CN111829246A - Low-temperature energy storage system and control method thereof - Google Patents
Low-temperature energy storage system and control method thereof Download PDFInfo
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- CN111829246A CN111829246A CN202010486215.4A CN202010486215A CN111829246A CN 111829246 A CN111829246 A CN 111829246A CN 202010486215 A CN202010486215 A CN 202010486215A CN 111829246 A CN111829246 A CN 111829246A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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Abstract
A low-temperature energy storage system and a control method thereof comprise the following steps: the cold energy recovery system comprises a cold energy utilization heat exchanger (1), a cold energy recovery heat exchanger (8), an outer heat-preservation tank and one or more cold accumulators arranged in the outer heat-preservation tank; the plurality of cold accumulators are connected through pipelines to form an energy storage circulation loop; the energy storage circulation loop is connected with the cold energy utilization heat exchanger (1) through a pipeline to form a cold energy utilization loop, so that the heat exchange between the cold energy stored in the energy storage circulation loop and the external connection is realized; the energy storage circulation loop is connected through a cold energy recovery heat exchanger (8) to form a cold energy recovery circulation loop, so that cold energy in the cold energy recovery heat exchanger (8) is absorbed and stored in the energy storage circulation loop; the cold accumulation structure in the scheme directly exchanges heat with the heat exchanger through the cold accumulator, so that the problems of cold energy waste and low conversion efficiency are reduced; the cold storage and release power can be flexibly adjusted according to the change requirement, and the high-efficiency cold storage and release process is realized.
Description
Technical Field
The invention relates to the technical field of novel energy storage, in particular to a low-temperature energy storage system and a control method thereof.
Background
The liquid air energy storage technology is a cryogenic energy storage technology which utilizes liquid air or nitrogen as an energy storage medium. In the load valley period of the power grid, an air liquefaction unit of the cryogenic energy storage system utilizes valley electric energy and cold energy stored in the last period energy release process to produce liquid air or liquid nitrogen, and the electric energy is stored in the liquid air or nitrogen in the form of low-temperature cold energy; during the peak period of the power grid load, the low-temperature cryogenic pump pressurizes the stored liquid air or nitrogen, and the heat energy stored in the afterburning process or the previous period energy storage process is used for heating the air or nitrogen to drive the expansion machine to do work and generate power.
The liquid air energy storage system as a large-scale energy storage system has the characteristics of high energy storage density, short response time, no geographic condition limitation and the like, and is widely concerned. At present, the liquid air energy storage system mainly adopts methods such as a solid heat exchange medium or a liquid heat exchange medium. The solid heat exchange medium directly exchanges heat with air or nitrogen, and the cold storage efficiency is low and the storage volume is large due to the large initial heat exchange temperature difference in the energy storage/release process, the heat transfer in the heat accumulator and the influence of the thermocline; the traditional solid medium cold storage unit usually adopts a double-layer storage tank, and under the influence of low effective cold storage amount, the number of the tank bodies is large, and the occupied area is large; the liquid heat exchange medium adopts plate-fin countercurrent heat exchange, so that the heat exchange temperature difference is small, the cold accumulation efficiency is high, the price of the liquid heat exchange medium is high, and the working medium is inflammable, so that the early cost is increased.
Disclosure of Invention
In order to solve the problems of large storage volume and low cold accumulation efficiency of an energy storage system in the prior art, the invention provides a low-temperature energy storage system, which comprises:
the cold energy recovery system comprises a cold energy utilization heat exchanger (1), a cold energy recovery heat exchanger (8), an outer heat-preservation tank and one or more cold accumulators arranged in the outer heat-preservation tank;
the plurality of cold accumulators are connected through pipelines to form an energy storage circulation loop;
the energy storage circulation loop is connected with the cold energy utilization heat exchanger (1) through a pipeline to form a cold energy utilization loop, so that the heat exchange between the cold energy stored in the energy storage circulation loop and the external connection is realized;
the energy storage circulation loop is connected through a cold energy recovery heat exchanger (8) to form a cold energy recovery circulation loop, so that cold energy in the cold energy recovery heat exchanger (8) is absorbed and stored in the energy storage circulation loop.
Preferably, the energy storage circulation loop further comprises a plurality of valves, and the valves are respectively installed on the pipelines connected with the two ends of each regenerator and the pipelines connected with each regenerator in parallel.
Preferably, when a plurality of solid-state cold accumulators are arranged, the plurality of solid-state cold accumulators are connected in series and/or in parallel through the valves at two ends of each cold accumulator and the valves on the pipelines connected with the cold accumulators in parallel.
Preferably, the cold accumulator is filled with a solid energy storage medium.
Preferably, the solid energy storage medium is a porous medium with a porosity in the range of 10% to 90%.
Preferably, the pipeline is filled with gaseous heat exchange working medium.
Preferably, the pressure range of the gaseous working medium is 0.1MPa (A) to 5MPa (A).
Preferably, the gaseous heat exchange working medium is a low-temperature single gaseous working medium or a multi-element mixed gaseous working medium.
Preferably, the system further comprises a circulating fan (2), wherein the circulating fan (2) is arranged at the input end of the energy storage circulation loop, the high-temperature end of the cold energy utilization heat exchanger (1) and the high-temperature end of the cold energy recovery heat exchanger (8) and used for driving the gaseous heat exchange working medium filled in the pipeline to flow.
Preferably, the cold energy utilization circuit further comprises a first valve (9) and a second valve (10); the first valve (9) is arranged between the output end of the energy storage circulation loop and the cold energy utilization heat exchanger (1);
the second valve (10) is arranged between the input end of the energy storage circulation loop and the cold energy recovery heat exchanger (8).
Based on the same inventive concept, the invention also provides a control method for the low-temperature energy storage system, which comprises the following steps:
when the energy storage circulation loop is subjected to cold storage, a cold energy recovery circulation loop formed by the energy storage circulation loop, a cold energy recovery heat exchanger (8) and a pipeline is conducted, heat exchange cooling is carried out in the cold energy recovery heat exchanger (8) through the pipeline, cold energy is stored in each cold accumulator in the energy storage circulation loop, and meanwhile, the temperature of an outer heat preservation tank in the energy storage circulation loop is utilized for temperature isolation from the outside;
when the energy storage circulation loop is cooled, the cold energy utilization loop formed by the energy storage circulation loop, the cold energy utilization heat exchanger (1) and the pipeline is conducted, heat exchange is carried out in the cold energy utilization heat exchanger (1) through the pipeline for cooling, and cold energy stored in each cold accumulator in the energy storage circulation loop is released.
Preferably, the cold energy recovery circulation loop formed by conducting the energy storage circulation loop, the cold energy recovery heat exchanger (8) and the pipeline performs heat exchange cooling in the cold energy recovery heat exchanger (8) through the pipeline, and the method includes:
the cold energy recycling circulation loop is conducted by closing a first valve (9) arranged between the output end of the energy storage circulation loop and the cold energy utilization heat exchanger (1) and simultaneously opening a second valve (10) arranged between the input end of the energy storage circulation loop and the cold energy recycling heat exchanger (8);
the high-temperature gaseous heat exchange working medium stored in the pipeline is driven by the circulating fan (2) to enter the cold energy recovery heat exchanger (8) and then the temperature is reduced;
the low-temperature gaseous heat exchange working medium enters each cold accumulator in the energy storage circulation loop under the drive of the circulating fan (2) to exchange heat, and then the temperature is increased; then the circulation is formed by the circulating fan (2).
Preferably, the cold energy utilization loop formed by the energy storage circulation loop, the cold energy utilization heat exchanger (1) and the pipeline is conducted, the cold energy utilization heat exchanger (1) performs heat exchange cooling through the pipeline, and the cold energy stored in each cold accumulator in the energy storage circulation loop is released, and the cold energy utilization loop comprises:
the cold energy utilization loop is conducted by opening a first valve (9) arranged between the output end of the energy storage circulation loop and the cold energy utilization heat exchanger (1) and closing a second valve (10) arranged between the input end of the energy storage circulation loop and the cold energy recovery heat exchanger (8);
high-temperature gaseous heat exchange working media in the pipeline enter each cold accumulator in the energy storage circulation loop under the driving of a circulating fan (2) to carry out heat exchange, and then the temperature is reduced;
the low-temperature gaseous heat exchange working medium enters the cold energy utilization heat exchanger again for heat exchange, then the temperature is raised, and then the circulation is formed through the circulating fan (2).
Preferably, the cold energy stored in each cold accumulator in the energy storage circulation circuit or the cold energy stored in each cold accumulator in the energy storage circulation circuit is released, and the cold energy release device includes:
the cold energy storage is sequentially or simultaneously carried out on the plurality of solid-state cold accumulators through the opening and closing of the valves at the two ends of each cold accumulator and the valves on the pipelines connected with the cold accumulators in parallel; or
The cold energy stored in the solid-state cold accumulators is released sequentially or simultaneously by the opening and closing of the valves at the two ends of each cold accumulator and the valves on the pipelines connected with the cold accumulators in parallel.
The invention has the beneficial effects that:
the invention provides a low-temperature energy storage system and a control method thereof, wherein the low-temperature energy storage system comprises the following steps: the cold energy recovery system comprises a cold energy utilization heat exchanger (1), a cold energy recovery heat exchanger (8), an outer heat-preservation tank and one or more cold accumulators arranged in the outer heat-preservation tank; the plurality of cold accumulators are connected through pipelines to form an energy storage circulation loop; the energy storage circulation loop is connected with the cold energy utilization heat exchanger (1) through a pipeline to form a cold energy utilization loop, so that the heat exchange between the cold energy stored in the energy storage circulation loop and the external connection is realized; the energy storage circulation loop is connected through a cold energy recovery heat exchanger (8) to form a cold energy recovery circulation loop, so that cold energy in the cold energy recovery heat exchanger (8) is absorbed and stored in the energy storage circulation loop; the cold accumulation structure in the scheme directly exchanges heat with the heat exchanger through the cold accumulator, so that the problems of cold energy waste and low conversion efficiency are reduced; the cold accumulation system in the scheme only comprises the cold accumulator and the heat exchanger, and is simple in structure and small in occupied area.
Drawings
FIG. 1 is a schematic structural diagram of a cryogenic energy storage system of the present invention;
fig. 2 is a schematic view of the internal structure of the regenerator of the present invention;
FIG. 3 is a flow chart of a low temperature energy storage control method;
wherein, 1-cold energy utilizes the heat exchanger; 2-a circulating fan; 3-insulating an outer tank; 4-a first regenerator; 5-a second regenerator; 6-a third sub-regenerator; 7-a fourth regenerator; 8-cold energy recovery heat exchanger; 9-a first valve; 10-a second valve; f1 first front valve; f2 second front valve; f3 third front valve; fn front valve; m1 first middle valve; m2 second middle valve; m3 third middle valve; the Mn (n) th middle valve; b1 first rear valve; b2 second rear valve; b3 third rear valve; bn the nth rear valve.
Detailed Description
For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
Example 1:
the embodiment provides a low temperature energy storage system, and schematic diagram is shown in fig. 1, and the system includes that cold energy utilizes heat exchanger 1, heat preservation outer tank 3, sets up a plurality of regenerators, cold energy recovery heat exchanger 8 and circulating fan 2 in heat preservation outer tank 3.
The system comprises a cold energy utilization circulation loop, a cold energy recovery circulation loop and a compact energy storage unit circulation loop; the connecting part of the cold energy utilization circulation loop and the compact energy storage unit circulation loop is a cold energy utilization heat exchanger 1; the adapting unit of cold energy recovery circulation circuit and compact energy storage unit circulation circuit is cold energy recovery heat exchanger 8, wherein:
the cold energy utilization circulation loop comprises a cold energy utilization heat exchanger 1; the left input end of the cold energy utilization heat exchanger 1 is a gas/liquid heat source inlet; the left output end of the cold energy utilization heat exchanger 2 is a gas/liquid heat source outlet;
the cold energy recovery circulation loop comprises a cold energy recovery heat exchanger 8; the right input end of the cold energy recovery heat exchanger 8 is an air/liquid cooling source inlet; the output end on the right side of the cold energy recovery heat exchanger 8 is an air/liquid cooling source outlet;
the compact energy storage unit circulation loop comprises: the cold energy recycling system comprises a cold energy utilization heat exchanger 1, a circulating fan 2, a heat preservation outer tank 3, a first cold accumulator 4, a second cold accumulator 5, a third cold accumulator 6, a fourth cold accumulator 7, a cold energy recovery heat exchanger 8, a first valve 9 and a second valve 10; gaseous working media for heat exchange in the cold storage process and the cold release process are contained in the compact energy storage unit circulation loop; the output end of the right side of the cold energy utilization heat exchanger 1 is connected with the inlet at the upper end of the circulating fan 2; the outlet at the lower end of the circulating fan 2 is respectively connected with the inlet at the upper end of the first cold accumulator 4, the second cold accumulator 5, the third cold accumulator 6 and the fourth cold accumulator 7; the lower end outlets of the first cold accumulator 4, the second cold accumulator 5, the third cold accumulator 6 and the fourth cold accumulator 7 are converged and then connected with the right side input end of a first valve 9 and the left side input end of a cold energy recovery heat exchanger 8; the left output end of the first valve 9 is connected with the right input end of the cold energy utilization heat exchanger 1; the left output end of the cold energy recovery heat exchanger 8 is connected with the right input end of a second valve 10; the left output end of the second valve 10 is connected with the inlet at the upper end of the circulating fan 2; solid energy storage media are filled in the first cold accumulator sub 4, the second cold accumulator sub 5, the third cold accumulator sub 6 and the fourth cold accumulator sub 7;
the first cold accumulator 4, the second cold accumulator 5, the third cold accumulator 6 and the fourth cold accumulator 7 are completely installed in the cold accumulator 3, and heat-insulating materials are filled in the internal gaps of the cold accumulator 3, so that the occupied area of the solid cold accumulator is reduced.
The number of the connected sub-regenerators is not limited to 4, and may be set to 1, 2, 3 or 4 or more according to the actual cold accumulation amount, cold accumulation time and other requirements.
The internal structure of the regenerator 3 of the regenerator is specifically shown in fig. 2, the connection mode of the sub-regenerators is not limited to parallel connection, and the third front valve can be opened/closed by a first front valve F1, a second front valve F2 and a third front valve F3 according to the actual operation requirement; fn front valve; m1 first middle valve; m2 second middle valve; m3 third middle valve; the Mn (n) th middle valve; b1 first rear valve; b2 second rear valve; b3 third rear valve; the nth rear valve of the Bn realizes series connection, parallel connection or series-parallel connection and other special connection modes, so that the cold storage power and the cold release power can be flexibly adjusted according to the change requirement, and the efficient cold storage and release process is realized.
The solid energy storage medium is a porous medium with the porosity of 10-90%.
The internal gaseous heat exchange working medium in the compact energy storage unit circulation loop can be a low-temperature single gaseous working medium or a multi-element mixed gaseous working medium.
The pressure range of the gaseous working medium is 0.1MPa (A) to 5MPa (A).
Example 2:
as shown in fig. 3, this embodiment provides a control method of the low temperature energy storage system provided in embodiment 1, before the system is operated, the valves at both ends of each regenerator and the valves on the pipes connected in parallel with each regenerator, as well as the first valve 9 and the second valve 10 are all in the closed state, and then,
s1, when cold is stored in the energy storage circulation loop, conducting a cold energy recovery circulation loop formed by the energy storage circulation loop, the cold energy recovery heat exchanger 8 and a pipeline, performing heat exchange and cooling in the cold energy recovery heat exchanger 8 through the pipeline, storing cold energy in each cold accumulator in the energy storage circulation loop, and meanwhile, performing temperature isolation with the outside by using a heat insulation outer tank in the energy storage circulation loop;
and S2, when the energy storage circulation loop is cooled, conducting a cold energy utilization loop formed by the energy storage circulation loop, the cold energy utilization heat exchanger 1 and the pipeline, carrying out heat exchange and cooling in the cold energy utilization heat exchanger 1 through the pipeline, and releasing the cold energy stored in each cold accumulator in the energy storage circulation loop.
S1, when the energy storage circulation loop is cold-stored, the concrete steps are as follows:
the cold energy recycling circulation loop is conducted by closing a first valve 9 arranged between the output end of the energy storage circulation loop and the cold energy utilization heat exchanger 1 and simultaneously opening a second valve 10 arranged between the input end of the energy storage circulation loop and the cold energy recycling heat exchanger 8;
the high-temperature gaseous heat exchange working medium stored in the pipeline is driven by the circulating fan 2 to enter the cold energy recovery heat exchanger 8, and then the temperature is reduced;
the low-temperature gaseous heat exchange working medium enters each cold accumulator in the energy storage circulation loop under the drive of the circulating fan 2 to exchange heat, and then the temperature is increased; then the circulation is formed by the circulating fan 2.
The cold energy storage is carried out on the plurality of solid-state cold accumulators sequentially or simultaneously by the opening and closing of the valves at the two ends of each cold accumulator and the valves on the pipelines connected with the cold accumulators in parallel.
S2 the concrete steps when releasing cold to the energy storage circulation loop include:
the cold energy utilization loop is conducted by opening a first valve 9 arranged between the output end of the energy storage circulation loop and the cold energy utilization heat exchanger 1 and closing a second valve 10 arranged between the input end of the energy storage circulation loop and the cold energy recovery heat exchanger 8;
the high-temperature gaseous heat exchange working medium in the pipeline enters each cold accumulator in the energy storage circulation loop under the driving of the circulating fan 2 to carry out heat exchange, and then the temperature is reduced;
the low-temperature gaseous heat exchange working medium enters the cold energy utilization heat exchanger again for heat exchange, then the temperature is raised, and then the circulation is formed through the circulating fan 2.
The cold energy stored in the solid-state cold accumulators is released sequentially or simultaneously by the opening and closing of the valves at the two ends of each cold accumulator and the valves on the pipelines connected with the cold accumulators in parallel.
The number of the cold accumulators which are simultaneously started is not limited to 1, and any number of solid cold accumulators can be simultaneously started according to the operation condition;
the cold energy utilization circulation loop and the cold energy recovery circulation loop can adopt but not limited to working media such as air, nitrogen and the like, and the circulating operation is met.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (14)
1. A cryogenic energy storage system, comprising:
the cold energy recovery system comprises a cold energy utilization heat exchanger (1), a cold energy recovery heat exchanger (8), an outer heat-preservation tank and one or more cold accumulators arranged in the outer heat-preservation tank;
the plurality of cold accumulators are connected through pipelines to form an energy storage circulation loop;
the energy storage circulation loop is connected with the cold energy utilization heat exchanger (1) through a pipeline to form a cold energy utilization loop, so that the heat exchange between the cold energy stored in the energy storage circulation loop and the external connection is realized;
the energy storage circulation loop is connected through a cold energy recovery heat exchanger (8) to form a cold energy recovery circulation loop, so that cold energy in the cold energy recovery heat exchanger (8) is absorbed and stored in the energy storage circulation loop.
2. The system of claim 1, wherein the energy storage cycle further comprises a plurality of valves respectively mounted on the pipes connected to both ends of each regenerator and on the pipes connected in parallel to each regenerator.
3. The system according to claim 2, wherein when the solid-state regenerator is plural, the series connection and/or parallel connection of the plural solid-state regenerators is realized by opening and closing valves at both ends of each regenerator and valves on pipes connected in parallel with each regenerator.
4. A system according to any one of claims 1 to 3, wherein the regenerator is filled with a solid energy storage medium.
5. The system of claim 4, wherein the solid state energy storage medium is a porous medium having a porosity in the range of 10% to 90%.
6. The system according to any one of claims 1 to 3, wherein the conduit is filled with a gaseous heat exchange medium.
7. The system of claim 6 wherein said gaseous working fluid has a pressure in the range of 0.1mpa (a) to 5mpa (a).
8. The system of claim 6, wherein the gaseous heat exchange working medium is a low-temperature single gaseous working medium or a multi-element mixed gaseous working medium.
9. The system according to claim 6, characterized in that the system further comprises a circulating fan (2), and the circulating fan (2) is arranged at the input end of the energy storage circulation loop and the high-temperature end of the cold energy utilization heat exchanger (1) and the high-temperature end of the cold energy recovery heat exchanger (8) and is used for driving the gaseous heat exchange working medium filled in the pipeline to flow.
10. The system according to claim 9, characterized in that said cold energy utilization circuit further comprises a first valve (9) and a second valve (10); the first valve (9) is arranged between the output end of the energy storage circulation loop and the cold energy utilization heat exchanger (1);
the second valve (10) is arranged between the input end of the energy storage circulation loop and the cold energy recovery heat exchanger (8).
11. A method of controlling a cryogenic energy storage system according to any of claims 1 to 10 comprising:
when the energy storage circulation loop is subjected to cold storage, a cold energy recovery circulation loop formed by the energy storage circulation loop, a cold energy recovery heat exchanger (8) and a pipeline is conducted, heat exchange cooling is carried out in the cold energy recovery heat exchanger (8) through the pipeline, cold energy is stored in each cold accumulator in the energy storage circulation loop, and meanwhile, the temperature of an outer heat preservation tank in the energy storage circulation loop is utilized for temperature isolation from the outside;
when the energy storage circulation loop is cooled, the cold energy utilization loop formed by the energy storage circulation loop, the cold energy utilization heat exchanger (1) and the pipeline is conducted, heat exchange is carried out in the cold energy utilization heat exchanger (1) through the pipeline for cooling, and cold energy stored in each cold accumulator in the energy storage circulation loop is released.
12. The control method according to claim 11, wherein the conducting of the cold energy recovery circulation loop formed by the energy storage circulation loop, the cold energy recovery heat exchanger (8) and the pipeline performs heat exchange cooling in the cold energy recovery heat exchanger (8) through the pipeline, and comprises:
the cold energy recycling circulation loop is conducted by closing a first valve (9) arranged between the output end of the energy storage circulation loop and the cold energy utilization heat exchanger (1) and simultaneously opening a second valve (10) arranged between the input end of the energy storage circulation loop and the cold energy recycling heat exchanger (8);
the high-temperature gaseous heat exchange working medium stored in the pipeline is driven by the circulating fan (2) to enter the cold energy recovery heat exchanger (8) and then the temperature is reduced;
the low-temperature gaseous heat exchange working medium enters each cold accumulator in the energy storage circulation loop under the drive of the circulating fan (2) to exchange heat, and then the temperature is increased; then the circulation is formed by the circulating fan (2).
13. The control method according to claim 11, wherein the conducting of the cold energy utilization circuit formed by the energy storage circulation circuit, the cold energy utilization heat exchanger (1) and the pipeline, the heat exchange cooling in the cold energy utilization heat exchanger (1) through the pipeline, and the releasing of the cold energy stored in each cold accumulator in the energy storage circulation circuit, comprises:
the cold energy utilization loop is conducted by opening a first valve (9) arranged between the output end of the energy storage circulation loop and the cold energy utilization heat exchanger (1) and closing a second valve (10) arranged between the input end of the energy storage circulation loop and the cold energy recovery heat exchanger (8);
high-temperature gaseous heat exchange working media in the pipeline enter each cold accumulator in the energy storage circulation loop under the driving of a circulating fan (2) to carry out heat exchange, and then the temperature is reduced;
the low-temperature gaseous heat exchange working medium enters the cold energy utilization heat exchanger again for heat exchange, then the temperature is raised, and then the circulation is formed through the circulating fan (2).
14. The control method according to claim 11, wherein the storing or releasing of the cold energy stored in each regenerator in the energy storage circulation circuit comprises:
the cold energy storage is sequentially or simultaneously carried out on the plurality of solid-state cold accumulators through the opening and closing of the valves at the two ends of each cold accumulator and the valves on the pipelines connected with the cold accumulators in parallel; or
The cold energy stored in the solid-state cold accumulators is released sequentially or simultaneously by the opening and closing of the valves at the two ends of each cold accumulator and the valves on the pipelines connected with the cold accumulators in parallel.
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| CN202010486215.4A CN111829246A (en) | 2020-06-01 | 2020-06-01 | Low-temperature energy storage system and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418330A (en) * | 2021-05-28 | 2021-09-21 | 中国科学院理化技术研究所 | Liquid air energy storage system, combined cold accumulator and control method thereof |
| CN116817526A (en) * | 2023-07-19 | 2023-09-29 | 北京五环顺通供应链管理有限公司 | Cold storage cold energy supply system based on latent heat cold storage and supply method thereof |
-
2020
- 2020-06-01 CN CN202010486215.4A patent/CN111829246A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418330A (en) * | 2021-05-28 | 2021-09-21 | 中国科学院理化技术研究所 | Liquid air energy storage system, combined cold accumulator and control method thereof |
| CN116817526A (en) * | 2023-07-19 | 2023-09-29 | 北京五环顺通供应链管理有限公司 | Cold storage cold energy supply system based on latent heat cold storage and supply method thereof |
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