method according to any one of claims 1 to 2, characterized in that: Each of the primary subsystems includes a cold storage and coolant system; the secondary subsystem corresponding to the cold storage and coolant system includes any one of an ice storage system and a water storage system; The definition of the power consumption cooling-heat ratio of the cold storage refrigerant system is as follows: ， Indicates the power consumption ratio of the cold storage refrigerant system to heat; represents the power consumption of the cold storage coolant system pump; if the secondary subsystem corresponding to the cold storage coolant system is the ice storage system, then represents the power consumption of the glycol pump. If the secondary subsystem corresponding to the cold storage coolant system is the water cold storage system, then Indicates the power consumption of the cold storage water pump; Indicates the gross refrigeration load of the chiller; The definitions of equipment power consumption cooling-heating ratio, pipeline power consumption cooling-heating ratio, and system power consumption cooling-heating ratio are: ， ， ， Indicates the power consumption ratio of the device to heat; Indicates the cooling and heating ratio of the power consumption of the pipeline; Indicates the power consumption cooling to heating ratio of the system; Indicates gross cooling and heating power; Indicates the power of the device; Indicates effective power, that is, pipeline power; represents system power; H represents pump head; g represents gravitational acceleration; Indicates the efficiency of the pump; represents specific heat; Represents the supply and return water temperature difference of the fluid passing through the cold and heat source equipment; wherein, the equipment power consumption cold-heat ratio is used to characterize the power consumption cold-heat ratio of the equipment of any of the secondary subsystems, the pipeline power consumption cold-heat ratio is used to characterize the power consumption cold-heat ratio of the pipeline of any of the secondary subsystems, and the system power consumption cold-heat ratio is used to characterize the primary subsystem energy efficiency of any of the primary subsystems, or the secondary subsystem energy efficiency of any of the secondary subsystems.

6. A district cooling system energy efficiency analysis device, characterized in that: The device comprises: A target system acquisition module, used to acquire a target system; wherein the target system includes at least two primary subsystems and a refrigerator, each of the primary subsystems includes at least one secondary subsystem, and the refrigerator is connected between the two primary subsystems; A primary subsystem energy efficiency analysis module, used to perform primary subsystem energy efficiency analysis according to the secondary subsystem energy efficiencies of each of the secondary subsystems corresponding to each of the primary subsystems, to obtain the primary subsystem energy efficiency of the primary subsystem; A cold storage mode system energy efficiency analysis module is used for, if the energy efficiencies of each of the primary subsystems corresponding to the target system include a cold storage refrigerant system power consumption to heat ratio and a cooling and heat dissipation system power consumption to heat ratio, performing a first system energy efficiency analysis according to the cold storage refrigerant system power consumption to heat ratio, the cooling and heat dissipation system power consumption to heat ratio, and the refrigerator energy efficiency of the refrigerator, to obtain the cold storage mode system energy efficiency, and determining the cold storage mode system energy efficiency as the target system energy efficiency; The cooling mode system energy efficiency analysis module is used to obtain the cooling mode system energy efficiency if the energy efficiency of each of the first-level subsystems corresponding to the target system includes the power consumption cold-to-heat ratio of the cooling transmission system and the power consumption cold-to-heat ratio of the cooling and heat dissipation system; perform average energy efficiency calculation based on the cooling mode system energy efficiency and the gross cooling load of the cooling storage tank to obtain the average cooling energy efficiency; perform proportional calculation based on the gross cold source load of the cooling storage tank of the cooling transmission system and the total gross cooling load of the cold source to obtain the cooling storage cooling load ratio; perform system energy efficiency analysis based on the average cooling energy efficiency, the cooling storage cooling load ratio, the power consumption cold-to-heat ratio of the cooling transmission system, the power consumption cold-to-heat ratio of the cooling and heat dissipation system, and the refrigeration machine energy efficiency to obtain the cooling mode system energy efficiency, and determine the cooling mode system energy efficiency as the target system energy efficiency; The definition of the energy efficiency of the cooling mode system is as follows: ， Indicates the energy efficiency of the cooling mode system; Indicates the power consumption cooling / heating ratio of the cooling transmission system; Indicates the heat dissipation and cold loss rate of the external pipe network of the cold transmission system; represents the energy efficiency of the refrigerator; Indicates the cold storage and cooling load ratio; Indicates the power consumption ratio of the cooling and heat dissipation system; represents the average energy efficiency of the cold storage; Among them, the heat dissipation and cold loss rate of the external pipe network of the cold transmission system is defined as: ， Indicates the heat dissipation and cold loss rate of the external pipe network of the cold water system; Indicates the cold storage and cooling load ratio; Indicates the cooling / heating ratio of the chilled water system power consumption; It indicates the ratio of power consumption of glycol system to heat consumption; The secondary subsystem corresponding to the cold transport system includes: at least one of a cold water system, a cold water release system, and an ethylene glycol system; The definition of the power consumption cooling-heat ratio of the cooling transmission system is as follows: ， Indicates the power consumption cooling / heating ratio of the cooling transmission system; represents the cooling-heat ratio of the power consumption of the cooling water system, that is, the energy efficiency of the secondary subsystem of the cooling water system; represents the cooling-heating ratio of the ethylene glycol system power consumption, that is, the energy efficiency of the secondary subsystem of the ethylene glycol system; represents the cooling-heating ratio of the power consumption of the chilled water system, that is, the energy efficiency of the secondary subsystem of the chilled water system; represents the cold storage and cooling load ratio, and The value range is When the secondary subsystem corresponding to the cold transport system does not include the ethylene glycol system and the cold water release system, and ; Among them, the cold storage and cooling load ratio is defined as: ， Indicates the gross cold source load of the cold storage tank; Represents the total gross cooling load of the cold sources in the cold transport system.

7. An electronic device, characterized in that: The electronic device includes a memory and a processor, the memory stores a computer program, and the processor implements the regional cooling system energy efficiency analysis method according to any one of claims 1 to 5 when executing the computer program.

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