A method and system for night cold storage of a regional cold product

Abstract

The present disclosure provides a nighttime cold storage method and system for regional cold products. The nighttime cold storage method includes: summarizing the types and quantities of cold products in a certain area; summarizing the number and distribution of pipelines and water storage facilities in a certain area; dividing a certain area into several cold storage areas according to the types and quantities of the cold products, the number and distribution of the pipelines and water storage facilities; and selecting open pipe cold storage, closed pipe cold storage, or water storage facility cold storage for each cold storage area. The nighttime cold storage system is based on the above-mentioned nighttime cold storage method. The present invention gathers cold products and cold storage facilities in a region, rationally configures cold products and cold storage facilities, and selects a suitable cold storage method for each cold storage area at night, thereby achieving sufficient storage of cold energy at night for use by daytime cold users.

Description

Technical Field

[0001] Regional energy is a set of energy solutions that optimizes the allocation of traditional and new energy sources based on the energy structure and energy endowment of a certain region, combines advanced technologies such as waste heat utilization, heat pumps, and energy storage, and fully utilizes high- and low-grade energy to provide urban end users with cooling, heating, electricity and other products to achieve energy conservation and emission reduction goals.

[0002] Regional energy systems can improve a city’s energy supply resilience, promote energy security, ensure energy supply, and ultimately assist in the green transformation of the economy.

[0003] A branch of regional energy systems is the seasonal cold storage system based on cold storage technology. This technology can alleviate the imbalance of peak and valley loads in the power grid. Currently, common cold storage technologies include water storage and ice storage. Water storage uses sensible heat to store cold, resulting in a temperature difference of only 5-7°C, a low cold density, and a large floor space. Ice storage, on the other hand, involves a phase change in the coolant, resulting in a complex refrigeration process and low cooling capacity utilization.

[0004] In view of this, it is crucial to develop a cold storage method and cold storage system that can store a large amount of cold energy. Background Art Summary of the Invention

[0005] The purpose of the present invention is to provide a nighttime cold storage method and system for regional cold products, gather cold products and cold storage facilities in the region, reasonably configure cold products and cold storage facilities, select appropriate cold storage methods for each cold storage area at night, and fully store cold energy at night for use by cold users during the day.

[0006] The technical solutions for achieving the purpose of the present invention are as follows:

[0007] In one aspect, a nighttime cold storage method for a regional cold product is provided, comprising:

[0008] Summarize the types and quantities of cold-cooling products in a certain area;

[0009] Summarize the number and distribution of pipeline networks and water storage facilities in a certain area;

[0010] Divide a region into several cold storage areas according to the types and quantities of the cold products, the number and distribution of the pipe network and the water storage facilities;

[0011] For each cold storage area, choose open pipe cold storage, closed pipe cold storage or water storage facility cold storage.

[0012] Based on one aspect, in a possible implementation, summarizing the types and quantities of refrigeration products in a certain area includes:

[0013] Types of refrigeration products in a certain region include: industrial refrigeration equipment, household refrigeration equipment;

[0014] The number of refrigeration products in a certain area includes: the number of industrial refrigeration equipment and / or household refrigeration equipment in each of the cold storage areas.

[0015] Based on one aspect, in a possible implementation, summarizing the number and distribution of pipeline networks and water storage facilities in a certain area includes:

[0016] The number and distribution of pipe networks in a certain area include: the number of open pipes in a certain area, the layout path of each open pipe, which open pipes can be used for closed pipe cold storage, and the layout path of each closed pipe;

[0017] The number and distribution of water storage facilities in a certain area include: how many fire water pools are there in a certain area, and the distance between each fire water pool and the open pipes and closed pipes; how many mobile water pools are there in a certain area, and the distance between each mobile water pool and the open pipes and closed pipes; how many water storage tanks are there in a certain area, and the distance between each water storage tank and the open pipes and closed pipes.

[0018] Based on one aspect, in a possible implementation, dividing a certain area into a plurality of cold storage areas includes dividing the certain area into a plurality of cold storage areas according to the following parameter configurations:

[0019] Industrial refrigeration equipment, household refrigeration equipment, the respective number of industrial refrigeration equipment and / or household refrigeration equipment in a certain area, the number of open pipes in a certain area, the layout path of each open pipe, which open pipes can be used as closed pipe cold storage, the layout path of each closed pipe, the number of fire water pools in a certain area, the distance between each fire water pool and the open pipes and closed pipes; the number of mobile water pools in a certain area, the distance between each mobile water pool and the open pipes and closed pipes; the number of water storage tanks in a certain area, the distance between each water storage tank and the open pipes and closed pipes.

[0020] Based on one aspect, in a possible implementation, each cold storage area is selected to use open pipe cold storage, closed pipe cold storage, or water storage facility cold storage, including:

[0021] At least one cold storage area is an open pipe cold storage area, and the cold storage area corresponding to the open pipe cold storage area has at least one open pipe, and the open pipe close to the cold product is connected to the cold product;

[0022] At least one cold storage area is a closed pipe cold storage area. The cold storage area corresponding to the closed pipe cold storage area has at least one open pipe with shut-off valves at both ends. After the two shut-off valves are closed, the middle pipe is used as a closed pipe cold storage area.

[0023] At least one cold storage area is used to store cold water in a water storage facility. There is at least one fire water pool, mobile water pool or water tank in the cold storage area corresponding to the water storage facility, and the fire water pool, mobile water pool and water tank are all provided with an outer insulation layer. The fire water pool, mobile water pool or water tank is arranged close to at least two open pipes.

[0024] In another aspect, a nighttime cold storage system for a regional cold product is provided, comprising at least one open-pipe cold storage system, at least one closed-pipe cold storage system, and at least one water storage facility cold storage system;

[0025] The open pipe cold storage system draws water from an open pipe at night and flows it through the cold product to generate cold energy, and the open pipe cold storage system stores the cold energy in another open pipe;

[0026] The closed-pipe cold storage system cuts the two ends of the two pipes into a first closed pipe section and a second closed pipe section, which are connected by a connecting pipe. The closed-pipe cold storage system draws water from the first closed pipe section at night and flows it through the cold product to generate cold energy. The closed-pipe cold storage system stores the cold energy in the second closed pipe section. The water in the first closed pipe section flows through the connecting pipe into the second closed pipe section for mixing. The water in the second closed pipe section flows through the connecting pipe into the first closed pipe section for mixing.

[0027] The water storage facility cold storage system draws water from the water storage facility at night and flows it through the cold product for refrigeration to generate cold energy. The open pipe cold storage system stores the cold energy in the water storage facility.

[0028] Based on another aspect, in a possible implementation, the open pipe cold storage system includes: a heating water supply pipe and a heating return water pipe arranged in the same cold storage area, and at least one refrigeration device for storing cold water in the heating water supply pipe, wherein the refrigeration device is at least one of an industrial refrigeration device and a household refrigeration device;

[0029] The refrigeration equipment is communicated with the heating water supply main via a first pipeline, and the refrigeration equipment is communicated with the heating water return main via a second pipeline.

[0030] In this embodiment, the heating water supply main acts as a cold storage container to store the cold energy generated by the refrigeration equipment. At night, the refrigeration equipment cools the return water and stores it in the heating water supply main. In other words, at night, this embodiment uses one open pipe to draw water from another open pipe, cools it through the refrigeration equipment, and then stores the cold. The cold storage pipe (first pipe) and the return water pipe (second pipe) do not mix, resulting in better water temperature control and effective cold storage.

[0031] Based on another aspect, in a possible implementation, the closed pipe cold storage system includes: a portion of a heating water supply pipe serving as a first cold storage chamber, a connecting pipe serving as a second cold storage chamber, and a portion of a heating water return pipe serving as a third cold storage chamber; the portion of the heating water supply pipe, the connecting pipe, and the portion of the heating water return pipe are all located in the same cold storage area;

[0032] The connecting pipe connects part of the heating water supply pipe and part of the heating water return pipe, so that the first cold storage chamber, the second cold storage chamber and the third cold storage chamber are connected in sequence; the first cold storage chamber, the second cold storage chamber and the third cold storage chamber together form a cold storage container; the cold storage container is connected to the cold storage system and the cold release system;

[0033] A first shut-off valve is added to one end of the heating water supply pipe, and a second shut-off valve is added to the other end of the heating water supply pipe. The water supply pipe section between the first shut-off valve and the second shut-off valve is the first cold storage chamber, and the water supply pipe section between the first shut-off valve and the second shut-off valve is also the heating water supply pipe;

[0034] A third shut-off valve is added to one end of the heating return pipe, and a fourth shut-off valve is added to the other end of the heating return pipe. The return pipe section between the third and fourth shut-off valves is the third cold storage chamber, and the return pipe section between the third and fourth shut-off valves is also the heating return pipe.

[0035] One end of the connecting pipe is connected to the heating water supply pipe between the first shutoff valve and the second shutoff valve, and the other end of the connecting pipe is connected to the heating return pipe between the third shutoff valve and the fourth shutoff valve.

[0036] Based on another aspect, in one possible implementation, the water storage facility cold storage system includes: a first fire water tank, a second fire water tank, a first plate heat exchanger, a second plate heat exchanger, and a first heat pump; the first fire water tank exchanges heat with a first chiller through the first plate heat exchanger, and the first chiller is an existing chiller in the building;

[0037] The first fire water pool and the second fire water pool are located in the basement of the same building, and at least one equipment room is separated from the first fire water pool and the second fire water pool;

[0038] The first heat pump is arranged close to the first fire water pool or the second fire water pool; the first fire water pool and the second fire water pool exchange heat through the first heat pump;

[0039] When the water temperature in the first fire water pool is lower than the water temperature in the second fire water pool, the first heat pump forces heat to flow from the first fire water pool to the second fire water pool.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The present invention gathers cold products and cold storage facilities in the area, reasonably configures cold products and cold storage facilities, selects a suitable cold storage method for each cold storage area at night, and realizes sufficient storage of cold energy at night for use by cold users during the day. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A flow chart of a nighttime cold storage method for regional end users provided by the present invention;

[0043] Figure 2 A flow chart of a nighttime cold storage system for regional end users provided by the present invention;

[0044] Figure 3 This is a functional block diagram of the open-pipe cold storage system provided by the present invention;

[0045] Figure 4 This is a functional block diagram of the closed-pipeline cold storage system provided by the present invention;

[0046] Figure 5 This is a functional block diagram of the cold storage system of the water storage facility provided by the present invention. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0048] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0049] The keyword "and / or" involved in this embodiment represents two situations, and, or. In other words, A and / or B mentioned in the embodiment of the present invention represent two situations, A and B, and A or B, and describe the three states of A and B. For example, A and / or B means: only A is included but not B; only B is included but not A; and both A and B are included.

[0050] At the same time, in the embodiments of the present invention, when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected or communicated" with another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on or installed on" another component, it may be directly set / installed on the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the present invention.

[0051] It should be noted that, in order to explain the present invention in more detail so that those skilled in the art can understand the present invention more clearly and understandably, and further support the technical problems to be solved by the present invention and the corresponding technical effects to be achieved, the following explanations of the terminology involved are given before introducing the present invention:

[0052] The return network refers to the section of the circulating piping system that carries only circulating flow. Specifically, there are two pipes from the water supply point to the outlet: the supply network and the return network. After a certain period of time, the water in the supply network cools down or warms up, and a pump recycles the water from the return network for reheating or cooling. Energy-generating equipment refers to heat source or cooling equipment. Cooling or heat supply is generally achieved through an intermediate carrier, called a "refrigerant" or "heating medium." Common refrigerants include refrigerants (ammonia, Freon, etc.), water (cold water), and brine (sodium chloride, etc.). Common heating media include water (hot water or steam) and coal. Equipment that produces refrigerant is called a cooling source (or refrigeration equipment), while equipment that produces heat medium is called a heat source. Heat source equipment, such as local boiler rooms, regional boiler rooms, and thermal power plants, generates heat. Cooling source equipment, such as chillers, uses various refrigeration units to produce low-temperature chilled water to provide cooling to air conditioning systems.

[0053] Those skilled in the art will appreciate that the terms "return water," "supply water," and "connection" do not limit the functions of the "pipes," but rather serve to distinguish them. In other words, the return water pipe, supply water pipe, and connecting pipe may all be the same type of pipe, or different types of pipes, or partially identical and partially different. The present invention does not impose any such limitations; any pipe capable of transporting liquids is suitable for use in the present invention and falls within its scope of protection.

[0054] See also Figure 1The embodiment of the present disclosure provides a nighttime cold storage method for regional cold products, including: summarizing the types and quantities of cold products in a certain area; summarizing the number and distribution of pipeline networks and water storage facilities in a certain area; dividing the certain area into a number of cold storage areas according to the types and quantities of cold products, the number and distribution of pipeline networks and water storage facilities; and selecting open pipe cold storage, closed pipe cold storage, or water storage facility cold storage for each cold storage area.

[0055] The above summary of the types and quantities of refrigeration products in a certain area includes: the types of refrigeration products in a certain area include: industrial refrigeration equipment, household refrigeration equipment; the number of refrigeration products in a certain area includes: the number of industrial refrigeration equipment and / or household refrigeration equipment in each cold storage area.

[0056] The above summary of the number and distribution of pipelines and water storage facilities in a certain area includes: the number and distribution of pipelines in a certain area, including: how many open pipelines there are in a certain area, the layout path of each open pipeline, which open pipelines can be used as closed pipeline cold storage, and the layout path of each closed pipeline; the number and distribution of water storage facilities in a certain area include: how many fire water pools there are in a certain area, the distance of each fire water pool from the open pipeline and the closed pipeline; how many mobile water pools there are in a certain area, the distance of each mobile water pool from the open pipeline and the closed pipeline; how many water storage tanks there are in a certain area, and the distance of each water storage tank from the open pipeline and the closed pipeline.

[0057] The above-mentioned division of a certain area into a number of cold storage areas includes dividing a certain area into a number of cold storage areas according to the following parameter configurations:

[0058] Industrial refrigeration equipment, household refrigeration equipment, the number of industrial refrigeration equipment and / or household refrigeration equipment in a certain area, the number of open pipes in a certain area, the layout path of each open pipe, which open pipes can be used as closed pipe cold storage, the layout path of each closed pipe, the number of fire water pools in a certain area, the distance between each fire water pool and the open pipes and closed pipes; the number of mobile water pools in a certain area, the distance between each mobile water pool and the open pipes and closed pipes; the number of water storage tanks in a certain area, the distance between each water storage tank and the open pipes and closed pipes.

[0059] For each cold storage area, open pipe cold storage, closed pipe cold storage or water storage facility cold storage is selected, including:

[0060] At least one cold storage area is an open pipe cold storage area. The cold storage area corresponding to the open pipe cold storage area has at least one open pipe, and the open pipe close to the cold product is connected to the cold product.

[0061] At least one cold storage area is a closed pipe cold storage area. The cold storage area corresponding to the closed pipe cold storage area has at least one open pipe with shut-off valves at both ends. After the two shut-off valves are closed, the middle pipe is used as a closed pipe cold storage area.

[0062] At least one cold storage area is used to store cold water in a water storage facility. There is at least one fire water pool, mobile water pool or water tank in the cold storage area corresponding to the water storage facility, and the fire water pool, mobile water pool and water tank are all provided with an outer insulation layer. The fire water pool, mobile water pool or water tank is arranged close to at least two open pipes.

[0063] See also Figure 2 , the embodiment of the present disclosure also provides a nighttime cold storage system for regional cold products, including at least one open-pipe cold storage system, at least one closed-pipe cold storage system and at least one water storage facility cold storage system; the open-pipe cold storage system draws water from an open pipe at night and flows it through the cold product for cooling and generating cold energy, and the open-pipe cold storage system stores the cold energy in another open pipe; the closed-pipe cold storage system cuts the two ends of the two pipes into a first closed pipe section and a second closed pipe section, the first closed pipe section and the second closed pipe section are connected by a connecting pipe, the closed-pipe cold storage system draws water from the first closed pipe section at night and flows it through the cold product for cooling and generating cold energy, and the closed-pipe cold storage system stores the cold energy in the second closed pipe section, the water flow in the first closed pipe section flows through the connecting pipe into the second closed pipe section for mixing, and the water flow in the second closed pipe section flows through the connecting pipe into the first closed pipe section for mixing; the water storage facility cold storage system draws water from the water storage facility at night and flows it through the cold product for cooling and generating cold energy, and the open-pipe cold storage system stores the cold energy in the water storage facility.

[0064] See also Figure 3 The above-mentioned open pipe cold storage system includes: a heating water supply pipe and a heating return water pipe arranged in the same cold storage area, and at least one refrigeration device that stores cold in the heating water supply pipe, and the refrigeration device is at least one of an industrial refrigeration device or a household refrigeration device; the refrigeration device and the heating water supply pipe are connected through a first pipe, and the refrigeration device and the heating return water pipe are connected through a second pipe.

[0065] In this embodiment, the heating water supply main acts as a cold storage container to store the cold energy generated by the refrigeration equipment. At night, the refrigeration equipment cools the return water and stores it in the heating water supply main. In other words, at night, this embodiment uses one open pipe to draw water from another open pipe, cools it through the refrigeration equipment, and then stores the cold. The cold storage pipe (first pipe) and the return water pipe (second pipe) do not mix, resulting in better water temperature control and effective cold storage.

[0066] The preferred refrigeration equipment includes a heat pump and a plate heat exchanger. The heat pump and the plate heat exchanger are connected to form a first circulation loop. The plate heat exchanger, the first pipe, the second pipe, the heating water supply pipe, and the heating water return pipe are interconnected to form a second circulation loop. The first and second circulation loops exchange heat in the plate heat exchanger. In actual use, the heat pump and the plate heat exchanger of the embodiments of the present disclosure cooperate to achieve heat exchange.

[0067] In addition to including a heating water supply main, a heating return water main, at least one refrigeration device and at least one indirect cooling unit, the open pipe cold storage system of the embodiment of the present invention preferably also includes at least one indirect heat exchanger; the number of indirect heat exchangers is less than the number of refrigeration devices and indirect cooling units; the refrigeration device and the heating water supply main and the heating return water main indirectly exchange heat through the indirect heat exchanger; the indirect cooling unit and the heating water supply main and the heating return water main indirectly exchange heat through the indirect heat exchanger.

[0068] It should be noted that in the embodiments of the present disclosure, the indirect heat exchanger and the plate heat exchanger can be a single heat exchanger or different heat exchangers. In the case of special piping design, the indirect heat exchanger and the plate heat exchanger can use the same heat exchanger.

[0069] Preferably, a third circulation loop is formed between the heating water supply main, the heating return water main, and the indirect heat exchanger; a fourth circulation loop is formed between the indirect heat exchanger and the refrigeration equipment; and a fifth circulation loop is formed between the indirect heat exchanger and the indirect cold consumption unit. Preferably, the flow direction of the third circulation loop differs during cold storage and cold release conditions; cold storage conditions involve the refrigeration equipment storing cold in the heating water supply main, while cold release conditions involve the heating water supply main releasing cold to the indirect cold consumption unit.

[0070] See also Figure 4The above-mentioned closed pipe cold storage system includes: a part of the heating water supply pipe as the first cold storage chamber, a connecting pipe as the second cold storage chamber, and a part of the heating return water pipe as the third cold storage chamber; the part of the heating water supply pipe, the connecting pipe and the part of the heating return water pipe are all located in the same cold storage area; the connecting pipe connects the part of the heating water supply pipe and the part of the heating return water pipe, so that the first cold storage chamber, the second cold storage chamber and the third cold storage chamber are connected in sequence; the first cold storage chamber, the second cold storage chamber and the third cold storage chamber together form a cold storage container; the cold storage container is connected to the cold storage system and the cold release system; a first shut-off valve is added to one end of the heating water supply pipe, and a second shut-off valve is added to the other end of the heating water supply pipe Two shut-off valves, the water supply pipe section between the first shut-off valve and the second shut-off valve is the first cold storage chamber, and the water supply pipe section between the first shut-off valve and the second shut-off valve is also part of the heating water supply pipe; a third shut-off valve is added to one end of the heating return pipe, and a fourth shut-off valve is added to the other end of the heating return pipe. The return pipe section between the third shut-off valve and the fourth shut-off valve is the third cold storage chamber, and the return pipe section between the third shut-off valve and the fourth shut-off valve is also part of the heating return pipe; one end of the connecting pipe is connected to the heating water supply pipe between the first shut-off valve and the second shut-off valve, and the other end of the connecting pipe is connected to the heating return pipe between the third shut-off valve and the fourth shut-off valve.

[0071] The cold storage container of the disclosed embodiment is connected to a cold storage system and a cold release system, wherein: the cold storage system includes a first cold storage machine, a first cold storage water supply pipe and a first cold storage return pipe, the first cold storage water supply pipe is connected to part of the heating water supply pipe or part of the heating return pipe, the first cold storage return pipe is connected to part of the heating return pipe or part of the heating water supply pipe; a first cold storage circuit is formed between the first cold storage machine, part of the heating water supply pipe and part of the heating return pipe.

[0072] It should be noted that the first cooling machine in the embodiment of the present disclosure can be an existing cooling machine in the building or a newly added cooling machine. In principle, any cooling equipment that can achieve a cooling function can be used in the embodiment of the present disclosure.

[0073] The above-mentioned cold storage system also includes a second cold storage water supply pipe and a second cold storage return pipe. The second cold storage water supply pipe is connected to part of the heating water supply pipe or part of the heating return pipe, and the second cold storage return pipe is connected to part of the heating return pipe or part of the heating supply pipe; a second cold storage circuit is formed between the second cold storage machine, part of the heating supply pipe and part of the heating return pipe.

[0074] It should be noted that the second cooling machine in the embodiment of the present disclosure can be an existing cooling machine in the building or a newly added cooling machine. In principle, any cooling equipment that can achieve a cooling function can be used in the embodiment of the present disclosure.

[0075] The cold storage system includes a second chiller, a second cold storage water supply pipe and a second cold storage return pipe. The second cold storage water supply pipe is connected to part of the heating water supply pipe or part of the heating return pipe, and the second cold storage return pipe is connected to part of the heating return pipe or part of the heating water supply pipe; the second cold storage water supply pipe is also connected to the fire water tank, and the second cold storage return pipe is also connected to the fire water tank; a second cold storage circuit is formed between the second chiller, part of the heating water supply pipe and part of the heating return pipe; a third cold storage circuit is formed between the second chiller and the fire water tank.

[0076] In actual use, it is preferred that the fire water tank located in the basement be set close to some heating water supply pipes and some heating return pipes.

[0077] See also Figure 5 The above-mentioned water storage facility cold storage system includes: a first fire water tank, a second fire water tank, a first plate heat exchanger, a second plate heat exchanger and a first heat pump; the first fire water tank exchanges heat with the first chiller through the first plate heat exchanger, and the first chiller is an existing chiller in the building; the first fire water tank and the second fire water tank are located in the basement of the same building, and there is at least one equipment room between the first fire water tank and the second fire water tank; the first heat pump is arranged near the first fire water tank or the second fire water tank; the first fire water tank and the second fire water tank exchange heat through the first heat pump; when the water temperature in the first fire water tank is lower than the water temperature in the second fire water tank, the first heat pump forces heat to flow from the first fire water tank to the second fire water tank.

[0078] The embodiment of the present invention utilizes the first plate heat exchanger and the first heat pump to cool the water in the first fire water tank at the same time at night and store cold, which has the advantage of a good cold storage effect; in addition, the present disclosure utilizes the existing chiller and the existing fire water tank in the building by adding a heat exchanger, a heat pump and corresponding pipelines to achieve cold storage in the fire water tank at night, which has the advantage of low initial investment cost.

[0079] In addition to including the first fire water tank, the second fire water tank, the first plate heat exchanger, the second plate heat exchanger and the first heat pump, the water storage facility cold storage system of the embodiment of the present disclosure preferably also includes a second plate heat exchanger; the second fire water tank exchanges heat with the second chiller through the second plate heat exchanger, and the second chiller is the original chiller in the building; when the water temperature in the second fire water tank is lower than the water temperature in the first fire water tank, the first heat pump forces heat to flow from the second fire water tank to the first fire water tank.

[0080] For residential buildings, usually the first chiller and the second chiller operate at low load at night. In order to make full use of surplus energy, the present disclosure uses the first chiller for residential use at night, and the idle second chiller stores cold water in the second fire water tank; or the present disclosure uses the second chiller for residential use, and the idle first chiller stores cold water in the first fire water tank; considering that the cold storage efficiency of the first chiller storing cold water in the first fire water tank and the second chiller storing cold water in the second fire water tank is relatively low, the present disclosure also uses the first heat pump to transfer heat in the first fire water tank to the second fire water tank when the first chiller stores cold water in the first fire water tank, or the present disclosure also uses the first heat pump to transfer heat in the second fire water tank to the first fire water tank when the second chiller stores cold water in the second fire water tank.

[0081] For office buildings or commercial buildings, cooling is usually not required at night, and the first and second chillers are idle at night. In order to make full use of surplus energy, the first chiller of the present invention stores cold water in the first fire water tank at night, and the second chiller stores cold water in the second fire water tank at night. The present invention uses the first plate heat exchanger to cool down and store cold water in the first fire water tank at night, and uses the second plate heat exchanger to cool down and store cold water in the second fire water tank at night, which has the advantage of good cold storage effect.

[0082] The above-mentioned water storage facility cold storage system utilizes the existing chiller and the original fire water pool in the building and adds a heat exchanger, a heat pump and corresponding pipelines to achieve nighttime cold storage in the fire water pool, which has the advantage of low investment cost.

[0083] The present invention gathers cold products and cold storage facilities in the area, reasonably configures cold products and cold storage facilities, selects a suitable cold storage method for each cold storage area at night, and realizes sufficient storage of cold energy at night for use by cold users during the day.

[0084] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

[0085] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0086] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A nighttime cold storage method for regional cold products, characterized in that: include: Summarize the types and quantities of cold-cooling products in a certain area; Summarize the number and distribution of pipeline networks and water storage facilities in a certain area; Divide a region into several cold storage areas according to the types and quantities of the cold products, the number and distribution of the pipe network and the water storage facilities; For each cold storage area, choose open pipe cold storage, closed pipe cold storage or water storage facility cold storage; The summary of the types and quantities of refrigerated products in a certain area includes: Types of refrigeration products in a certain region include: industrial refrigeration equipment, household refrigeration equipment; The number of refrigeration products in a certain area includes: the number of industrial refrigeration equipment and / or household refrigeration equipment in each of the cold storage areas; The summary of the number and distribution of pipe networks and water storage facilities in a certain area includes: The number and distribution of pipe networks in a certain area include: the number of open pipes in a certain area, the layout path of each open pipe, which open pipes can be used for closed pipe cold storage, and the layout path of each closed pipe; The number and distribution of water storage facilities in a certain area include: how many fire water pools are there in a certain area, and the distance between each fire water pool and the open pipes and closed pipes; how many mobile water pools are there in a certain area, and the distance between each mobile water pool and the open pipes and closed pipes; how many water storage tanks are there in a certain area, and the distance between each water storage tank and the open pipes and closed pipes.

2. The nighttime cold storage method according to claim 1, characterized in that: The dividing of a certain area into a plurality of cold storage areas includes dividing a certain area into a plurality of cold storage areas according to the following parameter configurations: Industrial refrigeration equipment, household refrigeration equipment, the respective number of industrial refrigeration equipment and / or household refrigeration equipment in a certain area, the number of open pipes in a certain area, the layout path of each open pipe, which open pipes can be used as closed pipe cold storage, the layout path of each closed pipe, the number of fire water pools in a certain area, the distance between each fire water pool and the open pipes and closed pipes; the number of mobile water pools in a certain area, the distance between each mobile water pool and the open pipes and closed pipes; the number of water storage tanks in a certain area, the distance between each water storage tank and the open pipes and closed pipes.

3. The nighttime cold storage method according to claim 1, characterized in that: For each cold storage area, choose open pipe cold storage, closed pipe cold storage or water storage facility cold storage, including: At least one cold storage area is an open pipe cold storage area, and the cold storage area corresponding to the open pipe cold storage area has at least one open pipe, and the open pipe close to the cold product is connected to the cold product; At least one cold storage area is a closed pipe cold storage area. The cold storage area corresponding to the closed pipe cold storage area has at least one open pipe with shut-off valves at both ends. After the two shut-off valves are closed, the middle pipe is used as a closed pipe cold storage area. At least one cold storage area is used to store cold water in a water storage facility. There is at least one fire water pool, mobile water pool or water tank in the cold storage area corresponding to the water storage facility, and the fire water pool, mobile water pool and water tank are all provided with an outer insulation layer. The fire water pool, mobile water pool or water tank is arranged close to at least two open pipes.

4. A nighttime cold storage system for regional cold products, characterized in that: It includes at least one open pipe cold storage system, at least one closed pipe cold storage system and at least one water storage facility cold storage system; The open pipe cold storage system draws water from an open pipe at night and flows it through the cold product to generate cold energy, and the open pipe cold storage system stores the cold energy in another open pipe; The closed-pipe cold storage system cuts the two ends of the two pipes into a first closed pipe section and a second closed pipe section, which are connected by a connecting pipe. The closed-pipe cold storage system draws water from the first closed pipe section at night and flows it through the cold product to generate cold energy. The closed-pipe cold storage system stores the cold energy in the second closed pipe section. The water in the first closed pipe section flows through the connecting pipe into the second closed pipe section for mixing. The water in the second closed pipe section flows through the connecting pipe into the first closed pipe section for mixing. The water storage facility cold storage system draws water from the water storage facility at night and flows it through the cold product for refrigeration to generate cold energy. The open pipe cold storage system stores the cold energy in the water storage facility.

5. The nighttime cold storage system according to claim 4, characterized in that: The open pipe cold storage system includes: a heating water supply pipe and a heating return water pipe arranged in the same cold storage area, and at least one refrigeration device for storing cold in the heating water supply pipe, wherein the refrigeration device is at least one of an industrial refrigeration device and a household refrigeration device; The refrigeration equipment is communicated with the heating water supply main via a first pipeline, and the refrigeration equipment is communicated with the heating water return main via a second pipeline.

6. The nighttime cold storage system according to claim 4, characterized in that: The closed pipe cold storage system includes: a portion of the heating water supply pipe as the first cold storage chamber, a connecting pipe as the second cold storage chamber, and a portion of the heating return pipe as the third cold storage chamber; the portion of the heating water supply pipe, the connecting pipe, and the portion of the heating return pipe are all located in the same cold storage area; The connecting pipe connects part of the heating water supply pipe and part of the heating water return pipe, so that the first cold storage chamber, the second cold storage chamber and the third cold storage chamber are connected in sequence; the first cold storage chamber, the second cold storage chamber and the third cold storage chamber together form a cold storage container; the cold storage container is connected to the cold storage system and the cold release system; A first shut-off valve is added to one end of the heating water supply pipe, and a second shut-off valve is added to the other end of the heating water supply pipe. The water supply pipe section between the first shut-off valve and the second shut-off valve is the first cold storage chamber, and the water supply pipe section between the first shut-off valve and the second shut-off valve is also the heating water supply pipe; A third shut-off valve is added to one end of the heating return pipe, and a fourth shut-off valve is added to the other end of the heating return pipe. The return pipe section between the third and fourth shut-off valves is the third cold storage chamber, and the return pipe section between the third and fourth shut-off valves is also the heating return pipe. One end of the connecting pipe is connected to the heating water supply pipe between the first shutoff valve and the second shutoff valve, and the other end of the connecting pipe is connected to the heating return pipe between the third shutoff valve and the fourth shutoff valve.

7. The nighttime cold storage system according to claim 4, characterized in that: The water storage facility cold storage system includes: a first fire water tank, a second fire water tank, a first plate heat exchanger, a second plate heat exchanger and a first heat pump; the first fire water tank exchanges heat with a first chiller through the first plate heat exchanger, and the first chiller is an existing chiller in the building; The first fire water pool and the second fire water pool are located in the basement of the same building, and at least one equipment room is separated from the first fire water pool and the second fire water pool; The first heat pump is arranged close to the first fire water pool or the second fire water pool; the first fire water pool and the second fire water pool exchange heat through the first heat pump; When the water temperature in the first fire water pool is lower than the water temperature in the second fire water pool, the first heat pump forces heat to flow from the first fire water pool to the second fire water pool.

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