CN108954870B - Solar high-temperature energy storage and heat exchange heat absorber - Google Patents
Solar high-temperature energy storage and heat exchange heat absorber Download PDFInfo
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- CN108954870B CN108954870B CN201810387311.6A CN201810387311A CN108954870B CN 108954870 B CN108954870 B CN 108954870B CN 201810387311 A CN201810387311 A CN 201810387311A CN 108954870 B CN108954870 B CN 108954870B
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- heat
- heat absorption
- convex hull
- absorption cylinder
- energy storage
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- 238000004146 energy storage Methods 0.000 title claims abstract description 22
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims abstract description 42
- 238000005338 heat storage Methods 0.000 claims abstract description 6
- 230000008859 change Effects 0.000 claims abstract description 4
- 239000011232 storage material Substances 0.000 claims abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 claims description 2
- 239000012782 phase change material Substances 0.000 description 8
- 230000006872 improvement Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Photovoltaic Devices (AREA)
Abstract
The invention discloses a solar high-temperature energy storage and heat exchange heat absorber which comprises a heat absorption cylinder, wherein one end of the heat absorption cylinder is closed, the other end of the heat absorption cylinder is provided with a sunlight gathering inlet, convex hull heat accumulators are uniformly distributed on the inner wall and the outer wall of the heat absorption cylinder and comprise convex hull shells fixed on the heat absorption cylinder, and phase change heat storage materials are stored in a closed cavity formed by the convex hull shells and the heat absorption cylinder; the outer side of the heat absorption cylinder is provided with a working medium heat absorption channel, and the working medium heat absorption channel is connected with a working medium inlet and a working medium outlet.
Description
Technical Field
The invention belongs to the field of solar high-temperature heat absorption equipment, and particularly relates to a solar high-temperature energy storage and heat exchange heat absorber.
Background
The solar heat absorber with the high-temperature energy storage and heat exchange composite structure is an important way for improving the compactness of a system, reducing the quality of the system, reducing the technical cost and promoting the technical development of new energy and spacecraft.
In the process of space solar high-temperature application (thermal propulsion or thermal power generation), an energy storage system needs to be configured to meet the requirement of acting in a track shadow area. Then, limited by the mass of the spacecraft, the solar heat absorption and heat storage (energy) device is preferably designed in an integrated manner, so that the mass of the system is reduced, and the cost is reduced. The key technical problems of heat transfer science exist in solar high-temperature heat storage and gasification enhanced heat exchange, and meanwhile, the problems are mutually coupled with the density distribution characteristic of the concentrated solar heat flow, so that the design scheme of the solar high-temperature energy storage and heat exchange heat absorber is very complex.
The existing solar heat absorption or energy storage device is designed and analyzed only from a certain aspect of solar high-temperature energy storage or high-efficiency heat conversion, and on the basis of not fully considering the distribution characteristic of concentrated solar heat flow density, a solar high-temperature energy storage and energy storage unit and a gas working medium are unified for heat exchange enhancement, so that the applicability of a solar high-temperature heat conversion technology is restricted.
Disclosure of Invention
On the basis of understanding the distribution characteristics of the concentrated solar heat flow density, the invention fully considers the related technical problems of solar high-temperature heat storage and gas enhanced heat exchange, designs a solar high-temperature energy storage and heat exchange composite structure heat absorber with a cylinder and convex hull coupling structure, and provides reference for the technical progress of high-temperature and high-efficiency utilization of solar energy.
The invention is realized by the following technical scheme:
a solar high-temperature energy storage and heat exchange heat absorber comprises a heat absorption cylinder, and is characterized in that one end of the heat absorption cylinder is closed, the other end of the heat absorption cylinder is provided with a sunlight gathering inlet, convex hull heat accumulators are uniformly distributed on the inner wall and the outer wall of the heat absorption cylinder, each convex hull heat accumulator comprises a convex hull fixed on the heat absorption cylinder, and a phase change heat accumulation material is stored in a closed cavity formed by the convex hull and the heat absorption cylinder;
the outer side of the heat absorption cylinder is provided with a working medium heat absorption channel, and the working medium heat absorption channel is connected with a working medium inlet and a working medium outlet.
In a further improvement, in a peak area of concentrated solar heat flow density distribution on the heat absorption cylinder, the diameter of the convex hull heat reservoir is increased and the distance between adjacent convex hull heat reservoirs is reduced.
In a further improvement, the radius of the sunlight gathering inlet of the heat absorption cylinder is the same as the radius of the sunlight gathering spot.
The solar heat collector is further improved, the radius of the heat absorption cylinder is 2-3 times of the radius of a sunlight gathering inlet, and the height of the heat absorption cylinder is 5-8 times of the radius of the sunlight gathering inlet.
In a further improvement, the convex hull is semi-ellipsoidal, and the equivalent radius is 0.1-0.2 times of the radius of the sunlight gathering inlet.
In a further improvement, the convex hull is welded or screwed with the cylinder wall, and the material of the convex hull is silicon carbide or alumina ceramic material or high-melting-point metal material
In a further improvement, the phase-change heat storage material is copper, aluminum or silicon.
Compared with the prior art, the invention has the following advantages:
1) the number of the semi-ellipsoidal convex hulls is large, and each convex hull has an independent shell area, so that the phase change material is large in heating area and has a good energy storage and heat release effect;
2) in the working medium heating channel, the total area of the convex hull shell which carries out heat convection with the working medium is large. Meanwhile, concave-convex curved surfaces are formed between the convex hulls and the cylinder wall, so that the disturbance of the working medium and the heat absorption wall surface is enhanced, and the high-temperature convection heat absorption effect of the working medium is enhanced;
3) because the convex hulls are relatively independent, the high-temperature thermal stress is small, the stability of the system is good, the maintenance is convenient, and the operability is good.
Drawings
FIG. 1 is a schematic view of example 1.
Detailed Description
In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention comprehensible, the present invention is further explained with reference to examples, and it should be noted that all examples listed herein are only illustrative and are not meant to limit the scope of the present invention.
Example 1:
as shown in figure 1, the invention provides a solar high-temperature energy storage and heat exchange heat absorber with a cylinder and convex hull coupling structure, which comprises a heat absorption cylinder with a sunlight gathering inlet, and a working medium heat absorption channel, wherein a plurality of energy storage convex hulls are distributed on the inner side (sunlight gathering irradiation side) and the outer side (working medium channel side) of the cylinder wall. The convex hull is semi-ellipsoidal, the convex hull is connected with the cylinder wall, and the phase change material is fully stored in the closed cavity formed by the convex hull and the cylinder wall.
In the peak area of the concentrated solar heat flow density distribution, the diameter of the convex hull is increased, the distance is reduced, and more concentrated solar energy is absorbed.
The working principle is that the concentrated sunlight enters the cylindrical heat absorber and is absorbed by the wall surface of the cylinder, and the temperature is increased. Then the high-temperature cylinder wall simultaneously heats the phase-change material and the convex hull in the convex hull closed cavity. Because the temperature of the convex hull body rises quickly, the high-temperature convex hull body also heats the phase-change material in the convex hull closed cavity. The phase-change material absorbs the heat of the cylinder wall and the convex hull, the temperature rises to the melting point, and the phase-change material becomes liquid to store energy. Then, the working medium enters the heat absorption channel, and carries out heat convection with the convex hull shell and the cylinder wall, so as to absorb heat and raise temperature, and the working medium flows out at high temperature to do work. When the system enters the shadow area, the phase-change material emits heat, the cylinder wall and the convex hull are heated in turn, and the gas working medium is heated through the cylinder wall and the convex hull to complete work, so that the stable and continuous operation of the system is ensured.
The radius of a sunlight inlet of the cylinder is equal to that of a sunlight gathering spot, the radius of the cylinder is 2-3 times that of the sunlight inlet, and the height of the cylinder is 5-8 times that of the sunlight inlet. The convex hull is semi-ellipsoidal, and the equivalent radius is 0.1-0.2 times of the sunlight inlet radius. The convex hull shell is connected with the cylinder wall through welding or threads, the shell is made of ceramic materials such as silicon carbide and aluminum oxide or high-melting-point metal materials such as rhenium, molybdenum and tungsten, and the phase-change material can be selected from copper, aluminum or silicon.
Claims (6)
1. A solar high-temperature energy storage and heat exchange heat absorber comprises a heat absorption cylinder, and is characterized in that one end of the heat absorption cylinder is closed, the other end of the heat absorption cylinder is provided with a sunlight gathering inlet, convex hull heat accumulators are uniformly distributed on the inner wall and the outer wall of the heat absorption cylinder, each convex hull heat accumulator comprises a convex hull fixed on the heat absorption cylinder, and a phase change heat accumulation material is stored in a closed cavity formed by the convex hull and the heat absorption cylinder;
the outer side of the heat absorption cylinder is provided with a working medium heat absorption channel, and the working medium heat absorption channel is connected with a working medium inlet and a working medium outlet;
the radius of the heat absorption cylinder is 2-3 times of the radius of the sunlight gathering inlet, and the height of the heat absorption cylinder is 5-8 times of the radius of the sunlight gathering inlet.
2. A solar high temperature energy storage and heat exchange heat absorber according to claim 1, wherein the diameter of the convex hull heat reservoir is increased and the distance between adjacent convex hull heat reservoirs is reduced in the peak region of concentrated solar heat flow density distribution on the heat absorbing cylinder.
3. The solar high-temperature energy storage and heat exchange heat absorber of claim 1, wherein the radius of the sunlight gathering inlet of the heat absorption cylinder is the same as the radius of the sunlight gathering spot.
4. The solar high-temperature energy storage and heat exchange heat absorber of claim 1, wherein the convex hull is semi-ellipsoidal, and the equivalent radius is 0.1-0.2 times the radius of the entrance of the concentrated sunlight.
5. The solar high-temperature energy storage and heat exchange heat absorber of claim 1, wherein the convex hull is welded or screwed to the cylindrical wall, and the convex hull is made of silicon carbide or alumina ceramic material or high-melting-point metal material.
6. A solar high temperature energy storage and heat exchange heat absorber according to claim 1, wherein the phase change heat storage material is copper, aluminum or silicon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810387311.6A CN108954870B (en) | 2018-04-26 | 2018-04-26 | Solar high-temperature energy storage and heat exchange heat absorber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810387311.6A CN108954870B (en) | 2018-04-26 | 2018-04-26 | Solar high-temperature energy storage and heat exchange heat absorber |
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| Publication Number | Publication Date |
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| CN108954870A CN108954870A (en) | 2018-12-07 |
| CN108954870B true CN108954870B (en) | 2020-05-19 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539605A (en) * | 2018-12-14 | 2019-03-29 | 华南理工大学 | V-type heat absorption cavity type solar energy absorber with heat storage function |
| CN109823573B (en) * | 2019-01-22 | 2022-04-26 | 南京航空航天大学 | Heat storage-power generation-propulsion integrated solar thermal propulsion system |
| CN109798672A (en) * | 2019-01-31 | 2019-05-24 | 哈尔滨工业大学 | A kind of space solar high temperature photothermal conversion-energy storage-enhanced heat exchange integrated device |
| CN110210146B (en) * | 2019-06-06 | 2023-04-28 | 中国能源建设集团陕西省电力设计院有限公司 | System and method for determining optimal opening diameter of cavity type heat absorber |
| CN113531918A (en) * | 2021-05-25 | 2021-10-22 | 华电电力科学研究院有限公司 | Solar thermochemical energy storage system with power generation function and method |
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| CN2851981Y (en) * | 2005-11-28 | 2006-12-27 | 武彧 | Phase change heat storage device for solar water heater |
| CN2851982Y (en) * | 2005-12-06 | 2006-12-27 | 北京工业大学 | Double-medium solar high-temperature heat absorbing and storing device |
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| CN104534688A (en) * | 2014-12-26 | 2015-04-22 | 福建工程学院 | Two-stage solar heat absorber |
| CN204698343U (en) * | 2015-04-23 | 2015-10-14 | 上海交通大学 | Based on solar energy water-boiling kettle and the system of phase-change accumulation energy |
| CN204854437U (en) * | 2015-08-05 | 2015-12-09 | 南京星环能源科技有限公司 | Heat -retaining formula heat exchanger |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101398231B (en) * | 2008-07-09 | 2011-08-31 | 广东工业大学 | Solar thermal power generating multifunctional equipment with heat absorption, heat storage and vapor generation function |
| CN103940120B (en) * | 2014-05-12 | 2016-03-02 | 哈尔滨工业大学 | A kind of high temperature solar air heating apparatus |
| CN104075460A (en) * | 2014-07-01 | 2014-10-01 | 福建工程学院 | Solar heat absorber with novel optical window |
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- 2018-04-26 CN CN201810387311.6A patent/CN108954870B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2851981Y (en) * | 2005-11-28 | 2006-12-27 | 武彧 | Phase change heat storage device for solar water heater |
| CN2851982Y (en) * | 2005-12-06 | 2006-12-27 | 北京工业大学 | Double-medium solar high-temperature heat absorbing and storing device |
| CN101033892A (en) * | 2007-04-16 | 2007-09-12 | 中国科学院电工研究所 | High temperature heat absorber used in solar tower-type thermal power station |
| CN104534688A (en) * | 2014-12-26 | 2015-04-22 | 福建工程学院 | Two-stage solar heat absorber |
| CN204698343U (en) * | 2015-04-23 | 2015-10-14 | 上海交通大学 | Based on solar energy water-boiling kettle and the system of phase-change accumulation energy |
| CN204854437U (en) * | 2015-08-05 | 2015-12-09 | 南京星环能源科技有限公司 | Heat -retaining formula heat exchanger |
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