CN216347142U - Compression coupling multistage generation absorption type thermochemical energy storage circulation system - Google Patents
Compression coupling multistage generation absorption type thermochemical energy storage circulation system Download PDFInfo
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- CN216347142U CN216347142U CN202122894738.5U CN202122894738U CN216347142U CN 216347142 U CN216347142 U CN 216347142U CN 202122894738 U CN202122894738 U CN 202122894738U CN 216347142 U CN216347142 U CN 216347142U
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- 238000007906 compression Methods 0.000 title claims abstract description 61
- 230000006835 compression Effects 0.000 title claims abstract description 60
- 238000004146 energy storage Methods 0.000 title claims abstract description 43
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 34
- 230000008878 coupling Effects 0.000 title abstract description 7
- 238000010168 coupling process Methods 0.000 title abstract description 7
- 238000005859 coupling reaction Methods 0.000 title abstract description 7
- 239000003507 refrigerant Substances 0.000 claims abstract description 31
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 10
- 239000006096 absorbing agent Substances 0.000 claims description 9
- 238000005057 refrigeration Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- OHMHBGPWCHTMQE-UHFFFAOYSA-N 2,2-dichloro-1,1,1-trifluoroethane Chemical compound FC(F)(F)C(Cl)Cl OHMHBGPWCHTMQE-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 101150026303 HEX1 gene Proteins 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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- Sorption Type Refrigeration Machines (AREA)
Abstract
The utility model provides a compression coupling multistage generation absorption type thermochemical energy storage circulation system, which relates to the technical field of absorption type energy storage, adopts a compressor for driving, is not limited by time and space, and can effectively improve the utilization efficiency of electric energy; the circulation system includes: a multistage generation cycle structure for implementing an absorption thermochemical energy storage cycle and a multistage compression device for driving; multistage compression equipment sets up with multistage generator one-to-one among the multistage emergence loop structure, and each grade compression equipment all sets up at the refrigerant input that corresponds the generator, specifically does: the input end of the primary compression equipment is connected with the refrigerant output end of the evaporative condenser, and the output end of the primary compression equipment is connected with the refrigerant input end of the primary generator; the input end of the secondary compression equipment is connected with the refrigerant output end of the primary generator, and the output end of the secondary compression equipment is connected with the refrigerant input end of the secondary generator.
Description
Technical Field
The utility model relates to the technical field of absorption type energy storage, in particular to a compression coupling multistage generation absorption type thermochemical energy storage circulation system.
Background
With the development of global economy, pollution is more serious, and the requirement of people on new energy is higher and higher. Solar energy has the characteristics of cleanness, environmental protection and the like, and cannot cause pollution or secondary pollution, so that solar power generation is more and more popular. A solar power generation apparatus is an apparatus that converts solar energy into electric energy. The solar energy storage device is generally electrically connected with the solar power generation device, and is used for storing electric energy generated by the solar power generation device and supplying power to a user according to power consumption requirements. The absorption type energy storage technology is particularly significant to the efficient utilization of energy.
The existing absorption type energy storage technology mainly comprises a single-effect/double-effect/multiple-effect absorption type energy storage technology driven by solar energy and a multiple-effect absorption type energy storage technology driven by solar energy assisted by a compressor. Because the spatial-temporal distribution of solar energy is extremely unbalanced, the existing absorption energy storage technology is greatly influenced by time and space, and the problem of unstable working condition exists.
Accordingly, there is a need to develop a compression-coupled multistage generation absorption thermochemical energy storage cycle system to address the deficiencies of the prior art and to solve or mitigate one or more of the problems set forth above.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a compression-coupled multistage-generation absorption thermochemical energy storage circulation system, which is driven by a two-stage compressor, is not limited by time and space, and can effectively improve the utilization efficiency of electric energy.
The utility model provides a compression coupling multistage generation absorption type thermochemical energy storage circulation system, which is characterized by comprising: the system comprises a multistage generation cycle structure for realizing absorption thermochemical energy storage cycle and multistage compression equipment for driving the multistage generation cycle structure to work;
the multistage compression equipment and the multistage generators in the multistage generation cycle structure are arranged in a one-to-one correspondence mode, and each stage of compression equipment is arranged at the refrigerant input end of the corresponding generator.
In accordance with the above-described aspects and any possible implementation manner, there is further provided an implementation manner, where the multi-stage generation cycle structure is a two-stage generation cycle structure, and the multi-stage compression device is a two-stage compression device; wherein,
the input end of the first-stage compression equipment is connected with the refrigerant output end of the evaporative condenser of the two-stage generation cycle structure, and the output end of the first-stage compression equipment is connected with the refrigerant input end of the first-stage generator; the input end of the secondary compression equipment is connected with the refrigerant output end of the primary generator, and the output end of the secondary compression equipment is connected with the refrigerant input end of the secondary generator.
The two-stage generation cycle structure can be an existing two-stage absorption thermochemical energy storage system, does not have a driving device, is driven by the two-stage compression device, can also be driven by solar energy, and is driven by the solar energy or the two-stage compression device according to the current solar energy collection condition during working.
The above aspect and any possible implementation further provide an implementation in which the line between the primary compression device and the evaporative condenser is a first refrigerant circulation line;
a first steam circulation pipeline is arranged between the secondary generator and the evaporative condenser;
the first refrigerant circulating pipeline and the first steam circulating pipeline are in heat exchange connection through a first heat exchanger.
The above aspect and any possible implementation further provide an implementation in which the line between the refrigerant output of the primary generator and the secondary compression device is a second refrigerant circulation line;
a second steam circulation pipeline is arranged between the first-stage generator and the evaporator of the two-stage generation circulation structure;
the second refrigerant circulating pipeline and the second steam circulating pipeline are in heat exchange connection through a third heat exchanger.
The above aspect and any possible implementation further provide an implementation in which a third compression device is disposed on the first vapor circulation line between the secondary generator and the first heat exchanger.
The above aspect and any possible implementation manner further provide an implementation manner, wherein a first chemical solution circulation pipeline is arranged between the first-stage generator and the absorber of the two-stage generation circulation structure; a second chemical solution circulating pipeline is arranged between the first-stage generator and the second-stage generator; the first chemical solution circulating pipeline and the second chemical solution circulating pipeline are in heat exchange connection through a second heat exchanger.
The above aspects and any possible implementations further provide an implementation in which the evaporator of the two-stage generation cycle is connected to a user refrigeration system.
The above aspects and any possible implementations further provide an implementation in which the absorber of the two-stage generation cycle architecture is connected to a consumer heating system.
The above aspect and any possible implementation further provides an implementation in which the chemical solution in the circulation system is a lithium bromide solution.
The above aspect and any possible implementation manner further provide an implementation manner, and the refrigerant in the circulation system is R123.
The circulating system is characterized in that: the valley electricity is utilized to drive each stage of compression equipment to work, and the first stage of compression equipment compresses superheated refrigerant to drive the refrigerant to serve as a heat source of a first stage of generator; the condensed refrigerant exchanges heat with the water vapor of the primary generator after throttling, the refrigerant after heat exchange is compressed by secondary compression equipment to be used as a driving heat source of the secondary generator, and a third compression equipment is additionally arranged at a water vapor outlet of the secondary generator for compression assistance.
Compared with the prior art, one of the technical schemes has the following advantages or beneficial effects: the utility model is not limited by time and space, can store the redundant electric energy at any time, for example, the cycle can store the off-peak electricity at night to provide refrigeration or heating for users during the peak period of electricity utilization;
another technical scheme in the above technical scheme has the following advantages or beneficial effects: the utility model has lower generating temperature, high energy storage density and high performance efficiency, and improves the utilization efficiency of electric energy; the combined supply of cold and heat can be realized under certain conditions;
another technical scheme in the above technical scheme has the following advantages or beneficial effects: the compression device and the generator are correspondingly arranged, so that enough driving energy can be provided, and the energy storage efficiency is improved.
Of course, it is not necessary for any one product in which the utility model is practiced to achieve all of the above-described technical effects simultaneously.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a structural diagram of an energy storage process of a dual compression-coupled two-stage generation absorption thermochemical energy storage cycle system according to an embodiment of the utility model;
fig. 2 is a structural diagram of an energy release process of a dual compression-coupled two-stage generation absorption thermochemical energy storage cycle system according to an embodiment of the utility model.
Detailed Description
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the utility model, 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.
Aiming at the defects of the prior art, the utility model provides a novel compression coupling multistage generation absorption type thermochemical energy storage circulating system, the circulating method utilizes electric energy to store and drive the compressor, is not influenced by time and space, can meet the national power consumption requirement of 'peak clipping and valley filling', and stores the valley electricity to be used in the daytime. Compared with the traditional absorption type energy storage circulation, the circulation has the advantages of low generation temperature, high energy storage density and high performance efficiency, and can realize practical application.
In order to realize the purpose, the utility model adopts the following technical scheme to operate the double-compression coupling two-stage generation absorption type thermochemical energy storage cycle:
in the energy storage process, refrigerant R123 steam in the evaporative condenser flows through the first-stage generator after passing through the heat exchanger and the first-stage compressor, and the condensed heat is used as a driving heat source of the first-stage generator and is used for concentrating the lithium bromide dilute solution pumped into the first-stage generator from the absorber and concentrating the lithium bromide dilute solution into an intermediate concentration solution by utilizing the condensation heat of the R123; the condensed R123 passes through a throttle valve, a heat exchanger and a secondary compressor and then flows through a secondary generator, the lithium bromide intermediate concentration solution pumped into the secondary generator from the primary generator condenses the R123 again, and the condensed solution is concentrated into a concentrated solution by using the condensation heat of the R123; superheated steam from the secondary generator passes through the compressor and the heat exchanger, is condensed and evaporated by the R123 after passing through the throttle valve, and is finally stored in the evaporator together with the steam from the primary generator.
In the energy release process, water in the evaporator is evaporated in the daytime, and the cold energy in the evaporation process is used for refrigeration; the concentrated solution in the secondary generator enters the absorber to be mixed with the water vapor from the evaporator into dilute solution, and the heat released in the mixing process is taken away by the cooling water.
The structure of the two processes of energy storage and energy release of the circulating system of the utility model and the schematic diagram of the circulating process are shown in figures 1 and 2. In the figure, G1 and G2 are two generators, G1 is a primary generator, G2 is a secondary generator, EC is an evaporative condenser, a is an absorber, and E is an evaporator; HEX-1, HEX-2 and HEX-3 are three heat exchangers, wherein HEX-1 and HEX-3 function to superheat refrigerant R123 by 5 ℃, and C1, C2 and C3 are three compressors. The circulation process of the circulation system comprises an energy storage process and an energy release process.
During energy storage, the vapor of the refrigerant R123 in the evaporative condenser EC is superheated by 5 ℃ in the heat exchanger HEX-1, then compressed and heated by C1 and flows through the generator G1 (3 → 3H → 5' → 5), and the superheated R123 concentrates the LiBr/H2O dilute solution pumped into the generator G1 (1 → 1H → 5H → 4). The evaporated water vapor during concentration passes through a heat exchanger HEX-3(4 '→ 4H) to superheat the condensed R123 by 5 ℃ (2 → 2'), the R123 is compressed by C2, heated and then flows through a generator G2 (2 '→ 2H' → 2H), and the superheated R123 pumps the LiBr/H pumped into the generator G22The O intermediate concentration solution is further concentrated (4 → 7 → 6H → 6), and the water vapor released during the concentration passes through C3 and then flows through heat exchanger HEX-1 (6' → 6H), and then evaporates R123 which is condensed and flows into evaporative condenser EC (2H → 3), and then flows into evaporator E (6H → 8) to be stored.
When the energy is released, the water in the evaporator E evaporates (9 → 9'), and the generated cold is used for refrigerating the user. The strong LiBr/H2O solution in the generator G2 enters the absorber A to be mixed with the water vapor from the evaporator E into a dilute solution (6 → 6H → 1) and is stored in the absorber A to enter the next circulation, and the released heat is taken away by the cooling water.
In the above flow, the cycle can not only realize refrigeration, but also realize heating, and can realize combined supply of cold and heat under specific conditions. Meanwhile, the power consumption can be reduced by increasing the number of the compressors and the generators, and the specific process is as follows: refrigerant R123 condensed and flowed out from the previous-stage generator passes through a throttle valve and then exchanges heat with superheated water vapor of the previous-stage generator, and the refrigerant R123 after heat exchange is compressed by a next-stage compressor to provide heat for concentration of solution flowing into the next-stage generator from the previous-stage generator.
The compression-coupled multistage-generation absorption thermochemical energy storage cycle system provided in the embodiments of the present application is described in detail above. The above description of the embodiments is only for the purpose of helping to understand the method of the present application and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
Claims (10)
1. A compression-coupled multistage-generation absorption thermochemical energy storage cycle system, the cycle system comprising: the system comprises a multistage generation cycle structure for realizing absorption thermochemical energy storage cycle and multistage compression equipment for driving the multistage generation cycle structure to work;
the multistage compression equipment and the multistage generators in the multistage generation cycle structure are arranged in a one-to-one correspondence mode, and each stage of compression equipment is arranged at the refrigerant input end of the corresponding generator.
2. The compression-coupled multi-stage generation absorption thermochemical energy storage cycle system of claim 1 wherein the multi-stage generation cycle architecture is a two-stage generation cycle architecture and the multi-stage compression device is a two-stage compression device; wherein,
the input end of the first-stage compression equipment is connected with the refrigerant output end of the evaporative condenser of the two-stage generation cycle structure, and the output end of the first-stage compression equipment is connected with the refrigerant input end of the first-stage generator; the input end of the secondary compression equipment is connected with the refrigerant output end of the primary generator, and the output end of the secondary compression equipment is connected with the refrigerant input end of the secondary generator.
3. The compression-coupled multi-stage generation absorption thermochemical energy storage cycle system of claim 2 wherein the line between the primary compression device and the evaporative condenser is a first refrigerant cycle line;
a first steam circulation pipeline is arranged between the secondary generator and the evaporative condenser;
the first refrigerant circulating pipeline and the first steam circulating pipeline are in heat exchange connection through a first heat exchanger.
4. The compression-coupled multi-stage generation absorption thermochemical energy storage cycle system of claim 2 wherein the line between the refrigerant output of the primary generator and the secondary compression device is a second refrigerant circulation line;
a second steam circulation pipeline is arranged between the first-stage generator and the evaporator of the two-stage generation circulation structure;
the second refrigerant circulating pipeline and the second steam circulating pipeline are in heat exchange connection through a third heat exchanger.
5. The compression-coupled multi-stage generation absorption thermochemical energy storage cycle system of claim 3 wherein a third compression device is located on the first vapor circulation line between the secondary generator and the first heat exchanger.
6. The compression-coupled multi-stage generation absorption thermochemical energy storage cycle system of claim 2 wherein a first chemical solution circulation line is provided between the first stage generator and the absorber of the two stage generation cycle structure; a second chemical solution circulating pipeline is arranged between the first-stage generator and the second-stage generator; the first chemical solution circulating pipeline and the second chemical solution circulating pipeline are in heat exchange connection through a second heat exchanger.
7. The compression-coupled multi-stage generation absorption thermochemical energy storage cycle system of claim 2 wherein the evaporator of the two-stage generation cycle is connected to a user refrigeration system.
8. The compression-coupled multi-stage generation absorption thermochemical energy storage cycle system of claim 2 wherein the absorber of the two-stage generation cycle is connected to a user heating system.
9. The compression-coupled multi-stage generation absorption thermochemical energy storage cycle system of claim 6 wherein the chemical solution in the cycle system is a lithium bromide solution.
10. The compression-coupled multi-stage generation absorption thermochemical energy storage cycle system of claim 1 wherein the refrigerant in the cycle system is R123.
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| CN114001472A (en) * | 2021-11-19 | 2022-02-01 | 北京科技大学 | Compression coupling multistage generation absorption type thermochemical energy storage circulation system |
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| CN114001472A (en) * | 2021-11-19 | 2022-02-01 | 北京科技大学 | Compression coupling multistage generation absorption type thermochemical energy storage circulation system |
| CN114001472B (en) * | 2021-11-19 | 2024-07-05 | 北京科技大学 | Compression coupling multistage generation absorption type thermochemical energy storage circulating system |
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