CN114152013B - Working method of movable hydrate phase-change microcapsule cold accumulation system - Google Patents
Working method of movable hydrate phase-change microcapsule cold accumulation system Download PDFInfo
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- CN114152013B CN114152013B CN202111317719.4A CN202111317719A CN114152013B CN 114152013 B CN114152013 B CN 114152013B CN 202111317719 A CN202111317719 A CN 202111317719A CN 114152013 B CN114152013 B CN 114152013B
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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
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/021—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material and the heat-exchanging means being enclosed in one container
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Other Air-Conditioning Systems (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
A movable hydrate phase change microcapsule cold accumulation system belongs to the technical field of microcapsule cold accumulation devices. The system comprises a cold accumulation circulation unit and a cold release circulation unit, wherein the cold accumulation circulation unit is connected with a refrigeration compressor by adopting a cold accumulation tank, the cold accumulation tank is connected with the cold release tank through a pipeline, and a circulation loop is formed by matching a pump and a valve; the cooling tank in the cooling unit is connected with the plate heat exchanger at the user side through a pipeline to form a circulation loop. The two circulation units exchange energy in the cooling tank, and the movable heat exchange mode of the hydrate phase-change microcapsule is adopted, so that the movement of the phase-change capsule is enhanced, and the heat exchange effect is improved to the maximum extent. And the refrigerant fluid with the cold quantity obtained in the cold release tank is circulated to the user side for heat exchange, and the microcapsule with the cold quantity released in the cold release tank is circulated to the cold accumulation tank for cooling again. The cold accumulation system is ensured to always keep one path of recovery and one path of heat exchange state in the operation process, the cold release time is effectively shortened, and the quick refrigeration is realized.
Description
Technical Field
The invention relates to a movable hydrate phase-change microcapsule cold accumulation system, and belongs to the technical field of hydrate phase-change microcapsule cold accumulation devices.
Background
At present, the load rate of main power grids in China is reduced year by year, peak-valley difference is larger and larger, and various energy storage technologies are required to be greatly popularized in order to ensure the safe and stable operation of the power grids. Therefore, the research on the novel cold accumulation technology has certain practical significance and economic benefit. The cold accumulation technology can improve the running condition of the generator set of the power plant, and reduce the consumption of fossil fuel and the investment of the peak shaving power station with high running cost and low efficiency. At present, a water cold storage system is commonly used, but the phase transition temperature is low, and the refrigerating unit efficiency is low. The phase change material cold storage system is a novel energy storage system, wherein hydrate phase change latent heat is huge, a hydrate phase change material with higher latent heat value is packaged in the phase change material by utilizing a packaging technology of phase change microcapsules, and phase change is generated through hydrate crystallization and decomposition of the hydrate material so as to store and release energy, so that the phase change material cold storage system is high in efficiency, small in occupied area and small in volume, and is expected to replace the existing water cold storage technology in the future, and commercial application is realized.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a movable hydrate phase-change microcapsule cold accumulation system; by utilizing the advantage of high hydrate phase-change latent heat value, thermodynamic additives such as cyclopentane and tetrabutylammonium bromide are selected as guest molecules for encapsulation, so that emergency refrigeration of the data center with smaller volume and higher heat exchange efficiency is realized.
In order to achieve the technical purpose, the invention is realized by the following technical scheme: the movable hydrate phase change microcapsule cold accumulation system comprises a cold accumulation tank and a cold release tank, wherein the cold accumulation tank is connected with a refrigeration compressor through a pipeline, and is connected to a common pipe after passing through a cold accumulation valve and a cold accumulation pump, and the common pipe is connected to a filter arranged in the cold release tank
Is arranged on the spiral heat exchanger;
the cold accumulation system is provided with two branches, wherein one branch is that a cold release tank is connected to the cold accumulation tank through a cold flow return pipe after passing through a cold release valve, a cold release pump and a cold accumulation inlet valve in sequence; the other branch is connected to the plate heat exchanger through a cold flow heat exchange pipe after passing through a plate heat exchange front valve and a plate heat exchange front pump in sequence through an outlet of a filter screen arranged on the cooling release tank; the plate heat exchanger is connected to the spiral heat exchanger through a common pipe sequentially through a plate-type post-exchange pump and a plate-type post-exchange valve;
a common valve is arranged on the common pipe;
the cold accumulation system is also provided with a controller which is electrically connected with the cold accumulation valve, the common valve, the plate type back valve, the plate type front valve, the cold release valve and the cold accumulation inlet valve;
the cold storage tank is provided with refrigerant fluid and hydrate phase-change microcapsules, thermodynamic additives such as cyclopentane and tetrabutylammonium bromide are encapsulated in the hydrate phase-change microcapsules, and the cyclopentane and the tetrabutylammonium bromide are used as guest molecules to be encapsulated
The cold accumulation pump and the cold release pump are high-lift impeller pumps, and the plate-type pump before exchange and the plate-type pump after exchange are low-lift impeller pumps.
The cold storage valve, the common valve, the plate type back valve, the plate type front valve, the cold release valve and the cold storage inlet valve are electromagnetic butterfly valves.
The working method of the movable hydrate phase change microcapsule cold accumulation system comprises the following steps:
s1, a refrigeration compressor performs cold accumulation operation on a cold accumulation tank by utilizing valley electricity when a system does not need to operate;
s2, responding to a high-temperature alarm signal sent by a user side, enabling the refrigerant fluid and the phase-change microcapsule which are subjected to cold accumulation in the cold accumulation tank to flow out through the cold accumulation pump through the cold accumulation valve, and opening the refrigerant fluid of the common valve to enter the spiral heat exchanger through a pipeline to exchange heat with the fluid in the cold release tank;
s3, enabling the refrigerant fluid with the cold quantity obtained in the cold release tank to pass through a filter screen so as to enable the phase change microcapsule to be left in the tank body, enabling the refrigerant fluid to pass through a plate type pre-exchange valve, and enabling the refrigerant fluid to pass through a plate type heat exchanger at a user side for heat exchange under the action of a plate type pre-exchange pump;
s4, enabling the microcapsule with the cold quantity released in the cold release tank to return to the cold storage tank through the cold storage inlet valve under the action of the cold release pump, and then enabling the microcapsule to store cold again through the refrigeration compressor;
s5, refrigerant fluid with the cooling capacity released by the plate heat exchanger sequentially passes through the plate heat exchange valve and the common valve through the plate heat exchange pump and returns to the cooling release tank again to complete one cycle; repeating the steps, and performing continuous refrigeration.
The beneficial effects of the invention are as follows: the system comprises a cold accumulation circulation unit and a cold release circulation unit, wherein the cold accumulation circulation unit is connected with a refrigeration compressor by adopting a cold accumulation tank, the cold accumulation tank is connected with the cold release tank through a pipeline, and a circulation loop is formed by matching a pump and a valve; the cooling tank in the cooling unit is connected with the plate heat exchanger at the user side through a pipeline to form a circulation loop. The two circulation units exchange energy in the cooling tank, and the movable heat exchange mode of the hydrate phase-change microcapsule is adopted, so that the movement of the phase-change capsule is enhanced, and the heat exchange effect is improved to the maximum extent. And the refrigerant fluid with the cold quantity obtained in the cold release tank is circulated to the user side for heat exchange, and the refrigerant fluid with the cold quantity released in the cold release tank is circulated to the cold accumulation tank for cooling again. The cold accumulation system is ensured to always keep one path of recovery and one path of heat exchange state in the operation process, the cold release time is effectively shortened, and the quick refrigeration is realized. The electromagnetic butterfly valve and the circulation of the system are intelligently controlled by the program control unit.
The adopted hydrate phase-change microcapsule cold storage system can effectively reduce the volume of the cold storage tank, adopts a movable phase-change microcapsule heat exchange mode, strengthens the movement of the phase-change capsules relative to the traditional fixed phase-change capsule heat exchange mode, and furthest improves the heat exchange effect between the refrigerant water and the phase-change microcapsules. The phase-change cold accumulation system is based on the advantage of high latent heat of the hydrate phase-change microcapsule, the volume of cold accumulation equipment can be greatly reduced, and the heat exchange efficiency is greatly improved compared with a traditional heat exchange device on the premise of reducing the volume of the phase-change cold accumulation system by utilizing the larger latent heat value of the phase-change material through the optimal design of the structure of the cold accumulation system. The hydrate phase-change microcapsule cold storage system can effectively overcome the defects of huge occupied volume and lower heat exchange efficiency of the conventional cold storage equipment, and can be widely applied to emergency refrigeration devices of data centers and refrigeration of various large-volume commercial areas.
Drawings
Fig. 1 is a schematic diagram of a mobile hydrate phase change microcapsule cold storage system.
In the figure: 1. cold flow return pipe, 2, cold storage pump, 3, cold release pump, 4, plate type post-exchange pump, 5, plate type pre-exchange pump, 6, cold flow heat exchange pipe, 7, cold storage tank, 8, cold release tank, 9, common pipe, 10, controller, 11, spiral heat exchanger, 12, refrigeration compressor, 13, plate type heat exchanger, 14, cold storage valve, 15, common valve, 16, plate type post-exchange valve, 17, plate type pre-exchange valve, 18, cold release valve, 19, cold storage inlet valve, 20, filter screen.
Detailed Description
The following describes the embodiments of the present invention in detail with reference to specific technical schemes and drawings.
Fig. 1 shows a movable hydrate phase-change microcapsule cold storage system, which comprises a cold storage tank 7 and a cold release tank 8, wherein the cold storage tank 7 is connected with a refrigeration compressor 12 through a pipeline, and refrigerant fluid and phase-change microcapsules are arranged in the cold storage tank 7.
The cold accumulation tank 7 is connected to a common pipe 9 after passing through a cold accumulation valve 14 and a cold accumulation pump 2, and the common pipe 9 is connected to a spiral heat exchanger 11 arranged in the cold release tank 8; the cold accumulation system is provided with two branches, wherein one branch is that a cold release tank 8 is connected to a cold accumulation tank 7 through a cold flow return pipe 1 after passing through a cold release valve 18, a cold release pump 3 and a cold accumulation inlet valve 19 in sequence; the other branch is connected to the plate heat exchanger 13 through the cold flow heat exchange tube 6 after passing through the plate heat exchange front valve 17 and the plate heat exchange front pump 5 in sequence from an outlet of the filter screen 20 arranged on the cooling release tank 8; the plate heat exchanger 13 is connected to the spiral heat exchanger 11 through the plate post-exchange pump 4 and the plate post-exchange valve 16 in sequence by the common pipe 9; the common pipe 9 is provided with a common valve 15;
the cold accumulation system is also provided with a controller 10, wherein the controller 10 is electrically connected with a cold accumulation valve 14, a common valve 15, a plate type back-exchange valve 16, a plate type front-exchange valve 17, a cold release valve 18 and a cold accumulation inlet valve 19; the cold accumulation pump 2 and the cold release pump 3 are high-lift impeller pumps, and the plate-type pre-exchange pump 5 and the post-exchange pump 4 are low-lift impeller pumps. The cold storage valve 14, the common valve 15, the plate type back exchange valve 16, the plate type front exchange valve 17, the cold release valve 18 and the cold storage inlet valve 19 are electromagnetic butterfly valves.
When the technical scheme is adopted for working, the method specifically comprises the following steps:
1. after the refrigeration compressor 12 finishes the cold accumulation operation on the cold accumulation tank 7, cold water of the cold accumulation finished refrigerant in the cold accumulation tank 7 and hydrate phase change microcapsules after the cold accumulation finished flow out from the cold accumulation valve 14 and pass through the cold accumulation pump 2, and cold fluid enters the spiral heat exchanger 11 through a pipeline through the common valve 15 controlled by the controller 10 to exchange heat with fluid in the cold release tank 8.
2. The fluid with cold energy obtained in the cold release tank 8 passes through the filter mesh screen 20, so that the hydrate phase change microcapsule is remained in the tank body, and the chilled water passes through the plate type pre-exchange valve 17, and is led to a user end for heat exchange through the plate type heat exchanger 13 under the action of the plate type pre-exchange pump 5.
3. The fluid with the released cold energy in the cold release tank 8 is returned to the cold storage tank 7 through the cold storage inlet valve 19 controlled by the controller 10 under the action of the high-lift impeller pump 3 by controlling the cold release valve 18 through the controller 10, and is subjected to cold storage again through the refrigeration compressor 12.
4. The fluid discharged from the plate heat exchanger 13 passes through the common valve 15 controlled by the controller 10 and the plate-type post-exchange valve 16 in sequence through the small-lift impeller pump 4 and returns to the cold discharge tank 8 again to wait for the next cold exchange.
5. The first operation is continued to be repeated until the temperature of the required user side reaches the proper temperature.
The above description is merely one example of the embodiments of the present invention, and any modifications, equivalents, improvements, etc. made within the principles of the present invention should be included in the scope of the invention.
Claims (3)
1. A working method of a movable hydrate phase change microcapsule cold accumulation system is characterized by comprising the following steps of:
the cold accumulation system comprises a cold accumulation tank (7) and a cold release tank (8), wherein the cold accumulation tank (7) is connected with a refrigeration compressor (12) through a pipeline, and is characterized in that: the cold accumulation tank (7) is connected to a common pipe (9) after passing through a cold accumulation valve (14) and a cold accumulation pump (2), and the common pipe (9) is connected to a spiral heat exchanger (11) arranged in the cold release tank (8);
the cold accumulation system is provided with two branches, wherein one branch is a cold release tank (8) which is connected to a cold accumulation tank (7) through a cold flow return pipe (1) after passing through a cold release valve (18), a cold release pump (3) and a cold accumulation inlet valve (19) in sequence; the other branch is connected to the plate heat exchanger (13) through a cold flow heat exchange tube (6) after passing through a plate type pre-exchange valve (17) and a plate type pre-exchange pump (5) in sequence through an outlet of a filter screen (20) arranged on the cooling release tank (8); the plate heat exchanger (13) is connected to the spiral heat exchanger (11) through a plate post-exchange pump (4) and a plate post-exchange valve (16) through a common pipe (9) in sequence; a common valve (15) is arranged on the common pipe (9);
the cold accumulation system is also provided with a controller (10), wherein the controller (10) is electrically connected with the cold accumulation valve (14), the common valve (15), the plate type back-changing valve (16), the plate type front-changing valve (17), the cold release valve (18) and the cold accumulation inlet valve (19);
the cold accumulation tank (7) is internally provided with refrigerant fluid and hydrate phase change microcapsules;
the working method comprises the following steps:
s1, a refrigeration compressor (12) performs cold accumulation operation on a cold accumulation tank (7) by utilizing valley electricity when a system does not need to operate;
s2, responding to a high-temperature alarm signal sent by a user side, enabling the refrigerant fluid and the hydrate phase-change microcapsule which are subjected to cold accumulation in the cold accumulation tank (7) to flow out through the cold accumulation pump (2) through the cold accumulation valve (14), and opening the common valve (15), wherein the refrigerant fluid enters the spiral heat exchanger (11) through a pipeline to exchange heat with the fluid in the cold release tank (8);
s3, enabling the refrigerant fluid with the cold quantity obtained in the cooling tank (8) to pass through a filter screen (20) so that the hydrate phase-change microcapsules are left in the tank body, and enabling the refrigerant fluid to pass through a plate-type pre-heat-exchange valve (17) and pass through a plate-type heat exchanger (13) at a user side to exchange heat under the action of a plate-type pre-heat-exchange pump (5);
s4, enabling the microcapsule with the cold quantity released in the cold release tank (8) to return to the cold storage tank (7) through the cold storage inlet valve (19) under the action of the cold release pump (3) through the cold release valve (18), and then enabling the microcapsule to store cold again through the refrigeration compressor (12);
s5, refrigerant fluid with the cooling capacity released by the plate heat exchanger (13) returns to the cooling release tank (8) again through the plate heat exchange valve (16) and the common valve (15) in sequence through the plate heat exchange pump (4), so that circulation is completed; repeating the above procedures, and performing continuous refrigeration.
2. The method for operating a mobile hydrate phase change microcapsule cold accumulation system according to claim 1, wherein the method comprises the following steps: the cold accumulation pump (2) and the cold release pump (3) are high-lift impeller pumps, and the plate-type pre-exchange pump (5) and the plate-type post-exchange pump (4) are low-lift impeller pumps.
3. The method for operating a mobile hydrate phase change microcapsule cold accumulation system according to claim 1, wherein the method comprises the following steps: the cold accumulation valve (14), the common valve (15), the plate type back-exchanging valve (16), the plate type front-exchanging valve (17), the cold release valve (18) and the cold accumulation inlet valve (19) are electromagnetic butterfly valves.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111317719.4A CN114152013B (en) | 2021-11-09 | 2021-11-09 | Working method of movable hydrate phase-change microcapsule cold accumulation system |
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| CN202111317719.4A CN114152013B (en) | 2021-11-09 | 2021-11-09 | Working method of movable hydrate phase-change microcapsule cold accumulation system |
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| CN114152013A CN114152013A (en) | 2022-03-08 |
| CN114152013B true CN114152013B (en) | 2023-08-11 |
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| CN114413369B (en) * | 2022-03-28 | 2022-06-21 | 深圳市森若新材科技有限公司 | Cold storage air conditioning system based on nano microcapsule suspension phase change material and control method |
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| CN114152013A (en) | 2022-03-08 |
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