CN110806131A - High-efficient compact high pressure heat accumulation device - Google Patents
High-efficient compact high pressure heat accumulation device Download PDFInfo
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- CN110806131A CN110806131A CN201910995060.4A CN201910995060A CN110806131A CN 110806131 A CN110806131 A CN 110806131A CN 201910995060 A CN201910995060 A CN 201910995060A CN 110806131 A CN110806131 A CN 110806131A
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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
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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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- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a high-efficiency compact high-pressure heat storage device, which comprises at least two high-pressure packed beds and a normal/low pressure storage bin; the high-pressure packed bed is provided with a high-pressure fluid inlet, a heat storage material inlet, a high-pressure fluid outlet and a heat storage material outlet, and the normal/low pressure storage bin is provided with a material inlet, a material outlet, a normal/low pressure fluid inlet and a normal/low pressure fluid outlet; the heat storage material outlet of the high-pressure packed bed is connected with the material inlet of the normal/low pressure storage bin, and the material outlet of the normal/low pressure storage bin is connected with the heat storage material inlet of the high-pressure packed bed. The invention uses two small-volume high-pressure packed beds and one normal/low pressure storage bin, the heat storage material is continuously loaded and transferred in the high-pressure packed bed and the normal/low pressure storage bin, and the heat storage and the heat release of a large amount of high-pressure fluid can be completed only by using the small-volume high-pressure packed bed and the limited heat storage material, thus having the advantages of high efficiency, compactness and large heat storage capacity.
Description
Technical Field
The invention relates to a high-pressure fluid heat energy storage and utilization technology, in particular to a high-efficiency compact high-pressure heat storage device which can simultaneously and efficiently store a large amount of high-pressure fluid heat and release a large amount of normal/low-pressure fluid heat by utilizing a high-pressure packed bed with a small volume and limited heat storage materials.
Background
Thermal energy storage refers to a technology of storing thermal energy in various heat storage media in a high-temperature or low-temperature manner to balance energy requirements. At present, heat energy storage is widely existed in daily life and industrial production, and can be used for heating, providing hot water, thermal power generation and the like. For example, in a solar power generation system, the problem of fluctuation and discontinuity of renewable energy sources such as solar energy can be effectively solved through the heat storage device. In a gas turbine or a compressed air energy storage system, the heat storage system is arranged, so that the use amount of fossil energy can be effectively reduced, and the system efficiency is improved. The heat storage device can effectively solve the problem of mismatching of supply and demand parties in space and time in the production process, and improves the stability of the system and the utilization efficiency of energy.
The packed bed heat storage is a heat storage mode with the most extensive heat storage application, and the system has simple structure and lower investment cost. The heat storage pressure of the packed bed is usually normal pressure or medium pressure, and when the pressure is increased to transcritical or supercritical pressure, the heat exchange in the packed bed is high-pressure heat exchange. In view of safety considerations, high pressure thermal storage packed beds need to be able to withstand high pressures and temperatures, greatly increasing the cost of thermal storage. And when the heat storage capacity is increased, the volume scale of the packed bed in the conventional heat storage mode is correspondingly increased, the heat storage cost is improved, and meanwhile, the potential safety hazard is increased. If the supercritical air in the supercritical compressed air energy storage system or the supercritical carbon dioxide in the supercritical carbon dioxide energy storage system is subjected to heat storage through the packed bed, the heat storage pressure can reach 10MPa, and if the supercritical energy storage system is enlarged in scale, the heat required to be stored is correspondingly increased. Therefore, when high-capacity high-pressure heat storage is carried out, the traditional packed bed has the defects of more heat storage materials, large occupied area and higher construction cost.
Disclosure of Invention
The invention provides a high-efficiency compact high-pressure heat storage device aiming at the problems of higher cost and smaller capacity of a conventional high-pressure heat storage device.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an efficient compact high-pressure heat storage device comprises at least two high-pressure packed beds and a normal/low pressure storage bin; the high-pressure packed bed is provided with a high-pressure fluid inlet, a heat storage material inlet, a high-pressure fluid outlet and a heat storage material outlet, and the normal/low pressure storage bin is provided with a material inlet, a material outlet, a normal/low pressure fluid inlet and a normal/low pressure fluid outlet; the heat storage material outlet of the high-pressure packed bed is connected with the material inlet of the normal/low-pressure storage bin, and the material outlet of the normal/low-pressure storage bin is connected with the heat storage material inlet of the high-pressure packed bed; the high-pressure fluid exchanges heat with the heat storage material in the high-pressure packed bed, after the heat exchange is finished, the saturated heat storage material enters the normal/low storage bin to exchange heat with the normal/low pressure fluid, and the heat is transferred to the normal/low pressure fluid and then is transported to the high-pressure packed bed to carry out the next round of heat storage; the high-pressure heat exchange in the high-pressure packed bed and the normal/low-pressure heat exchange in the normal/low-pressure storage bin are carried out simultaneously by repeatedly exchanging and transferring heat of the heat storage materials in the high-pressure packed bed and the normal/low-pressure storage bin.
As a modification of the invention, the two high-pressure packed beds alternately perform heat storage, and when one of the high-pressure packed beds performs heat storage material charging or transferring, the other high-pressure packed bed is in a normal heat storage mode. Can ensure the continuous operation of the high-pressure heat storage process.
As an improvement of the invention, the high-pressure packed bed and the normal/low pressure storage bin are externally coated with insulating layers with low heat conductivity coefficients. Heat exchange with the external environment can be reduced as much as possible.
During heat storage, high-temperature and high-pressure fluid flows through the high-pressure fluid inlet to enter the high-pressure packed bed, contacts with the surface of a heat storage material in the high-pressure packed bed during flowing to exchange heat, and flows out through the high-pressure fluid outlet after being cooled. The temperature of the heat storage material absorbs heat and rises, when the heat storage process is carried out to a certain degree, the heat storage material is considered to reach a saturated state, at the moment, the outlet of the heat storage material is opened, and the saturated heat storage material enters the normal/low pressure storage bin through the corresponding pipeline. In the process, when one high-pressure packed bed transfers the heat storage material, the other high-pressure packed bed normally stores heat, and the two high-pressure packed beds alternately store heat so as to ensure the continuous operation of the whole heat storage process.
When releasing heat, the low-temperature normal/low-pressure fluid enters the normal/low-pressure storage bin through the normal/low-pressure fluid inlet, contacts with the surface of the high-temperature saturated heat storage material in the normal/low-pressure storage bin to exchange heat in the flowing process, and flows out from the normal/low-pressure fluid outlet after being heated. The saturated heat storage material is in an unsaturated state after releasing heat, and is transported to a heat storage material inlet of the high-pressure packed bed through a matched transport channel to enter the high-pressure packed bed for next heat storage.
Compared with the prior art, the invention has the beneficial effects that:
the invention can perform heat storage and heat release on a large amount of high-pressure fluid and a large amount of normal/low-pressure fluid only by using the high-pressure packed bed with smaller volume and limited heat storage materials by synchronously performing high-pressure heat exchange in the high-pressure packed bed and normal/low-pressure heat exchange in the normal/low-pressure storage bin and continuously loading and transferring the heat storage materials in the high-pressure packed bed and the normal/low-pressure storage bin, and has the advantages of high efficiency, compactness and large heat storage capacity.
Drawings
Fig. 1 is a schematic structural view of a high-efficiency compact high-pressure thermal storage device of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the high-efficiency compact high-pressure heat storage device comprises two high-pressure packed beds 4, a normal/low pressure storage bin 29 and matched pipelines, valves and a control system.
The upper end of the left high-pressure packed bed 4 is provided with a high-pressure fluid inlet 9 and a matched valve 8, and is also provided with a heat storage material inlet 2 and a matched valve 1. The lower end of the left high-pressure packed bed 4 is provided with a high-pressure fluid outlet 10 and a matched valve 11, and is also provided with a heat storage material outlet 5 and a matched valve 6.
The upper end of the right high-pressure packed bed 4 is provided with a high-pressure fluid inlet 13 and a matched valve 12, and is also provided with a heat storage material inlet 18 and a matched valve 16. The right high pressure packed bed 4 is provided at its lower end with a high pressure fluid outlet 14 and a mating valve 15, and also with a heat storage material outlet 19 and a mating valve 20.
The lower atmospheric/low pressure storage silo 29 is provided at its top surface with two material inlets, respectively a material inlet 7 connected to the heat storage material outlet 5 and a material inlet 21 connected to the heat storage material outlet 20. The atmospheric/low pressure storage 29 has an atmospheric/low pressure fluid inlet 22 and associated valve 23 on the left side and an atmospheric/low pressure fluid outlet 24 and associated valve 25 on the right side. The lower right side of the atmospheric/low pressure storage silo 29 is also provided with a material outlet 26 and associated valve 27 and is connected to the left side thermal storage material inlet 2 and the right side thermal storage material inlet 18 respectively by powered transport channels 28.
The high-pressure packed bed 4 is used as a high-pressure heat exchange device, the wall surface of the high-pressure packed bed 4 is designed to bear higher pressure, for example, the design pressure is 20MPa, the heat storage material 3 is filled in the high-pressure packed bed, the heat storage material 3 can be cobblestones, ceramic balls, metal, concrete, packaged phase change materials and the like, and the heat insulation layer 17 made of heat insulation materials with low heat conductivity coefficients is laid outside the high-pressure packed bed 4 so as to reduce heat dissipation of the high-pressure packed bed 4 to the surrounding environment as far as. The normal/low pressure storage bin 29 can be a common container, has no special requirements on the thickness and the material of the wall surface, and can continuously store the saturated heat storage material 3 from the high pressure packed bed 4 by selecting a storage bin with a large capacity specification according to the requirement so as to increase the heat storage scale of the high pressure fluid. The outside of the normal/low pressure storage silo 10 is also provided with an insulating layer 17 to reduce the heat loss of the heat storage material 3 stored therein.
The working process of the present invention is explained in detail below:
at the start of heat storage, valves 1 and 16 are opened, and after the heat storage material enters two high pressure packed beds 4 through heat storage material inlets 2 and 18, valves 1 and 16 are closed.
The valves 8, 12, 11 and 15 are opened, the high-temperature and high-pressure fluid simultaneously enters the two high-pressure packed beds 4, contacts the heat storage material 3 while flowing in the pores, transfers heat to the heat storage material 3, and the high-pressure fluid after temperature reduction flows out of the high-pressure packed beds 4 through the fluid outlet 10 and the valves 11, 14 and 15. The high pressure packed bed 4 is used for high pressure heat exchange, the bed body needs to be designed to resist high pressure, and the heat preservation layer 17 is laid outside the bed body to reduce heat loss
Taking the left high-pressure packed bed 4 as an example, when the heat storage temperature of the heat storage material 3 in the left high-pressure packed bed 4 reaches a saturated state, the valve 8 is closed, the valve 6 is opened, the saturated heat storage material enters the normal/low pressure storage bin through the heat storage material outlet 5 and the material inlet 7, the valve 6 is closed, the valve 1 is opened, the heat storage material 3 is reloaded, the valve 1 is closed, the valve 8 is opened, and the high-temperature high-pressure fluid flows into the packed bed to start a new heat storage.
The heat storage method of the high-pressure packed bed 4 on the right side is the same as that described above. It should be noted that in order to ensure that the whole heat storage process is uninterrupted, and the high-temperature and high-pressure fluid is subjected to continuous heat storage, the injection and transfer times of the heat storage materials 3 of the two high-pressure packed beds 4 should be staggered. It is easily understood that the number of the high-pressure packed beds 4 may be increased to three or more depending on the heat storage amount.
After the saturated heat storage material is transferred to the normal/low pressure storage bin 29, the valves 23 and 25 are opened, the low temperature normal/low pressure fluid enters the storage bin through the normal/low pressure fluid inlet 22 to exchange heat with the saturated heat storage material in the storage bin, and after the temperature rises, the high temperature normal/low pressure fluid flows out through the normal/low pressure fluid outlet 24. Normal/low pressure heat exchange is carried out in the normal/low pressure storage bin 29, the bin body does not need high pressure resistant design, and a heat insulation layer 17 is laid outside the bin body to reduce heat loss.
The temperature of the saturated heat storage material in the normal/low pressure storage bin 29 is reduced to become an unsaturated state after heat exchange, the valve 27 is opened, and the heat storage material is discharged from the material outlet 26 and is conveyed to the high pressure packed bed 4 through the conveying channel 28 to carry out a new round of heat storage. The heat storage material 3 is recycled in the high-pressure packed bed 4 and the normal/low pressure storage bin 29, the using amount is less, and the heat storage and the heat release of a large amount of high-pressure fluid can be completed by using the high-pressure packed bed 4 with a smaller volume, so that the heat storage device has the advantages of high efficiency, compactness and large heat storage capacity.
The above detailed description is specific to possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. The utility model provides a high-efficient compact high pressure heat storage device which characterized in that: comprises at least two high-pressure packed beds and a normal/low pressure storage bin; the high-pressure packed bed is provided with a high-pressure fluid inlet, a heat storage material inlet, a high-pressure fluid outlet and a heat storage material outlet, and the normal/low pressure storage bin is provided with a material inlet, a material outlet, a normal/low pressure fluid inlet and a normal/low pressure fluid outlet; the heat storage material outlet of the high-pressure packed bed is connected with the material inlet of the normal/low-pressure storage bin, and the material outlet of the normal/low-pressure storage bin is connected with the heat storage material inlet of the high-pressure packed bed; the high-pressure fluid exchanges heat with the heat storage material in the high-pressure packed bed, after the heat exchange is finished, the saturated heat storage material enters the normal/low storage bin to exchange heat with the normal/low pressure fluid, and the heat is transferred to the normal/low pressure fluid and then is transported to the high-pressure packed bed to carry out the next round of heat storage; the high-pressure heat exchange in the high-pressure packed bed and the normal/low-pressure heat exchange in the normal/low-pressure storage bin are carried out simultaneously by repeatedly exchanging and transferring heat of the heat storage materials in the high-pressure packed bed and the normal/low-pressure storage bin.
2. A high efficiency compact high pressure thermal storage apparatus according to claim 1, wherein: the two high-pressure packed beds alternately store heat, and when one high-pressure packed bed is used for loading or transferring heat storage materials, the other high-pressure packed bed is in a normal heat storage mode.
3. A high efficiency compact high pressure thermal storage apparatus according to claim 1, wherein: and the outside of the high-pressure packed bed and the normal/low pressure storage bin is laid with a heat insulation layer with low heat conductivity coefficient.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910995060.4A CN110806131A (en) | 2019-10-18 | 2019-10-18 | High-efficient compact high pressure heat accumulation device |
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| CN201910995060.4A CN110806131A (en) | 2019-10-18 | 2019-10-18 | High-efficient compact high pressure heat accumulation device |
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Citations (11)
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| GB814855A (en) * | 1956-08-31 | 1959-06-10 | Air Preheater | Pellet type heat exchanger |
| US2967693A (en) * | 1956-08-31 | 1961-01-10 | Air Preheater | Pellet type heat exchanger |
| JPS5716785A (en) * | 1980-07-02 | 1982-01-28 | Kobe Steel Ltd | Controlling method of heated fluid temperature in moving layer type heat exchanger |
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| CN101883913A (en) * | 2007-10-03 | 2010-11-10 | 等熵有限公司 | Energy storage |
| CN102288044A (en) * | 2011-07-22 | 2011-12-21 | 湖南天水蓝能源科技有限公司 | Pipeless heat exchanger and residual-heat recovery system |
| CN102869854A (en) * | 2010-02-24 | 2013-01-09 | 等熵有限公司 | Improved heat storage system |
| CN104374213A (en) * | 2014-11-19 | 2015-02-25 | 钢铁研究总院 | Heat exchange device for carrying out heat exchange on solid hot material |
| CN105066757A (en) * | 2015-08-13 | 2015-11-18 | 北方民族大学 | Air heat accumulating and releasing device of solid particles |
| CN109883221A (en) * | 2019-02-25 | 2019-06-14 | 中国科学院广州能源研究所 | A kind of compressed air hold over system |
| CN109945709A (en) * | 2019-02-25 | 2019-06-28 | 中国科学院广州能源研究所 | A kind of high pressure packed bed accumulation of heat/device for cooling |
-
2019
- 2019-10-18 CN CN201910995060.4A patent/CN110806131A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB814855A (en) * | 1956-08-31 | 1959-06-10 | Air Preheater | Pellet type heat exchanger |
| US2967693A (en) * | 1956-08-31 | 1961-01-10 | Air Preheater | Pellet type heat exchanger |
| JPS5716785A (en) * | 1980-07-02 | 1982-01-28 | Kobe Steel Ltd | Controlling method of heated fluid temperature in moving layer type heat exchanger |
| CN101883913A (en) * | 2007-10-03 | 2010-11-10 | 等熵有限公司 | Energy storage |
| CN101828319A (en) * | 2007-10-19 | 2010-09-08 | 塞佩姆股份公司 | Installation and methods for storing and restoring electrical energy using a piston-type gas compression and expansion unit |
| CN102869854A (en) * | 2010-02-24 | 2013-01-09 | 等熵有限公司 | Improved heat storage system |
| CN102288044A (en) * | 2011-07-22 | 2011-12-21 | 湖南天水蓝能源科技有限公司 | Pipeless heat exchanger and residual-heat recovery system |
| CN104374213A (en) * | 2014-11-19 | 2015-02-25 | 钢铁研究总院 | Heat exchange device for carrying out heat exchange on solid hot material |
| CN105066757A (en) * | 2015-08-13 | 2015-11-18 | 北方民族大学 | Air heat accumulating and releasing device of solid particles |
| CN109883221A (en) * | 2019-02-25 | 2019-06-14 | 中国科学院广州能源研究所 | A kind of compressed air hold over system |
| CN109945709A (en) * | 2019-02-25 | 2019-06-28 | 中国科学院广州能源研究所 | A kind of high pressure packed bed accumulation of heat/device for cooling |
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Application publication date: 20200218 |
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