CN213811898U - Spiral gradually-changed fin phase-change heat accumulator - Google Patents
Spiral gradually-changed fin phase-change heat accumulator Download PDFInfo
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- CN213811898U CN213811898U CN202022641931.3U CN202022641931U CN213811898U CN 213811898 U CN213811898 U CN 213811898U CN 202022641931 U CN202022641931 U CN 202022641931U CN 213811898 U CN213811898 U CN 213811898U
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- heat
- end surface
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- heat exchange
- fluid outlet
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- 239000012530 fluid Substances 0.000 claims abstract description 63
- 239000012782 phase change material Substances 0.000 claims abstract description 30
- 238000005338 heat storage Methods 0.000 claims abstract description 15
- 238000009825 accumulation Methods 0.000 claims abstract description 8
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 3
- 229930195729 fatty acid Natural products 0.000 claims description 3
- 239000000194 fatty acid Substances 0.000 claims description 3
- 150000004665 fatty acids Chemical class 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 19
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000013021 overheating Methods 0.000 abstract 1
- 238000012546 transfer Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000013529 heat transfer fluid Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model belongs to the phase change heat accumulation field especially relates to a spiral gradual change fin phase change heat accumulator, mainly includes: the heat-accumulating type heat-accumulating heat-exchanging tube comprises an upper end surface (1), a heat-accumulating shell (2), spiral fins (3), a heat-exchanging tube bundle (4), a phase-change material (5), a lower end surface (6), a hot fluid inlet pipe (7), a cold fluid outlet pipe (8), a hot fluid outlet pipe (9) and a cold fluid inlet pipe (10); the heat exchange tube bundles (4) are positioned between the upper end surface and the lower end surface, are connected in parallel and are vertically arranged at equal intervals; spiral fins (3) are arranged between the heat exchange tube bundle (4) and the heat storage shell (2), and fins of each stage are connected with all heat exchange tubes to form a closed channel. The heat accumulator has the advantages that the interval of the fins is gradually changed, and the interval of the heat exchange fluid outlet is smaller as the heat accumulator is closer to the heat exchange fluid outlet, so that the heat exchange temperature difference of the heat accumulator tends to be consistent, the utilization rate of the phase change material is improved, and the phenomenon of local overheating is reduced. The phase change heat accumulator can efficiently store and release heat for regional heating.
Description
Technical Field
The utility model relates to a phase change heat accumulation field especially relates to a spiral gradual change fin phase change heat accumulator.
Background
With social progress and rapid economic development, the consumption demand of energy products is rapidly increased, and the research topics of energy sources become by saving energy sources, searching for alternative energy sources and improving the use efficiency of the energy sources. The research of the heat storage technology can realize the complementation and the comprehensive utilization of multiple energies and solve the problem of unbalanced energy supply and demand. The phase change heat storage has the advantages of large heat storage capacity per unit mass, good chemical stability, reusability of phase change materials, good safety and the like, and is widely concerned, wherein the design of the heat storage device is the key point of research.
Common spiral fin formula phase change heat accumulator is equidistant fin, and at the actual heat transfer in-process, because heat transfer fluid and phase change material's the difference in temperature is more and more littleer along with the increase of heat transfer time, the phase change material of entry is overheated easily, and the phase change material of export can't effectively carry out the heat transfer, and the phase change material low-usage, the heat waste is serious, can lead to the heat accumulator bulk temperature uneven moreover, reduces the life of heat accumulator.
Disclosure of Invention
In order to overcome current phase change heat accumulator phase change material heat utilization rate low and the heat transfer difference in temperature is big, the uneven scheduling problem of bulk temperature, the utility model provides a spiral gradual change fin phase change heat accumulator, spiral fin (3) are the interval gradual change formula, and it is big more to be close to hot-fluid import pipe (7) interval more, and it is more little more to be close to hot-fluid outlet pipe (9) interval, increases heat exchange efficiency, makes the heat accumulator heat transfer difference in temperature tend to unanimity, reduces the local overheated phenomenon of phase change material, improves heat accumulator life.
The utility model discloses a realize through following technical scheme:
the utility model provides a spiral gradual change fin phase transition heat accumulator which characterized in that includes: the heat-accumulating type heat-accumulating heat-exchanging tube comprises an upper end surface (1), a heat-accumulating shell (2), spiral fins (3), a heat-exchanging tube bundle (4), a phase-change material (5), a lower end surface (6), a hot fluid inlet pipe (7), a cold fluid outlet pipe (8), a hot fluid outlet pipe (9) and a cold fluid inlet pipe (10); the two ends of the heat storage shell (2) are respectively welded with the upper end surface (1) and the lower end surface (6), the hot fluid inlet pipe (7) and the cold fluid outlet pipe (8) are positioned on the lower end surface (2), and the hot fluid outlet pipe (9) and the cold fluid inlet pipe (10) are positioned on the upper end surface (1); the heat exchange tube bundles (4) are positioned between the upper end surface and the lower end surface, are connected in parallel and are vertically arranged at equal intervals; spiral fins (3) are arranged between the heat exchange tube bundle (4) and the heat storage shell (2), and each level of fins are connected with all heat exchange tubes to form a closed channel; the remaining space stores the phase change material (5). The distance between the spiral fins (3) is gradually changed, the closer to the hot fluid inlet pipe (7), the larger the distance, and the closer to the hot fluid outlet pipe (9), the smaller the distance. The connector parts of the spiral fins (3) and the heat exchange tube bundles (4) are round through holes, the diameters of the spiral fins and the heat exchange tube bundles (4) are in interference fit, and the number of the spiral fins and the number of the heat exchange tubes are consistent. Valves are arranged on the hot fluid inlet pipe (7), the cold fluid outlet pipe (8), the hot fluid outlet pipe (9) and the cold fluid inlet pipe (10) to control the flow direction of the cold and hot fluid. And a heat insulation material is arranged outside the heat storage shell (2). The phase-change material (5) is crystalline hydrated salt, paraffin or fatty acid phase-change material.
The utility model has the advantages of showing and positive effect.
The utility model discloses simple structure is easy, and the existence of fin can increase heat transfer area, is favorable to the heat transfer. The fin of interval gradual change can reduce the overheated phenomenon of entrance phase change material, increases exit phase change material's melting degree, improves phase change material's utilization ratio, reduces the heat waste, can make the heat accumulator heat transfer difference in temperature tend to unanimity simultaneously, and overall temperature distributes more evenly, reduces local overheated phenomenon, improves whole heat accumulation effect.
Drawings
Fig. 1 is the utility model discloses a spiral gradual change fin phase change heat accumulator structure sketch map.
Fig. 2 is a fin schematic diagram of the spiral gradually-changed fin phase change heat accumulator of the utility model.
In the figure, 1-upper end face, 2-heat storage shell, 3-spiral fin, 4-heat exchange tube bundle, 5-phase change material, 6-lower end face, 7-hot fluid inlet pipe, 8-cold fluid outlet pipe, 9-hot fluid outlet pipe and 10-cold fluid inlet pipe.
Detailed Description
For a better understanding of the present invention, reference is made to the following further description taken in conjunction with the accompanying drawings.
As shown in fig. 1, a spiral gradually-changed fin phase change heat accumulator mainly includes: the heat-accumulating type heat-accumulating heat-exchanging tube comprises an upper end surface (1), a heat-accumulating shell (2), spiral fins (3), a heat-exchanging tube bundle (4), a phase-change material (5), a lower end surface (6), a hot fluid inlet pipe (7), a cold fluid outlet pipe (8), a hot fluid outlet pipe (9) and a cold fluid inlet pipe (10); the two ends of the heat storage shell (2) are respectively welded with the upper end surface (1) and the lower end surface (6), the hot fluid inlet pipe (7) and the cold fluid outlet pipe (8) are positioned on the lower end surface (2), and the hot fluid outlet pipe (9) and the cold fluid inlet pipe (10) are positioned on the upper end surface (1); the heat exchange tube bundles (4) are positioned between the upper end surface and the lower end surface, are connected in parallel and are vertically arranged at equal intervals; spiral fins (3) are arranged between the heat exchange tube bundles (4) and the heat storage shell (2), and each level of fins are connected with all the heat exchange tube bundles to form a closed channel; the remaining space stores the phase change material (5). The distance between the spiral fins (3) is gradually changed, the closer to the hot fluid inlet pipe (7), the larger the distance, and the closer to the hot fluid outlet pipe (9), the smaller the distance. The connector parts of the spiral fins (3) and the heat exchange tube bundles (4) are round through holes, the diameters of the spiral fins and the heat exchange tube bundles (4) are in interference fit, and the number of the spiral fins and the number of the heat exchange tubes are consistent. Valves are arranged on the hot fluid inlet pipe (7), the cold fluid outlet pipe (8), the hot fluid outlet pipe (9) and the cold fluid inlet pipe (10) to control the flow direction of the cold and hot fluid. And a heat insulation material is arranged outside the heat storage shell (2). The phase-change material (5) is crystalline hydrated salt, paraffin or fatty acid phase-change material.
When melting the heat accumulation, the hot-fluid inlet pipe (7) entering heat exchanger tube bank (4) of high temperature hot-fluid via terminal surface (6) down, evenly distribute each unit pipe in, the heat passes through heat exchanger tube bank (4) and spiral fin (3) transmission for phase change material (5) by the hot-fluid of high temperature, phase change material (5) melt and carry out the heat accumulation, along the hot-fluid flow direction, the heat transfer difference in temperature constantly reduces, in order to alleviate this problem, the interval of spiral fin (3) constantly reduces, thereby make holistic heat transfer difference in temperature more even, the heat transfer effect of heat accumulator has been improved, the heat accumulator finally flows out from hot-fluid outlet pipe (9) after the high temperature hot-fluid is exothermic, the heat accumulation process is accomplished.
When solidification is exothermic, low temperature cold flow body gets into heat exchanger tube bank (4) via cold flow body import (10) of up end (1), evenly distribute each unit pipe in, the heat is given for low temperature cold flow body through spiral fin (3) and heat exchanger tube bank (4) by high temperature phase change material (5), phase change material (5) solidify and release heat, the existence of natural convection can obstruct the solidification process, spiral fin (3) separate into a plurality of different independent regions with phase change material (5), natural convection has been reduced, thereby the solidification process has been strengthened, flow out the heat accumulator from cold flow body export (8) after low temperature cold flow body absorbs heat at last, the heat release process is accomplished.
Claims (6)
1. A spiral gradually-changed fin phase-change heat accumulator is characterized by comprising an upper end surface (1), a heat accumulation shell (2), spiral fins (3), a heat exchange tube bundle (4), a phase-change material (5), a lower end surface (6), a hot fluid inlet pipe (7), a cold fluid outlet pipe (8), a hot fluid outlet pipe (9) and a cold fluid inlet pipe (10); the heat storage shell (2) is characterized in that the upper end surface (1) and the lower end surface (6) are respectively welded at two ends of the heat storage shell, a hot fluid inlet pipe (7) and a cold fluid outlet pipe (8) are positioned on the lower end surface (6), and a hot fluid outlet pipe (9) and a cold fluid inlet pipe (10) are positioned on the upper end surface (1); the heat exchange tube bundles (4) are positioned between the upper end surface and the lower end surface, are connected in parallel and are vertically arranged at equal intervals; spiral fins (3) are arranged between the heat exchange tube bundle (4) and the heat storage shell (2), and each level of fins are connected with all heat exchange tubes to form a closed channel; the remaining space stores the phase change material (5).
2. The spiral-graded fin phase-change heat accumulator according to claim 1, characterized in that the spiral fins (3) are gradually spaced, the closer to the hot fluid inlet pipe (7) the larger the spacing, the closer to the hot fluid outlet pipe (9) the smaller the spacing.
3. The spiral gradually-changed fin phase-change heat accumulator according to claim 1, wherein the interface parts of the spiral fins (3) and the heat exchange tube bundle (4) are circular through holes, the diameter of the interface parts is in interference fit with the heat exchange tube bundle (4), and the number of the interface parts is consistent with the number of the heat exchange tubes.
4. The spiral gradually-changed fin phase-change heat accumulator according to claim 1, wherein valves are arranged on the hot fluid inlet pipe (7), the cold fluid outlet pipe (8), the hot fluid outlet pipe (9) and the cold fluid inlet pipe (10) to control the flow direction of cold and hot fluids.
5. The spiral gradually-changed fin phase-change heat accumulator as claimed in claim 1, characterized in that a thermal insulation material is arranged outside the heat accumulation shell (2).
6. The spiral-gradient-fin phase-change heat accumulator as claimed in claim 1, characterized in that the phase-change material (5) is a crystalline hydrated salt, or a paraffin, or a fatty acid-based phase-change material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022641931.3U CN213811898U (en) | 2020-11-16 | 2020-11-16 | Spiral gradually-changed fin phase-change heat accumulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022641931.3U CN213811898U (en) | 2020-11-16 | 2020-11-16 | Spiral gradually-changed fin phase-change heat accumulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213811898U true CN213811898U (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022641931.3U Expired - Fee Related CN213811898U (en) | 2020-11-16 | 2020-11-16 | Spiral gradually-changed fin phase-change heat accumulator |
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| Country | Link |
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| CN (1) | CN213811898U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115247893A (en) * | 2022-07-27 | 2022-10-28 | 中国科学院电工研究所 | Electromagnetic induction heating-heat storage-heat extraction integrated device |
-
2020
- 2020-11-16 CN CN202022641931.3U patent/CN213811898U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115247893A (en) * | 2022-07-27 | 2022-10-28 | 中国科学院电工研究所 | Electromagnetic induction heating-heat storage-heat extraction integrated device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210727 |
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| CF01 | Termination of patent right due to non-payment of annual fee |