CN116576398A - Carbon dioxide trapping energy storage peak regulation system based on cold energy utilization of liquefied natural gas - Google Patents
Carbon dioxide trapping energy storage peak regulation system based on cold energy utilization of liquefied natural gas Download PDFInfo
- Publication number
- CN116576398A CN116576398A CN202310417007.2A CN202310417007A CN116576398A CN 116576398 A CN116576398 A CN 116576398A CN 202310417007 A CN202310417007 A CN 202310417007A CN 116576398 A CN116576398 A CN 116576398A
- Authority
- CN
- China
- Prior art keywords
- carbon dioxide
- energy storage
- heat exchange
- exchange channel
- natural gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 520
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 260
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 260
- 238000004146 energy storage Methods 0.000 title claims abstract description 96
- 239000003949 liquefied natural gas Substances 0.000 title claims abstract description 66
- 239000007788 liquid Substances 0.000 claims abstract description 140
- 230000006835 compression Effects 0.000 claims description 30
- 238000007906 compression Methods 0.000 claims description 30
- 230000008929 regeneration Effects 0.000 claims description 17
- 238000011069 regeneration method Methods 0.000 claims description 17
- 238000010521 absorption reaction Methods 0.000 claims description 16
- 238000005338 heat storage Methods 0.000 claims description 13
- 238000001704 evaporation Methods 0.000 claims description 10
- 230000008020 evaporation Effects 0.000 claims description 10
- 238000009833 condensation Methods 0.000 claims description 7
- 230000005494 condensation Effects 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 22
- 238000010248 power generation Methods 0.000 description 15
- 239000003345 natural gas Substances 0.000 description 11
- 230000005611 electricity Effects 0.000 description 8
- 238000009825 accumulation Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005381 potential energy Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C3/00—Vessels not under pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
Abstract
The invention relates to the technical field of energy storage, and provides a carbon dioxide trapping energy storage peak shaving system based on cold energy utilization of liquefied natural gas. The system of the invention comprises: a liquid carbon dioxide energy storage and release device; a carbon dioxide capturing device; the first heat exchanger is provided with a first heat exchange channel and a second heat exchange channel, an outlet of the carbon dioxide capturing device is communicated with an inlet of the liquid carbon dioxide energy storage and release device through the first heat exchange channel, and the first heat exchanger is used for liquefying carbon dioxide flowing out of the outlet of the carbon dioxide capturing device; the first generator is connected with the liquid carbon dioxide energy storage and release device; the liquefied natural gas storage tank is provided with a liquefied natural gas outlet which is communicated with the second heat exchange channel and used for providing cold energy for the first heat exchanger. The method is used for solving the technical problems that in the prior art, carbon dioxide mainly stores energy in a gaseous state or supercritical state, the energy storage density is low, and the cold energy utilization rate of liquefied natural gas is low.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to a carbon dioxide trapping energy storage peak shaving system based on cold energy utilization of liquefied natural gas.
Background
Currently, energy shortage and environmental pollution are increasingly serious, and the intensive development of renewable energy sources has become an important means for solving the problems of energy shortage and environmental pollution. In recent years, wind power generation, photovoltaic power generation and the like are rapidly developed, the application of traditional fossil energy sources is reduced to a certain extent, but renewable energy power generation has obvious fluctuation, periodicity, uncertainty and other adverse factors, and large-scale grid connection of the renewable energy power generation has certain challenges. In this context, the development of large-scale efficient energy storage systems has become an important consensus in the academia and society. The current main energy storage technologies include pumped storage, compressed air energy storage, battery energy storage and the like, wherein the pumped storage depends on geographical environment and is difficult to popularize and apply on a large scale; the compressed air energy storage has the disadvantages of low energy storage density, high compression heat loss and the like; the battery has short energy storage life, may cause adverse effects on the environment, and has potential safety hazards. Therefore, the method has great significance in actively developing a novel energy storage technology or upgrading and reforming the existing energy storage system.
Along with the enhancement of environmental awareness, carbon dioxide is active in mass vision again, and a transcritical carbon dioxide refrigerating system taking carbon dioxide as a refrigerating working medium has more application at present, and simultaneously, a scholars propose a carbon dioxide energy storage system, and related researches indicate that the system taking carbon dioxide as the energy storage working medium has the advantages of large energy storage density, small occupied area, lower cost and the like, but in the prior art, the carbon dioxide mainly stores energy in a gaseous state or a supercritical state, so that the technical problem of low energy storage density exists, and the energy storage efficiency is influenced.
Meanwhile, natural gas is used as clean energy and the specific gravity in energy consumption steadily rises, and particularly, with the improvement of natural gas liquefaction technology and the reduction of liquefied natural gas transportation cost, the natural gas has been widely applied and paid attention in recent years, but the high-grade cold energy of the liquefied natural gas in the prior art is difficult to fully utilize, and the problems of serious energy waste, pollution and the like exist.
In view of the foregoing, there is a need for a carbon dioxide capture energy storage peak shaving system based on cold energy utilization of liquefied natural gas.
Disclosure of Invention
The invention provides a carbon dioxide trapping energy storage peak regulation system based on cold energy utilization of liquefied natural gas, which is used for solving the technical problems that in the prior art, carbon dioxide mainly stores energy in a gaseous state or supercritical state, the energy storage density is low, and the cold energy utilization rate of the liquefied natural gas is low.
The invention provides a carbon dioxide trapping energy storage peak shaving system based on cold energy utilization of liquefied natural gas, which comprises the following components: a liquid carbon dioxide energy storage and release device; a carbon dioxide capturing device; the first heat exchanger is provided with a first heat exchange channel and a second heat exchange channel, an outlet of the carbon dioxide capturing device is communicated with an inlet of the liquid carbon dioxide energy storage and release device through the first heat exchange channel, and the first heat exchanger is used for liquefying carbon dioxide flowing out of the outlet of the carbon dioxide capturing device; the first generator is connected with the liquid carbon dioxide energy storage and release device; the liquefied natural gas storage tank is provided with a liquefied natural gas outlet which is communicated with the second heat exchange channel and used for providing cold energy for the first heat exchanger.
In an embodiment of the invention, the liquid carbon dioxide energy storage and release device comprises a first liquid carbon dioxide storage tank, at least one compressor, a second liquid carbon dioxide storage tank and a first expander which are sequentially communicated, wherein an outlet of the first expander is communicated with a backflow port of the first liquid carbon dioxide storage tank to form a first circulation loop for carbon dioxide to flow, the liquid carbon dioxide energy storage and release device further comprises a first throttle valve, at least one cooler and a second throttle valve, the first throttle valve is arranged between the first liquid carbon dioxide storage tank and the compressor, the at least one cooler is arranged between the compressor and the second liquid carbon dioxide storage tank, the second throttle valve is arranged between an outlet of the second liquid carbon dioxide storage tank and an inlet of the first expander, and the first generator is connected with an output shaft of the first expander.
In the embodiment of the invention, the liquid carbon dioxide energy storage and release device further comprises a second heat exchanger, wherein the second heat exchanger is provided with a third heat exchange channel and a fourth heat exchange channel, the first expander is communicated with the first liquid carbon dioxide storage tank through the third heat exchange channel in sequence, and the liquefied natural gas outlet is also communicated with the fourth heat exchange channel.
In an embodiment of the invention, the liquid carbon dioxide energy storage and release device further comprises a second expander and a second generator; the outlet of the second heat exchange channel is communicated with the outlet of the fourth heat exchange channel, and the output shaft of the second expander is connected with a second generator so as to drive the second generator to generate electric energy.
In an embodiment of the invention, the liquid carbon dioxide energy storage and release device further comprises at least one carbon dioxide heater arranged between the second liquid carbon dioxide storage tank and the first expander.
In an embodiment of the invention, the liquid carbon dioxide energy storage and release device further comprises a heat storage tank and a cold storage tank, the cooler is provided with a fifth heat exchange channel and a sixth heat exchange channel, and the carbon dioxide heater is provided with a seventh heat exchange channel and an eighth heat exchange channel; the compressor is communicated with the second liquid carbon dioxide storage tank through a fifth heat exchange channel; the sixth heat exchange channel, the heat storage tank, the seventh heat exchange channel and the cold storage tank are sequentially communicated to form a second circulation loop for the heat conducting medium to flow; the second liquid carbon dioxide storage tank is communicated with the first expander through an eighth heat exchange channel.
In an embodiment of the invention, the liquid carbon dioxide energy storage and release device further comprises at least one third expander, which is arranged between the at least one carbon dioxide heater and the first expander.
In an embodiment of the present invention, the compressor, the cooler, the third expander and the carbon dioxide heater are plural; a cooler is arranged between every two adjacent compressors; a third expander is arranged between every two adjacent carbon dioxide heaters.
In an embodiment of the invention, the liquid carbon dioxide energy storage and release device further comprises a cold accumulation heat exchanger, wherein the cold accumulation heat exchanger comprises an evaporation piece and a condensation piece which are connected, the first liquid carbon dioxide storage tank, the first throttle valve, the evaporation piece and the compressor are sequentially communicated, the evaporation piece is used for enabling carbon dioxide to absorb heat and evaporate, and the condensation piece is arranged between the first expansion machine and the first heat exchanger and is used for enabling carbon dioxide to emit heat and liquefy.
In an embodiment of the present invention, a carbon dioxide capture device includes: an air compression structure; the air outlet of the air compression structure is communicated with the gas inlet of the absorption tower; the lean solution rich solution heat exchanger is provided with a lean solution chamber and a rich solution chamber, and a rich solution outlet of the absorption tower is communicated with an inlet of the rich solution chamber; the outlet of the rich liquid chamber is communicated with the rich liquid inlet of the regeneration tower, and the lean liquid outlet of the regeneration tower is communicated with the inlet of the lean liquid chamber; the inlet of the carbon dioxide compression structure is communicated with the carbon dioxide outlet of the regeneration tower, and the outlet of the carbon dioxide compression structure is communicated with the inlet of the liquid carbon dioxide energy storage and release device through a first heat exchange channel.
According to the carbon dioxide capturing, energy storage and peak regulation system based on cold energy utilization of liquefied natural gas, the liquefied natural gas storage tank is used for providing cold energy for the first heat exchanger, when the liquefied natural gas flows through the second heat exchange channel, carbon dioxide in the first heat exchange channel can be liquefied, therefore, carbon dioxide captured by the carbon dioxide capturing device can be supplied to the liquid carbon dioxide energy storage and energy release device in a liquid state.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a carbon dioxide capture energy storage peak shaving system based on cold energy utilization of liquefied natural gas of the present invention.
Reference numerals:
1. a liquid carbon dioxide energy storage and release device; 101. a first liquid carbon dioxide storage tank; 102. a compressor; 103. a second liquid carbon dioxide storage tank; 104. a first expander; 105. a first throttle valve; 106. a cooler; 107. a second throttle valve; 108. a second heat exchanger; 109. a second expander; 110. a second generator; 111. a carbon dioxide heater; 112. a heat storage tank; 113. a cold accumulation tank; 114. a third expander; 115. a cold-storage heat exchanger; 2. a carbon dioxide capturing device; 21. an air compression structure; 22. an absorption tower; 23. a lean solution rich solution heat exchanger; 24. a regeneration tower; 25. a carbon dioxide compression structure; 3. a first heat exchanger; 4. a first generator; 5. a liquefied natural gas storage tank.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present embodiment.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present embodiment, the meaning of "plurality" is at least two, for example, two, three, etc., unless explicitly defined otherwise.
In this embodiment, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present embodiment can be understood by those of ordinary skill in the art according to the specific circumstances.
Fig. 1 shows a carbon dioxide capturing, energy storing and peak shaving system based on cold energy utilization of liquefied natural gas, which is provided by the invention, and as can be seen from the figure, the carbon dioxide capturing, energy storing and peak shaving system based on cold energy utilization of liquefied natural gas comprises a liquid carbon dioxide energy storing and releasing device 1, a carbon dioxide capturing device 2, a first heat exchanger 3, a first generator 4 and a liquefied natural gas storage tank 5, wherein the first heat exchanger 3 is provided with a first heat exchange channel and a second heat exchange channel, an outlet of the carbon dioxide capturing device 2 is communicated with an inlet of the liquid carbon dioxide energy storing and releasing device 1 through the first heat exchange channel, and the first heat exchanger 3 is used for liquefying carbon dioxide flowing out from an outlet of the carbon dioxide capturing device 2; the first generator 4 is connected with the liquid carbon dioxide energy storage and release device 1; the lng storage tank 5 has an lng outlet which communicates with the second heat exchange channel for providing cold to the first heat exchanger 3, i.e. lng can be used as a cooling medium for the first heat exchanger 3.
According to the carbon dioxide trapping, energy storing and peak regulating system based on cold energy utilization of liquefied natural gas, the liquefied natural gas storage tank 5 is used for providing cold energy for the first heat exchanger 3, when the liquefied natural gas flows through the second heat exchange channel, carbon dioxide in the first heat exchange channel can be liquefied, therefore, carbon dioxide trapped by the carbon dioxide trapping device 2 can be supplied to the liquid carbon dioxide energy storing and releasing device 1 in a liquid state, compared with the prior art, the carbon dioxide in the liquid state is stored in the liquid carbon dioxide energy storing and releasing device 1, the energy storing density and safety can be greatly improved, the energy storing efficiency is improved, the occupied area is reduced, the technical problems that the carbon dioxide is mainly stored in a gaseous state or a supercritical state, the energy storing density is low and the cold energy utilization rate of the liquefied natural gas is low in the prior art are solved, and the cold energy of the liquefied natural gas is used through cooperation with the first generator 4, and the carbon dioxide is trapped and the energy storing and peak regulating is carried out.
In an embodiment of the present invention, the liquid carbon dioxide energy storage and release device 1 may include a first liquid carbon dioxide storage tank 101 (or a low-pressure liquid carbon dioxide storage tank), at least one compressor 102, a second liquid carbon dioxide storage tank 103 (or a high-pressure liquid carbon dioxide storage tank), and a first expander 104, which are sequentially connected, wherein an outlet of the first expander 104 is connected to a return port of the first liquid carbon dioxide storage tank 101 to form a first circulation loop through which carbon dioxide flows, the liquid carbon dioxide energy storage and release device 1 may further include a first throttle valve 105, at least one cooler 106, and a second throttle valve 107, the first throttle valve 105 is disposed between the first liquid carbon dioxide storage tank 101 and the compressor 102 for controlling release of carbon dioxide in the low-pressure liquid carbon dioxide storage tank, the at least one cooler 106 is disposed between the compressor 102 and the second liquid carbon dioxide storage tank 103, the second throttle valve 107 is disposed between an outlet of the second liquid carbon dioxide storage tank 103 and an inlet of the first expander 104 for controlling release of carbon dioxide in the high-pressure liquid carbon dioxide storage tank, and the first generator 4 is connected to an output shaft of the first expander 104.
In specific implementation, the compressor 102 can compress the liquid carbon dioxide into a supercritical state, the carbon dioxide in the first liquid carbon dioxide storage tank 101 can absorb compression heat in the flowing process of the carbon dioxide to the second liquid carbon dioxide storage tank 103 after being pressurized by the compressor 102, liquefied carbon dioxide is convenient for the second liquid carbon dioxide storage tank 103 to store, and the carbon dioxide in the second liquid carbon dioxide storage tank 103 flows to the first expander 104, so that the first expander 104 drives the first generator 4 to rotate, and the first generator 4 is driven to generate electric energy, and peak shaving is performed through the first generator 4.
The system utilizes low-electricity-consumption or electricity-discarding to drive the compressor 102 to realize energy storage, converts electric energy into heat energy and potential energy, and carbon dioxide enters the first expander 104 to expand and push the first generator 4 to generate electricity in the electricity consumption peak period, so that the heat energy and the potential energy are converted into electric energy. The power grid can be effectively balanced, and the running stability of the power grid is improved. The invention has the advantages of compact equipment, high energy storage density, high energy storage efficiency, long service life, safe use and the like.
In some embodiments, the outside of the first and second liquid carbon dioxide storage tanks 101, 103 may be provided with insulation to ensure constant temperature within the storage tanks, preventing carbon dioxide vaporization. The first liquid carbon dioxide storage tank 101 and the second liquid carbon dioxide storage tank 103 may be low-pressure vessels made of cast iron or steel.
In the embodiment of the present invention, the carbon dioxide capturing device 2 may include an air compression structure 21, an absorption tower 22, a lean liquid-rich liquid heat exchanger 23, a regeneration tower 24, and a carbon dioxide compression structure 25, an air outlet of the air compression structure 21 being communicated with a gas inlet of the absorption tower 22; the lean-rich-liquid heat exchanger 23 has a lean-liquid chamber and a rich-liquid chamber, and a rich-liquid outlet of the absorption tower 22 communicates with an inlet of the rich-liquid chamber; the outlet of the rich liquid chamber is communicated with the rich liquid inlet of the regeneration tower 24, and the lean liquid outlet of the regeneration tower 24 is communicated with the inlet of the lean liquid chamber; the inlet of the carbon dioxide compression structure 25 is communicated with the carbon dioxide outlet of the regeneration tower 24, and the outlet of the carbon dioxide compression structure 25 is communicated with the inlet of the liquid carbon dioxide energy storage and release device 1 (the inlet of the first liquid carbon dioxide storage tank 101) through the first heat exchange channel of the first heat exchanger 3.
In practice, the air compression structure 21 can compress air, the absorption tower 22 can absorb carbon dioxide in the air, the lean solution and rich solution heat exchanger 23 can exchange heat between lean solution and rich solution, the regeneration tower 24 can analyze carbon dioxide in the rich solution, the carbon dioxide compression structure 25 can compress the captured carbon dioxide,
according to one embodiment of the present invention, the liquid carbon dioxide energy storage and release device 1 of the present invention may further include a second heat exchanger 108 having a third heat exchange channel and a fourth heat exchange channel, where the first expander 104 is sequentially connected to the inlet of the first liquid carbon dioxide storage tank 101 through the third heat exchange channel, and the liquefied natural gas outlet is further connected to the fourth heat exchange channel.
In a specific implementation, the lng storage tank 5 is used to provide cold energy to the second heat exchanger 108, and when the lng flows through the fourth heat exchange channel, the liquefied carbon dioxide in the third heat exchange channel can be liquefied, and the carbon dioxide is deeply cooled, so that the liquefied carbon dioxide is stored in the first liquid carbon dioxide storage tank 101.
According to one embodiment of the present invention, the liquid carbon dioxide energy storage and release device 1 of the present invention may further comprise a second expander 109 and a second generator 110; the outlet of the second heat exchange channel is communicated with the outlet of the fourth heat exchange channel, the inlet of the second expander 109 is connected with the output shaft of the second expander 109 through the second generator 110, so as to drive the second generator 110 to generate electric energy.
In specific implementation, the second expander 109 can release the cold energy of the natural gas and make the second expander 109 drive the second generator 110 to rotate, so as to drive the second generator 110 to generate electric energy, and the natural gas after being reheated is expanded to generate electricity.
In some embodiments, the first generator 4 and the second generator 110 can generate electricity during peak periods of electricity consumption and be incorporated into the power grid.
It will be appreciated that the natural gas exiting the outlet of the first expander 104 may be used directly by the user, and the present invention uses the cold energy of the lng.
It can be further understood that in the research and development process, the huge cold energy carried by the liquefied natural gas is expected to be applied to the liquefaction of natural medium carbon dioxide, meanwhile, the liquefied natural gas after the re-warming is changed into natural gas, and the natural gas carrying a certain pressure can be directly expanded for power generation, so that the overall power generation efficiency of the system is further improved. Therefore, the invention provides a carbon dioxide trapping energy storage peak shaving system based on cold energy utilization of liquefied natural gas. Carbon dioxide is captured from air as an energy storage working medium, the energy storage side is stored in a low-pressure liquid state, the energy release side is stored in a high-pressure liquid state, the energy storage density is improved to the maximum extent, the occupied area is reduced, and the system cost is reduced. And the recovery of compression heat and the heating in the expansion process are realized by combining a high-efficiency cold and heat storage circulating pipeline (a second circulating loop). Meanwhile, a liquefied natural gas cold energy utilization unit (liquefied natural gas storage tank 5) is arranged, the cold energy of the liquefied natural gas is utilized to fully liquefy the carbon dioxide working medium, and the natural gas after the re-warming is expanded to generate power.
According to an embodiment of the present invention, the liquid carbon dioxide energy storage and release device 1 of the present invention may further comprise at least one carbon dioxide heater 111 arranged between the second liquid carbon dioxide storage tank 103 and the first expander 104.
In particular, the carbon dioxide heater 111 can heat carbon dioxide to improve the power generation efficiency.
In an embodiment of the present invention, the cooler 106 and the carbon dioxide heater 111 may be in the form of a shell-and-tube heat exchanger, a plate heat exchanger, a fin heat exchanger, or the like.
According to an embodiment of the present invention, the liquid carbon dioxide energy storage and release device 1 of the present invention may further include a heat storage tank 112 and a cold storage tank 113, the cooler 106 having a fifth heat exchange channel and a sixth heat exchange channel, the carbon dioxide heater 111 having a seventh heat exchange channel and an eighth heat exchange channel; the compressor 102 is communicated with a second liquid carbon dioxide storage tank 103 through a fifth heat exchange channel; the sixth heat exchange channel, the heat storage tank 112, the seventh heat exchange channel and the cold storage tank 113 are sequentially communicated to form a second circulation loop for the heat transfer medium to flow; the second liquid carbon dioxide storage tank 103 is communicated with the first expander 104 through an eighth heat exchange channel.
In the specific implementation, in the energy storage link, the heat conducting medium is stored in the heat storage tank 112 after entering the coolers 106 at each level to absorb compression heat, so that the carbon dioxide heater 111 can heat carbon dioxide in the power generation link (energy release link), and the temperature of the heat storage tank 112 is preferably kept between 135 ℃ and 150 ℃; the heat-conducting medium heats carbon dioxide in the carbon dioxide heater 111 and flows into the cold accumulation tank 113 for storage, the cold accumulation tank 113 is used for energy storage in an energy release link, and the temperature of the cold accumulation tank 113 is preferably kept between 5 ℃ and 5 ℃ below zero.
In an embodiment of the present invention, the heat transfer medium may be water or heat transfer oil.
In some embodiments, the outer surfaces of the thermal storage tank 112 and the cold storage tank 113 may be provided with a thermal insulation layer, which may be made of a thermal insulation material, to enhance the thermal storage effect of the thermal storage tank 112 and the cold storage effect of the cold storage tank 113.
According to an embodiment of the present invention, the liquid carbon dioxide energy storage and release device 1 of the present invention may further comprise at least one third expander 114 arranged between the at least one carbon dioxide heater 111 and the first expander 104.
In particular embodiments, the third expander 114 is configured to expand supercritical carbon dioxide to increase the work capacity of the first expander 104.
In the embodiment of the present invention, the compressor 102, the cooler 106, the third expander 114, and the carbon dioxide heater 111 are plural; a cooler 106 is arranged between every two adjacent compressors 102; a third expander 114 is provided between two adjacent carbon dioxide heaters 111.
In practice, carbon dioxide may undergo multi-stage compression, multi-stage cooling, multi-stage heating, and multi-stage expansion.
In some embodiments, the compressor 102 and the third expander 114 are not limited to three stages, but may be provided in more stages, and accordingly, the cooler 106 and the carbon dioxide heater 111 may be provided in corresponding stages.
According to an embodiment of the present invention, the liquid carbon dioxide energy storage and release device 1 of the present invention may further include a cold storage heat exchanger 115, where the cold storage heat exchanger 115 includes an evaporation member and a condensation member connected to each other, the first liquid carbon dioxide storage tank 101, the first throttle valve 105, the evaporation member and the compressor 102 are sequentially connected, the evaporation member is used for absorbing heat and vaporizing carbon dioxide, and the condensation member is disposed between the first expander 104 and the first heat exchanger 3, and is used for liquefying carbon dioxide by releasing heat.
In specific implementation, the working media in the two carbon dioxide pipelines respectively perform phase change heat exchange with the heat exchange medium of the second heat exchanger 108, the liquid carbon dioxide flowing out of the outlet of the first liquid carbon dioxide storage tank 101 is heated and vaporized in the cold storage heat exchanger 115 (evaporation piece) by the heat exchange medium of the cold storage heat exchanger 115, and the carbon dioxide flowing out of the outlet of the second liquid carbon dioxide storage tank 103 is cooled and liquefied in the second heat exchanger 108 (condensation piece) by the heat exchange medium of the cold storage heat exchanger 115 after being expanded, and enters the first liquid carbon dioxide storage tank 101 for storage.
In some embodiments, a heat exchanger may be disposed between the compressor 102 and the second liquid carbon dioxide storage tank 103, and the high-temperature and high-pressure carbon dioxide discharged from the compressor 102 is further cooled to a liquid state by using the ambient water as a cold source (the ambient water is used as a heat exchange medium of the heat exchanger), so as to be stored in a high-pressure liquid state. The invention also considers the local environment characteristics, the energy release side can also adopt supercritical state storage, or a throttle valve or an expansion machine is additionally arranged between the compressor 102 and the second liquid carbon dioxide storage tank 103 by utilizing the linde circulation principle or the claude circulation principle, so that the high-pressure carbon dioxide is reduced to normal pressure, and a certain amount of cold compensation is carried out, thereby realizing near-normal pressure liquid storage and reducing the pressure-bearing requirement on the storage tank.
In some embodiments, the carbon dioxide capturing, energy storage and peak shaving system based on cold energy utilization of liquefied natural gas provided by the invention can comprise a carbon dioxide capturing unit, an energy storage unit, a power generation unit, a liquefied natural gas utilization unit, a cold storage and heat storage unit and a carbon dioxide storage unit.
Carbon dioxide capture unit: the air firstly enters the absorption tower 22 through the air compression structure 21, the absorbed rich liquid is absorbed by the absorption liquid sprayed on the top of the absorption tower 22, the absorbed rich liquid enters the lean liquid rich liquid heat exchanger 23, the absorbed lean liquid enters the regeneration tower 24 after absorbing the heat of the lean liquid, the rich liquid is decompressed and analyzed in the regeneration tower 24, the obtained lean liquid exits from the bottom of the regeneration tower 24, enters the lean liquid rich liquid heat exchanger 23 and exchanges heat with the rich liquid and then enters the absorption tower 22, the carbon dioxide absorption solution forms a closed cycle, the air treated in the absorption tower 22 is directly discharged, and the carbon dioxide analyzed in the regeneration tower 24 passes through the carbon dioxide compression structure 25, enters the first heat exchanger 3 and is fully cooled and liquefied by liquefied natural gas, and then enters the first liquid carbon dioxide storage tank 101 for storage.
An energy storage unit: the carbon dioxide working medium stored in the first liquid carbon dioxide storage tank 101 is depressurized by the first throttle valve 105, enters the cold storage heat exchanger 115 to absorb heat and vaporize, sequentially passes through the compressor 102 group to perform multi-stage compression to release compression heat, improves compression efficiency, is subjected to multi-stage cooling, is completely changed into a supercritical state after being compressed, enters the last cooler 106 (the fourth cooler 106) to be cooled to be in a high-pressure liquid state, and then enters the second liquid carbon dioxide storage tank 103 to be stored. The compressor 102 in the energy storage unit is driven by off-peak or waste electricity, converting electrical energy into potential and thermal energy.
And a power generation unit: the carbon dioxide working medium stored in the second liquid carbon dioxide storage tank 103 is depressurized through the second throttle valve 107, sequentially passes through multi-stage expansion, sequentially passes through multi-stage heating during the multi-stage expansion, can improve the expansion power generation efficiency, and gaseous carbon dioxide at the outlet of the first expander 104 enters the second heat exchanger 108 after being cooled through the cold storage heat exchanger 115, is further fully cooled to be completely liquid by liquefied natural gas, and then enters the first liquid carbon dioxide storage tank 101 for storage. The power generation unit generates power by expanding carbon dioxide during the power utilization peak period, and converts potential energy in the carbon dioxide into electric energy.
Liquefied natural gas utilization unit: the lng stored in the lng tank 5 carries a large amount of cold energy, and a part of the lng enters the first heat exchanger 3 to cool the carbon dioxide trapped in the air to a liquid state, and then enters the first liquid carbon dioxide tank 101 to be stored, and the other part enters the second heat exchanger 108 to deeply cool the carbon dioxide flowing out of the outlet of the cold storage heat exchanger 115. The natural gas after the re-heating enters the second expander 109 to generate electricity, so that the overall power generation capacity of the system is improved.
And a cold and heat accumulation unit: in the energy storage state, the low-pressure carbon dioxide at the outlet of the first throttle valve 105 enters the cold storage heat exchanger 115 to release cold energy, the cold energy is evaporated and vaporized and then enters the compressor 102, the cold energy is stored in the cold storage heat exchanger 115, the heat-conducting medium in the cold storage tank 113 carries the cold energy to sequentially enter the three-stage cooler 106 to recover compression heat, and the heat-conducting medium after absorbing the heat flows into the heat storage tank 112 to be stored; in the state of releasing energy (generating electricity), the heat-conducting medium in the heat storage tank 112 carries heat to sequentially enter the three-stage heater to heat the carbon dioxide working medium, releasing the heat, and the cooled carbon dioxide working medium flows into the cold storage tank 113 to be stored. The carbon dioxide at the outlet of the first expander 104 enters the cold storage heat exchanger 115 to absorb cold energy to cool.
A carbon dioxide storage unit: the first liquid carbon dioxide storage tank 101 is used for storing carbon dioxide on the energy storage side, the second liquid carbon dioxide storage tank 103 is used for storing carbon dioxide on the energy release side, and corresponding heat preservation measures are provided for realizing the stability of the storage state.
In summary, the invention has at least the following beneficial effects:
1. the carbon dioxide energy storage peak regulation technology based on liquefied natural gas cold energy utilization is innovatively provided for solving the problem of large-scale long-time energy storage, and can effectively balance a power grid, counter-impact the fluctuation of new energy power generation and realize stable power supply.
2. The invention uses carbon dioxide as the energy storage working medium, has good environmental protection performance, captures carbon dioxide from air, stores the carbon dioxide in a low-pressure liquid state and a high-pressure liquid state respectively, has a simple and compact system, and is suitable for large-scale popularization and application.
3. The invention utilizes the cold energy of the liquefied natural gas to fully cool and liquefy the carbon dioxide, and simultaneously utilizes the natural gas after the re-temperature to expand and generate power, thereby improving the overall power generation efficiency of the system.
4. The invention has the advantages of high energy storage density, small occupied area, stable operation, compact system, lower cost and the like, and improves the energy storage and energy release efficiency through multistage compression and expansion.
In this embodiment, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "manner," "particular modes," or "some modes," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or mode is included in at least one embodiment or mode of the embodiments of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or manner. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or ways. Furthermore, various embodiments or modes and features of various embodiments or modes described in this specification can be combined and combined by those skilled in the art without mutual conflict.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a carbon dioxide entrapment energy storage peak shaver system based on cold energy utilization of liquefied natural gas which characterized in that includes:
a liquid carbon dioxide energy storage and release device (1);
a carbon dioxide capturing device (2);
the first heat exchanger (3) is provided with a first heat exchange channel and a second heat exchange channel, the outlet of the carbon dioxide capturing device (2) is communicated with the inlet of the liquid carbon dioxide energy storage and release device (1) through the first heat exchange channel, and the first heat exchanger (3) is used for liquefying carbon dioxide flowing out of the outlet of the carbon dioxide capturing device (2);
a first generator (4) connected to the liquid carbon dioxide energy storage and release device (1);
the liquefied natural gas storage tank (5) is provided with a liquefied natural gas outlet, and the liquefied natural gas outlet is communicated with the second heat exchange channel and is used for providing cold energy for the first heat exchanger (3).
2. The liquefied natural gas cold energy utilization-based carbon dioxide capturing, energy storage and peak shaving system according to claim 1, wherein the liquefied carbon dioxide energy storage and release device (1) comprises a first liquefied carbon dioxide storage tank (101), at least one compressor (102), a second liquefied carbon dioxide storage tank (103) and a first expander (104) which are sequentially communicated, an outlet of the first expander (104) is communicated with a backflow port of the first liquefied carbon dioxide storage tank (101) so as to form a first circulation loop for flowing carbon dioxide, the liquefied carbon dioxide energy storage and release device (1) further comprises a first throttle valve (105), at least one cooler (106) and a second throttle valve (107), the first throttle valve (105) is arranged between the first liquefied carbon dioxide storage tank (101) and the compressor (102), at least one cooler (106) is arranged between the compressor (102) and the second liquefied carbon dioxide storage tank (103), and the second throttle valve (107) is arranged between the first expander (104) and the first expander (104).
3. The carbon dioxide capturing, energy storage and peak shaving system based on cold energy utilization of liquefied natural gas according to claim 2, wherein the liquefied carbon dioxide energy storage and release device (1) further comprises a second heat exchanger (108) having a third heat exchange channel and a fourth heat exchange channel, the first expander (104) is sequentially communicated with the first liquefied carbon dioxide storage tank (101) through the third heat exchange channel, and the liquefied natural gas outlet is further communicated with the fourth heat exchange channel.
4. A carbon dioxide capture, energy storage and peak shaver system based on cold energy utilization of liquefied natural gas according to claim 3, wherein the liquid carbon dioxide energy storage and release device (1) further comprises a second expander (109) and a second generator (110);
the outlet of the second heat exchange channel is communicated with the outlet of the fourth heat exchange channel, the inlet of the second expander (109), and the output shaft of the second expander (109) is connected with the second generator (110) so as to drive the second generator (110) to generate electric energy.
5. The liquefied natural gas cold energy utilization based carbon dioxide capture, energy storage and peak shaver system according to claim 4, wherein the liquid carbon dioxide energy storage and release device (1) further comprises at least one carbon dioxide heater (111) arranged between the second liquid carbon dioxide storage tank (103) and the first expander (104).
6. The liquefied natural gas cold energy utilization-based carbon dioxide capturing, energy storage and peak shaving system according to claim 5, wherein the liquid carbon dioxide energy storage and release device (1) further comprises a heat storage tank (112) and a cold storage tank (113), the cooler (106) has a fifth heat exchange channel and a sixth heat exchange channel, and the carbon dioxide heater (111) has a seventh heat exchange channel and an eighth heat exchange channel;
the compressor (102) is communicated with the second liquid carbon dioxide storage tank (103) through the fifth heat exchange channel;
the sixth heat exchange channel, the heat storage tank (112), the seventh heat exchange channel and the cold storage tank (113) are sequentially communicated to form a second circulation loop for the heat conduction medium to flow;
the second liquid carbon dioxide storage tank (103) is communicated with the first expander (104) through the eighth heat exchange channel.
7. The lng cold energy utilization based carbon dioxide capture, energy storage and peak shaver system according to claim 5, wherein the liquid carbon dioxide energy storage and release device (1) further comprises at least one third expander (114) arranged between at least one of the carbon dioxide heater (111) and the first expander (104).
8. The lng cold energy utilization based carbon dioxide capture, energy storage and peak shaver system according to claim 7, wherein the compressor (102), the cooler (106), the third expander (114) and the carbon dioxide heater (111) are plural; one cooler (106) is arranged between every two adjacent compressors (102); and one third expander (114) is arranged between every two adjacent carbon dioxide heaters (111).
9. The liquefied natural gas cold energy utilization-based carbon dioxide capturing, energy storage and peak shaving system according to claim 2, wherein the liquid carbon dioxide energy storage and release device (1) further comprises a cold storage heat exchanger (115) comprising a connected evaporation piece and a condensation piece, wherein the first liquid carbon dioxide storage tank (101), the first throttle valve (105), the evaporation piece and the compressor (102) are sequentially communicated, the evaporation piece is used for enabling carbon dioxide to absorb heat and evaporate, and the condensation piece is arranged between the first expansion machine (104) and the first heat exchanger (3) and is used for enabling the carbon dioxide to release heat and liquefy.
10. The carbon dioxide capture energy storage peak shaver system based on cold energy utilization of liquefied natural gas according to any one of claims 1 to 9, wherein the carbon dioxide capture device (2) comprises:
an air compression structure (21);
an absorption tower (22), an air outlet of the air compression structure (21) is communicated with a gas inlet of the absorption tower (22);
a lean solution rich solution heat exchanger (23) having a lean solution chamber and a rich solution chamber, wherein a rich solution outlet of the absorption tower (22) is communicated with an inlet of the rich solution chamber;
a regeneration tower (24), wherein an outlet of the rich liquid chamber is communicated with a rich liquid inlet of the regeneration tower (24), and a lean liquid outlet of the regeneration tower (24) is communicated with an inlet of the lean liquid chamber;
the carbon dioxide compression structure (25), the entry of carbon dioxide compression structure (25) intercommunication regeneration tower (24) carbon dioxide export, the export of carbon dioxide compression structure (25) is through first heat transfer passageway intercommunication liquid carbon dioxide energy storage and release can the entry of device (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310417007.2A CN116576398A (en) | 2023-04-18 | 2023-04-18 | Carbon dioxide trapping energy storage peak regulation system based on cold energy utilization of liquefied natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310417007.2A CN116576398A (en) | 2023-04-18 | 2023-04-18 | Carbon dioxide trapping energy storage peak regulation system based on cold energy utilization of liquefied natural gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116576398A true CN116576398A (en) | 2023-08-11 |
Family
ID=87538628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310417007.2A Pending CN116576398A (en) | 2023-04-18 | 2023-04-18 | Carbon dioxide trapping energy storage peak regulation system based on cold energy utilization of liquefied natural gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116576398A (en) |
-
2023
- 2023-04-18 CN CN202310417007.2A patent/CN116576398A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Nguyen et al. | Proton exchange membrane fuel cells heat recovery opportunities for combined heating/cooling and power applications | |
| CN110374838B (en) | Transcritical carbon dioxide energy storage system and method based on LNG (liquefied Natural gas) cold energy utilization | |
| CN104279012B (en) | A kind of nuclear power peak regulation system based on deep cooling energy storage | |
| CN111648833B (en) | Liquefied air energy storage system for improving frequency modulation performance by utilizing gas buffer device | |
| CN110159379B (en) | Multistage heat pump type double-tank molten salt energy storage power generation system | |
| CN114198170B (en) | Carbon dioxide energy storage system based on double heat storage loops and working method thereof | |
| CN112325497A (en) | Liquefied carbon dioxide energy storage system and application thereof | |
| CN110171553B (en) | Comprehensive utilization system for waste heat of hydrogen fuel cell power ship | |
| CN102758748A (en) | High-pressure liquid air energy storage/release system | |
| CN111927584A (en) | Liquid compressed air energy storage system and method for improving operation flexibility of thermal power generating unit | |
| CN114060111B (en) | Liquid compressed air energy storage method and system for utilizing waste heat of circulating water of thermal power generating unit | |
| CN102094772B (en) | Solar energy-driven cogeneration device | |
| CN114033515B (en) | Liquid compressed air energy storage method and system with injection converging device | |
| CN210622880U (en) | Multi-stage heat pump type double-tank molten salt energy storage power generation system | |
| CN112254369A (en) | Liquid air energy storage system adopting absorption type air inlet precooling | |
| CN116105386A (en) | Photo-thermal composite ammonia absorption type multi-energy combined supply system | |
| CN116641769A (en) | Energy storage utilization system based on carbon dioxide working medium | |
| CN114060112B (en) | Liquid compressed air energy storage method and system for utilizing exhaust waste heat of air cooling unit | |
| CN116576398A (en) | Carbon dioxide trapping energy storage peak regulation system based on cold energy utilization of liquefied natural gas | |
| CN213540514U (en) | Liquid air energy storage system with self-absorption of compression heat | |
| CN114622960A (en) | Transcritical carbon dioxide energy storage system | |
| CN114704341A (en) | Renewable energy comprehensive utilization system based on compressed carbon dioxide energy storage | |
| CN210622879U (en) | Single-tank closed type circulating energy storage power generation system | |
| CN112112694A (en) | Liquid air energy storage system and method for self-absorption of compression heat | |
| CN116591794A (en) | Liquid carbon dioxide energy storage power generation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |