CN108895868B - Direct contact type heat storage and release system and working method thereof - Google Patents
Direct contact type heat storage and release system and working method thereof Download PDFInfo
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- CN108895868B CN108895868B CN201810742602.2A CN201810742602A CN108895868B CN 108895868 B CN108895868 B CN 108895868B CN 201810742602 A CN201810742602 A CN 201810742602A CN 108895868 B CN108895868 B CN 108895868B
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- 238000005338 heat storage Methods 0.000 title abstract description 51
- 238000000034 method Methods 0.000 title abstract description 13
- 239000007789 gas Substances 0.000 abstract description 63
- 239000007788 liquid Substances 0.000 abstract description 45
- 239000012188 paraffin wax Substances 0.000 abstract description 42
- 239000002245 particle Substances 0.000 abstract description 36
- 230000005587 bubbling Effects 0.000 abstract description 20
- 238000001816 cooling Methods 0.000 abstract description 19
- 238000005507 spraying Methods 0.000 abstract description 9
- 239000002918 waste heat Substances 0.000 abstract description 6
- 238000004146 energy storage Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000007787 solid Substances 0.000 description 21
- 241000282414 Homo sapiens Species 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000011232 storage material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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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
-
- 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)
Abstract
The invention discloses a direct contact type heat storage and release system and a working method thereof, and belongs to the field of energy storage. The system comprises a heat storage heat exchanger, a heat source gas pump, a gas-liquid three-phase bubbling tower, a cold source gas pump, a heat storage tank, a working medium pump, a heat release valve, a spraying device, a granulating three-phase cooling tower, a conveying device, a particle bin, a heat storage valve and a heat release heat exchanger; solar energy resources or factory waste heat are stored in paraffin with a heat storage function, and the stored heat energy is released in a period of shortage of the solar energy resources or insufficient heat energy supply. The heat energy supply and demand balance can be realized, the effective recovery and the utilization of waste heat resources are realized, and compared with the traditional dividing wall type heat storage and heat release, the direct contact type heat storage and heat release can improve the heat exchange efficiency and save the cost.
Description
Technical Field
The invention designs a direct contact type heat storage and release system and a working method thereof, and belongs to the field of energy storage.
Background
Energy is the material basis of human activities, in a sense that the development of human society is not separated from the use of excellent energy and advanced energy technologies. In the current world, the development of energy sources is a problem of common concern worldwide and human beings, and is also an important problem of the social and economic development of China. Although energy may exist in a variety of forms, such as mechanical, acoustic, chemical, electromagnetic, optical, thermal and nuclear, most of the energy is transformed and utilized in human activities through the form and link of thermal energy.
The direct contact heat exchange is increasingly applied to various engineering examples, such as sea water desalination, geothermal power generation, ocean energy conversion, medium-low temperature energy recovery, wastewater treatment and the like, due to the characteristics of strong corrosion resistance, difficult scaling, high heat exchange coefficient, small investment and the like. The high efficiency of direct contact heat exchange makes the heat exchange a popular research content for many students. The direct contact type heat storage and release system can greatly improve heat exchange efficiency, and store and release more heat in the same time.
The paraffin wax has the advantages of large phase change latent heat, low melting point, small volume change in the solid and liquid change process, good thermal stability, no supercooling phenomenon and the like, so that the paraffin wax is widely applied to energy storage materials. And does not react when in contact with the gas, and is therefore useful for direct contact with energy storage materials.
Disclosure of Invention
The invention utilizes the advantages of large phase change latent heat, low melting point, small volume change in the solid and liquid change process, good thermal stability, no supercooling phenomenon and the like of paraffin wax, and is used as a heat storage material of a direct contact heat storage and release system, and the direct contact method can greatly improve the heat exchange efficiency and store and release more heat in the same time.
A direct contact heat storage and release system, characterized by: the system comprises a heat storage heat exchanger, a heat source gas pump, a gas-liquid three-phase bubbling tower, a cold source gas pump, a heat storage tank, a working medium pump, a heat release valve, a spraying device, a granulation three-phase cooling tower, a conveying device, a heat release heat exchanger, a heat storage valve and a particle bin;
the heat storage heat exchanger comprises a hot side inlet, a hot side outlet, a low-temperature gas inlet and a heated gas outlet, the gas-liquid three-phase bubbling tower comprises a solid particle inlet, a high-temperature gas inlet, a low-temperature gas outlet and a molten liquid outlet, the heat storage heat exchanger comprises a high-temperature gas inlet, a cooled gas outlet, a cold side inlet and a cold side outlet, and the granulating three-phase cooling tower comprises a molten liquid inlet, a low-temperature gas inlet, a solid particle outlet and a high-temperature gas outlet;
the outlet of the conveying device is connected with the inlet of the particle bin, and the outlet of the particle bin is connected with the solid particle inlet of the gas-liquid three-phase bubbling tower through a heat storage valve; the molten liquid outlet of the gas-liquid three-phase bubbling tower is connected with the inlet of the heat storage tank; the outlet of the heat storage tank is connected with the inlet of the spraying device through a heat release valve; the outlet of the spraying device and the molten liquid inlet of the granulating three-phase cooling tower; the solid particle outlet of the granulating three-phase cooling tower is connected with the inlet of the conveying device;
the low-temperature gas outlet of the gas-liquid three-phase bubble column is connected with the low-temperature gas inlet of the heat storage heat exchanger through a heat source gas pump; the heated gas outlet of the heat storage heat exchanger is connected with the high-temperature gas inlet of the gas-liquid three-phase bubbling tower; the heat storage heat exchanger heat side inlet is connected with the heat medium system outlet, the heat storage heat exchanger heat side outlet is connected with the heat medium system inlet, and the heat medium is solar heat collection medium;
the high-temperature gas outlet of the granulating three-phase cooling tower is connected with the high-temperature gas inlet of the heat release heat exchanger through a cold source gas pump; the cooled gas outlet of the heat release heat exchanger is connected with the low-temperature gas inlet of the granulating three-phase cooling tower; the cold side inlet of the heat release heat exchanger is connected with the outlet of the refrigerant medium system, and the cold side outlet of the heat release heat exchanger is connected with the inlet of the refrigerant medium system.
The working method of the direct contact type heat storage and release system is characterized by comprising the following steps of:
when the solar energy resources are abundant or waste heat of a factory is discharged, the heat storage valve is opened, the heat release valve is closed, the paraffin particles are conveyed into the particle bin by the conveying device, and the paraffin particles flow through the heat storage valve to enter the gas-liquid three-phase bubbling tower from the solid particle inlet; meanwhile, high-temperature gas heated by the heat storage heat exchanger enters the gas-liquid three-phase bubbling tower from the high-temperature gas inlet; paraffin particles enter from the top of the gas-liquid three-phase bubbling tower and are heated by high-temperature gas entering from the bottom of the gas-liquid three-phase bubbling tower, the paraffin particles are heated and melted into molten paraffin liquid, and the molten paraffin, gas and solid particles coexist in the gas-liquid three-phase bubbling tower. The molten paraffin flows out from a molten liquid outlet to a heat storage tank for storage, the high-temperature gas after the paraffin is heated is cooled into low-temperature gas, the low-temperature gas is discharged from a low-temperature gas outlet of a gas-liquid three-phase bubbling tower and enters a low-temperature gas inlet of a heat storage heat exchanger, and the gas is heated by a heat source medium in the heat storage heat exchanger to start the next cycle; thereby, the process of storing thermal energy is completed.
In the heat use peak period, a heat release valve is opened, a heat storage valve is closed, molten state high-temperature paraffin liquid in the heat storage tank is conveyed through a working medium pump, flows through the heat release valve and is conveyed to a spraying device, and the molten state paraffin liquid enters a granulating three-phase cooling tower from a molten state liquid inlet through the spraying device in the form of liquid drops; meanwhile, low-temperature gas cooled by the heat release heat exchanger enters the granulating three-phase cooling tower from a low-temperature gas inlet, molten paraffin liquid is sprayed from the top of the granulating three-phase cooling tower and cooled by the low-temperature gas entering from the bottom of the granulating three-phase cooling tower, the molten paraffin liquid becomes solid paraffin particles, and the molten paraffin liquid, gas and solid paraffin particles coexist in the granulating three-phase cooling tower. The solid paraffin particles flow out from the bottom of the tower to a conveying device, and the conveying device conveys the solid paraffin particles to a particle bin for storage; the low-temperature gas is heated into high-temperature gas which flows out from the top of the tower to a high-temperature gas inlet of the heat release heat exchanger through the cold source gas pump, and the gas is cooled by the cold source medium in the heat release heat exchanger to start the next cycle. Thereby, the release process of the heat energy is completed.
When the solar energy resources are rich, the solid paraffin is heated into molten paraffin in the gas-liquid three-phase bubbling tower by utilizing solar energy, and the molten paraffin is stored in the heat storage tank, so that heat is stored. When the solar energy is deficient or the waste heat is insufficient, the molten paraffin is subjected to heat release and crystallization in a granulating three-phase cooling tower to form solid particles, and the solid particles are stored in a particle bin, so that heat release is realized. The direct contact heat storage and release system provided by the invention not only can realize recycling of waste heat, but also can improve the heat exchange efficiency of the whole system.
Drawings
FIG. 1 is a schematic diagram of a direct contact heat storage and release system;
FIG. 2 is a diagram of the direct contact heat storage operation process;
FIG. 3 is a diagram of a direct contact exothermic operation;
reference numerals in the figures: the device comprises a 1-heat storage heat exchanger, a 2-heat source gas pump, a 3-gas-liquid three-phase bubbling tower, a 4-cold source gas pump, a 5-heat storage tank, a 6-working medium pump, a 7-heat release valve, an 8-spraying device, a 9-granulation three-phase cooling tower, a 10-conveying device, a 11-heat release heat exchanger, a 12-heat storage valve and a 13-particle bin;
detailed description of the preferred embodiments
Fig. 1 is a diagram of a direct contact heat storage and release system according to the present invention, and the operation of the system will be described with reference to fig. 1.
When the solar energy resources are abundant or waste heat of a factory is discharged, the heat storage valve 12 is opened, the heat release valve 7 is closed, the conveying device 10 conveys paraffin particles into the particle bin 13, and the paraffin particles flow through the heat storage valve 12 to enter the gas-liquid three-phase bubbling tower 3 from the solid particle inlet; meanwhile, high-temperature gas heated by the heat storage heat exchanger 1 enters the gas-liquid three-phase bubbling tower 3 from a high-temperature gas inlet; paraffin particles enter from the top of the gas-liquid three-phase bubbling tower 3 and are heated by high-temperature gas entering from the bottom of the gas-liquid three-phase bubbling tower 3, the paraffin particles are heated and melted into molten paraffin liquid, and the molten paraffin, gas and solid particles coexist in the gas-liquid three-phase bubbling tower 3. The molten paraffin flows out from a molten liquid outlet to a heat storage tank 5 for storage, the high-temperature gas after the paraffin is heated is cooled into low-temperature gas, the low-temperature gas is discharged from a low-temperature gas outlet of a gas-liquid three-phase bubbling tower 3 and enters a low-temperature gas inlet of a heat storage heat exchanger 1, and the gas is heated by a heat source medium in the heat storage heat exchanger 1 to start the next cycle; thereby, the process of storing thermal energy is completed.
In the heat use peak period, the heat release valve 7 is opened, the heat storage valve 12 is closed, molten state high-temperature paraffin liquid in the heat storage tank 5 is conveyed through the working medium pump 6, flows through the heat release valve 7 and is conveyed to the spraying device 8, and the molten state paraffin liquid enters the granulating three-phase cooling tower 9 from the molten state liquid inlet through the spraying device 8 in the form of liquid drops; at the same time, the low-temperature gas cooled by the heat-releasing heat exchanger 11 enters the granulating three-phase cooling tower 9 from the low-temperature gas inlet, molten paraffin liquid is sprayed from the top of the granulating three-phase cooling tower 9 and cooled by the low-temperature gas entering from the bottom of the granulating three-phase cooling tower 9, the molten paraffin liquid becomes solid paraffin particles, and the molten paraffin liquid, gas and solid paraffin particles coexist in the granulating three-phase cooling tower 9. The solid paraffin particles flow out from the bottom of the tower to a conveying device 10, and the conveying device 10 conveys the solid paraffin particles to a particle bin 13 for storage; the low temperature gas is heated to high temperature gas which flows out from the top of the tower to the high temperature gas inlet of the heat release heat exchanger 11 through the cold source gas pump 4, and the gas is cooled by the cold source medium in the heat release heat exchanger 11 to start the next cycle. Thereby, the release process of the heat energy is completed.
Claims (2)
1. A direct contact heat storage and release system, characterized by: the system comprises a heat storage heat exchanger (1), a heat source gas pump (2), a gas-liquid three-phase bubbling tower (3), a cold source gas pump (4), a heat storage tank (5), a working medium pump (6), a heat release valve (7), a spraying device (8), a granulating three-phase cooling tower (9), a conveying device (10), a heat release heat exchanger (11), a heat storage valve (12) and a particle bin (13);
the heat storage heat exchanger (1) comprises a hot side inlet, a hot side outlet, a low-temperature gas inlet and a heated gas outlet, the gas-liquid three-phase bubbling tower (3) comprises a solid particle inlet, a high-temperature gas inlet, a low-temperature gas outlet and a molten liquid outlet, the heat release heat exchanger (11) comprises a high-temperature gas inlet, a cooled gas outlet, a cold side inlet and a cold side outlet, and the granulation three-phase cooling tower (9) comprises a molten liquid inlet, a low-temperature gas inlet, a solid particle outlet and a high-temperature gas outlet;
the outlet of the conveying device (10) is connected with the inlet of the particle bin (13), and the outlet of the particle bin (13) is connected with the solid particle inlet of the gas-liquid three-phase bubbling tower (3) through the heat storage valve (12); the outlet of the molten liquid of the gas-liquid three-phase bubbling tower (3) is connected with the inlet of the heat storage tank (5); the outlet of the heat storage tank (5) is connected with the inlet of the spraying device (8) through a heat release valve (7); an outlet of the spraying device (8) and a molten liquid inlet of the granulating three-phase cooling tower (9); the solid particle outlet of the granulating three-phase cooling tower (9) is connected with the inlet of the conveying device (10);
the low-temperature gas outlet of the gas-liquid three-phase bubble column (3) is connected with the low-temperature gas inlet of the heat storage heat exchanger (1) through the heat source gas pump (2); the heated gas outlet of the heat storage heat exchanger (1) is connected with the high-temperature gas inlet of the gas-liquid three-phase bubbling tower (3); the heat storage heat exchanger (1) has a hot side inlet connected with a hot medium system outlet, the hot side outlet of the heat storage heat exchanger (1) is connected with a hot medium system inlet, and the hot medium is solar heat collection medium;
the high-temperature gas outlet of the granulating three-phase cooling tower (9) is connected with the high-temperature gas inlet of the heat release heat exchanger (11) through the cold source gas pump (4); the cooled gas outlet of the heat release heat exchanger (11) is connected with the low-temperature gas inlet of the granulation three-phase cooling tower (9); the cold side inlet of the heat release heat exchanger (11) is connected with the outlet of the refrigerant medium system, and the cold side outlet of the heat release heat exchanger (11) is connected with the inlet of the refrigerant medium system.
2. The method of operating a direct contact heat storage and release system of claim 1, comprising the steps of:
when the solar energy resources are abundant or waste heat of a factory is discharged, the heat storage valve (12) is opened, the heat release valve (7) is closed, the conveying device (10) conveys paraffin particles into the particle bin (13), and the paraffin particles flow through the heat storage valve (12) and enter the gas-liquid three-phase bubbling tower (3) from the solid particle inlet; meanwhile, high-temperature gas heated by the heat storage heat exchanger (1) enters the gas-liquid three-phase bubbling tower (3) from a high-temperature gas inlet; paraffin particles enter from the top of the gas-liquid three-phase bubbling tower (3) and are heated by high-temperature gas entering from the bottom of the gas-liquid three-phase bubbling tower (3), the paraffin particles are heated and melted into molten paraffin liquid, and the molten paraffin, gas and solid particles coexist in the gas-liquid three-phase bubbling tower (3); the molten paraffin flows out from a molten liquid outlet to a heat storage tank (5) for storage, the high-temperature gas after the paraffin is heated is cooled into low-temperature gas, the low-temperature gas is discharged from a low-temperature gas outlet of a gas-liquid three-phase bubbling tower (3) and enters a low-temperature gas inlet of a heat storage heat exchanger (1), and the gas is heated by a heat source medium in the heat storage heat exchanger (1) to start the next cycle; thereby, the thermal energy storage process is completed;
in the heat use peak period, a heat release valve (7) is opened, a heat storage valve (12) is closed, molten state high-temperature paraffin liquid in a heat storage tank (5) is conveyed through a working medium pump (6), flows through the heat release valve (7) and is conveyed to a spraying device (8), and the molten state paraffin liquid enters a granulating three-phase cooling tower (9) from a molten state liquid inlet through the spraying device (8) in the form of liquid drops; meanwhile, low-temperature gas cooled by the heat release heat exchanger (11) enters the granulating three-phase cooling tower (9) from a low-temperature gas inlet, molten paraffin liquid is sprayed from the top of the granulating three-phase cooling tower (9) and cooled by the low-temperature gas entering from the bottom of the granulating three-phase cooling tower (9), the molten paraffin liquid becomes solid paraffin particles, and the molten paraffin liquid, gas and solid paraffin particles coexist in the granulating three-phase cooling tower (9); the solid paraffin particles flow out from the bottom of the tower to a conveying device (10), and the conveying device (10) conveys the solid paraffin particles to a particle bin (13) for storage; the low-temperature gas is heated into high-temperature gas which flows out from the top of the tower to a high-temperature gas inlet of the heat release heat exchanger (11) through the cold source gas pump (4), and the gas is cooled by the cold source medium in the heat release heat exchanger (11) to start the next cycle; thereby, the release process of the heat energy is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810742602.2A CN108895868B (en) | 2018-07-09 | 2018-07-09 | Direct contact type heat storage and release system and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810742602.2A CN108895868B (en) | 2018-07-09 | 2018-07-09 | Direct contact type heat storage and release system and working method thereof |
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| Publication Number | Publication Date |
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| CN108895868A CN108895868A (en) | 2018-11-27 |
| CN108895868B true CN108895868B (en) | 2024-03-19 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388999A (en) * | 2013-06-25 | 2013-11-13 | 中国科学院工程热物理研究所 | Spray packed bed heat storage device |
| CN105623687A (en) * | 2016-03-02 | 2016-06-01 | 大连理工大学 | Device and method for jointly preparing bio-oil and multihole biochar through fuse salt by spraying biomass for pyrolysis |
| CN106767081A (en) * | 2016-12-30 | 2017-05-31 | 北京建筑大学 | A kind of fountain phase change energy storage apparatus |
| CN107631656A (en) * | 2016-07-15 | 2018-01-26 | 蓝瑚能源科技(上海)有限公司 | Phase-change thermal storage heat exchanger and its system |
| CN208860180U (en) * | 2018-07-09 | 2019-05-14 | 南京航空航天大学 | Direct Contact Heat Storage and Release System |
-
2018
- 2018-07-09 CN CN201810742602.2A patent/CN108895868B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388999A (en) * | 2013-06-25 | 2013-11-13 | 中国科学院工程热物理研究所 | Spray packed bed heat storage device |
| CN105623687A (en) * | 2016-03-02 | 2016-06-01 | 大连理工大学 | Device and method for jointly preparing bio-oil and multihole biochar through fuse salt by spraying biomass for pyrolysis |
| CN107631656A (en) * | 2016-07-15 | 2018-01-26 | 蓝瑚能源科技(上海)有限公司 | Phase-change thermal storage heat exchanger and its system |
| CN106767081A (en) * | 2016-12-30 | 2017-05-31 | 北京建筑大学 | A kind of fountain phase change energy storage apparatus |
| CN208860180U (en) * | 2018-07-09 | 2019-05-14 | 南京航空航天大学 | Direct Contact Heat Storage and Release System |
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| CN108895868A (en) | 2018-11-27 |
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