CN104864757A - Cylindrical structure gradual-change fin phase change heat accumulator - Google Patents
Cylindrical structure gradual-change fin phase change heat accumulator Download PDFInfo
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- CN104864757A CN104864757A CN201510303521.9A CN201510303521A CN104864757A CN 104864757 A CN104864757 A CN 104864757A CN 201510303521 A CN201510303521 A CN 201510303521A CN 104864757 A CN104864757 A CN 104864757A
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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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Abstract
The invention belongs to the technical field of heat accumulation, and particularly relates to a cylindrical structure gradual-change fin phase change heat accumulator. The heat accumulator comprises an upper end face (1), a heat accumulation shell (2), annular fins (3), heat exchange pipe bundles (4), a phase change material (5) and a bottom face (6). The heat exchange pipe bundles are vertically arranged between the upper end face and the lower end face in a peripheral array mode and are arranged at equal intervals in parallel. The annular fins are parallel to the upper end face and the lower end face and horizontally arranged between the upper end face and the lower end face, each level of annular fins is connected with all the heat exchange pipe bundles to form a sealed channel, and heat exchange fluid flows in the channel. The heat accumulation shell wraps a cylindrical space between the upper end face and the bottom face, and the phase change material is stored in the cylindrical space. The intervals of the annular fins are changed gradually, the more the annular fins are close to the bottom face, the intervals are smaller, the heat exchange temperature difference of the heat accumulator more tends to be consistent, and the phenomena that the phase change material is partially excessively hot, and the heat stress of a heat accumulation container is excessively high are reduced.
Description
Technical field
The invention belongs to heat storage technology field, particularly relate to a kind of column type structure gradual change fin phase change heat accumulator.
Background technology
Along with the exhaustion of fossil fuel and the deterioration of natural environment, the alternative energy source finding sustainable development has become the significant problem of many countries concern.Research sensible heat, latent heat and chemical reaction heat storage technology can reduce the mismatch problem between intermittent energy supply and demand.Latent-heat storage has that performance is good, reliability is high, storage density is large and the advantage such as almost constant heat-exchange temperature, but the lower thermal conductivity of phase-change material limits the development of latent-heat storage technology.
During heat-accumulating process, due to along high temperature heat exchanging fluid flow direction, heat exchanging fluid and phase-change material heat transfer temperature difference more and more less, cause the phase-change material of entrance easily overheated, the phase-change material of outlet section can not effectively melt.Traditional equidistant fin storage heater phase-change material overall utilization rate is low, and phase-change material can not melt completely and solidifies and participate in heat exchange in heat transfer process, and consequent temperature and thermal stress inequality distribute, and decrease the life-span of phase-change material and container material.
Summary of the invention
Low for phase change heat accumulator phase-change material thermal conductivity, utilization rate is low and square heat storage container localized heat stress crosses the problems such as high, propose a kind of column type structure gradual change fin phase change heat accumulator, comprising: upper surface, accumulation of heat housing, ring fin, heat-exchanging tube bundle, phase-change material, bottom surface; Storage heater overall structure is cylinder, vertically arranges; Adopt circumference array mode vertically to arrange many heat-exchanging tube bundles between upper surface and bottom surface, heat-exchanging tube bundle is equidistantly parallel to each other; Multiple ring fin is parallel to upper surface and bottom surface, and horizontally disposed between upper surface and bottom surface, and the ring fin of every one-level is connected with all heat-exchanging tube bundles, forms closed channel, the inside fluid interchange fluid; Cylindrical space between upper surface and bottom surface wraps up by accumulation of heat housing, removes its complementary space that ring fin and heat-exchanging tube bundle formed outside closed channel and store phase-change material in the cylindrical space formed.
The spacing gradual change of described ring fin, the ring fin spacing the closer to upper surface is larger, and the ring fin spacing the closer to bottom surface is less, and spacing of fin Variable rate to distribute corresponding layout vertically according to temperature and heat exchange amount.
Described ring fin is divided into tube bank interface section and fin entity part, and tube bank interface section is manhole, and diameter coordinates with heat-exchanging tube bundle; Circumferentially array equidistant placement is on ring fin in tube bank interface section, and concrete quantity is determined according to the concrete heat exchange parameter of storage heater.
Heat exchanging fluid entrance is equipped with in described upper surface, and heat exchanging fluid outlet is equipped with in described bottom surface.
Described accumulation of heat housing comprises liner, high temperature alloy, heat insulation layer; Liner is carbon-silicon compound, and multilayer carbon-silicon compound uses carbon silica fibre to be connected with middle high temperature alloy, and heat insulation layer adopts multilayer insulation material and vacuum insulation.
Described phase-change material selects simple salt or salt-mixture as phase-change material, and comprise main heat-storage agent, anti-phase separation agent, the anti-composition crossing cryogen, phase transition temperature conditioning agent, phase transformation promoter, melting temperature is not less than 300 DEG C.
The material of described heat-exchanging tube bundle is high-temperature stability alloy, comprises and bores base, Ni-based.
The invention has the beneficial effects as follows: a kind of column type structure of the present invention gradual change fin phase change heat accumulator, utilizes phase-change material to coordinate heat exchanging fluid to design and mate good phase change heat accumulator with heat-exchange temperature.Spacing gradual change fin can reduce the superheating phenomenon of entrance phase-change material, the fusing of the section of increasing export phase-change material, improves the overall accumulation of heat effect of phase-change material.Spacing of fin degree more mates heat transfer temperature difference, fin unit bulk temperature distribution more even, accumulation amount of stored heat and internal face heat flow density also higher, phase-change material overall utilization rate is higher.Fin can hinder the formation of free convection, is conducive to process of setting.By the overall ring-type fin of arrangement pitch gradual change, make storage heater heat transfer temperature difference more aligned, reduce phase-change material hot-spot and the too high phenomenon of heat storage container thermal stress.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of column type structure gradual change fin phase change heat accumulator of the present invention
Fig. 2 is storage heater front view
Fig. 3 is ring fin structure chart
Wherein, 1-upper surface, 2-accumulation of heat housing, 3-ring fin, 4-heat-exchanging tube bundle, 5-intersect material, 6-bottom surface, 7-heat exchanging fluid entrance, the outlet of 8-heat exchanging fluid, 301-tube bank interface section, 302-fin entity part.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment is elaborated.
As shown in Figure 1, the present invention is by upper surface 1, and accumulation of heat housing 2, ring fin 3, heat-exchanging tube bundle 4, phase-change material 5, bottom surface 6 forms.Storage heater overall structure is cylinder, vertically arranges.Ring fin 3 is horizontally disposed, and the ring fin 3 of every one-level is an entirety, according to the interface of accumulation of heat specific requirement equidistant placement heat-exchanging tube bundle 4.The vertical equidistant layout parallel to each other of heat-exchanging tube bundle 4.Fluid interchange fluid in heat-exchanging tube bundle 4.Store phase-change material 5 between ring fin 3, ring fin 3 reduces direction spacing of fin along heat-accumulating process heat transfer temperature difference and constantly reduces.Heat exchanging fluid is by ring fin 3 and heat-exchanging tube bundle 4 and phase-change material 5 heat exchange.Every two adjacent fins by between phase-change material be separated into independent heat exchange area.
Described phase-change material needs suitable phase transition temperature, and higher specific heat and latent heat are to reduce the size of thermal storage unit, phase-change material must show congruent melting to reduce irreversible periodic loss simultaneously, select chemically stable phase-change material to extend the life-span of thermal storage unit, need security and the economy of considering phase-change material in addition.
Described ring fin selects the material that thermal conductivity is higher.The direction that spacing of fin reduces along with heat-accumulating process heat transfer temperature difference constantly reduces, and the distribution of the spacing degree coupling temperature difference, heat-exchanging tube bundle is perpendicular through fin, and the heat exchanging fluid in heat-exchanging tube bundle is by tube bank surface and fin surface and phase-change material heat exchange.Simultaneously fin can stop overall free convection solidifying exothermic process, slows down free convection to the impact of solidifying exothermic process.
As shown in Figure 2, heat exchanging fluid entrance 7 is on upper surface 1, and heat exchanging fluid outlet 8 is on bottom surface 6.
As shown in Figure 3, ring fin 3 is divided into tube bank interface section 301 and fin entity part 302, and tube bank interface section 301 is manholes, and diameter coordinates with heat-exchanging tube bundle 4.Circumferentially array equidistant placement is on ring fin 3 in tube bank interface section 301, and concrete quantity is determined according to the concrete heat exchange parameter of storage heater.
Fusing heat-accumulating process, the heat exchanging fluid of high temperature enters into heat-exchanging tube bundle 4 by the heat exchanging fluid entrance 7 of upper surface 1, and flow is evenly distributed to each heat exchange unit pipe.The heat exchanging fluid of high temperature carries out heat transfer heat exchange by ring fin 3 and heat-exchanging tube bundle 4 with the phase-change material 5 of low temperature.Along high temperature heat exchanging fluid flow direction, the heat transfer temperature difference of high temperature heat exchanging fluid and low-temperature phase-change material 5 constantly reduces, and for improving storage heater overall heat exchange effect, ring fin 3 spacing constantly reduces along this direction.Final heat exchanging fluid exports 8 by the heat exchanging fluid of bottom surface 6 and flows out storage heater, completes a heat transfer process.
Solidify exothermic process, the heat exchanging fluid of low temperature flows into storage heater by the heat exchanging fluid outlet 8 of bottom surface 6, flow is evenly distributed to each heat exchange unit pipe of heat exchange, the phase-change material 5 of high temperature mainly carries out heat transfer heat exchange by ring fin 3 and heat-exchanging tube bundle 4 with the heat exchanging fluid of low temperature, and the fluid after heat exchange flows out storage heater by the heat exchanging fluid entrance 7 of upper surface 1.The existence of free convection can slow down process of setting, but stops overall free convection because phase-change material is separated into independent heat exchange area different on vertical direction by multiple ring fin 3, can strengthen process of setting to a certain extent.
This embodiment is only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (7)
1. a column type structure gradual change fin phase change heat accumulator, is characterized in that, comprising: upper surface, accumulation of heat housing, ring fin, heat-exchanging tube bundle, phase-change material, bottom surface; Storage heater overall structure is cylinder, vertically arranges; Adopt circumference array mode vertically to arrange many heat-exchanging tube bundles between upper surface and bottom surface, heat-exchanging tube bundle is equidistantly parallel to each other; Multiple ring fin is parallel to upper surface and bottom surface, and horizontally disposed between upper surface and bottom surface, and the ring fin of every one-level is connected with all heat-exchanging tube bundles, forms closed channel, the inside fluid interchange fluid; Cylindrical space between upper surface and bottom surface wraps up by accumulation of heat housing, removes its complementary space that ring fin and heat-exchanging tube bundle formed outside closed channel and store phase-change material in the cylindrical space formed.
2. storage heater according to claim 1, it is characterized in that, the spacing gradual change of described ring fin, the ring fin spacing the closer to upper surface is larger, ring fin spacing the closer to bottom surface is less, and spacing of fin Variable rate to distribute corresponding layout vertically according to temperature and heat exchange amount.
3. storage heater according to claim 1, is characterized in that, described ring fin is divided into tube bank interface section and fin entity part, and restraining interface section is manhole, and diameter coordinates with heat-exchanging tube bundle; Circumferentially array equidistant placement is on ring fin in tube bank interface section, and concrete quantity is determined according to the concrete heat exchange parameter of storage heater.
4. storage heater according to claim 1, it is characterized in that, heat exchanging fluid entrance is equipped with in described upper surface, and heat exchanging fluid outlet is equipped with in described bottom surface.
5. storage heater according to claim 1, it is characterized in that, described accumulation of heat housing comprises liner, high temperature alloy, heat insulation layer; Liner is carbon-silicon compound, and multilayer carbon-silicon compound uses carbon silica fibre to be connected with middle high temperature alloy, and heat insulation layer adopts multilayer insulation material and vacuum insulation.
6. storage heater according to claim 1, it is characterized in that, described phase-change material selects simple salt or salt-mixture as phase-change material, and comprise main heat-storage agent, anti-phase separation agent, the anti-composition crossing cryogen, phase transition temperature conditioning agent, phase transformation promoter, melting temperature is not less than 300 DEG C.
7. storage heater according to claim 1, it is characterized in that, the material of described heat-exchanging tube bundle is high-temperature stability alloy, comprises and bores base, Ni-based.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510303521.9A CN104864757B (en) | 2015-06-04 | 2015-06-04 | A kind of column type structure gradual change fin phase change heat accumulator |
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| CN201510303521.9A CN104864757B (en) | 2015-06-04 | 2015-06-04 | A kind of column type structure gradual change fin phase change heat accumulator |
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| CN104864757A true CN104864757A (en) | 2015-08-26 |
| CN104864757B CN104864757B (en) | 2017-10-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654930A (en) * | 2018-12-05 | 2019-04-19 | 南京工业大学 | A kind of vertical layering phase transition heat accumulation unit based on special-shaped fin |
| CN110108143A (en) * | 2019-04-12 | 2019-08-09 | 中国大唐集团新能源科学技术研究院有限公司 | A kind of phase change heat accumulator |
| CN110285701A (en) * | 2019-06-12 | 2019-09-27 | 上海理工大学 | Gradual change grid phase change heat accumulator |
| CN111076593A (en) * | 2019-12-13 | 2020-04-28 | 西安交通大学 | Annular fin type efficient heat storage reactor based on metal hydride |
| CN115854764A (en) * | 2022-11-08 | 2023-03-28 | 哈尔滨工业大学 | Integrated finned tube phase-change heat storage heat exchanger |
Citations (5)
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| CN1737470A (en) * | 2005-07-21 | 2006-02-22 | 上海交通大学 | Ribbed pipe type evaporator |
| CN201126323Y (en) * | 2007-08-20 | 2008-10-01 | 高秀明 | Phase transition energy storage tank |
| CN201945225U (en) * | 2010-12-20 | 2011-08-24 | 许益凡 | Phase change heat accumulator with spiral thread elastic tube bundle |
| CN102410768A (en) * | 2011-10-25 | 2012-04-11 | 华南理工大学 | Phase change heat accumulator used for defrosting heat pump water heater |
| CN203928809U (en) * | 2014-06-04 | 2014-11-05 | 无锡杰尔压缩机有限公司 | Unequal-interval Gilled heat exchanger |
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2015
- 2015-06-04 CN CN201510303521.9A patent/CN104864757B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1737470A (en) * | 2005-07-21 | 2006-02-22 | 上海交通大学 | Ribbed pipe type evaporator |
| CN201126323Y (en) * | 2007-08-20 | 2008-10-01 | 高秀明 | Phase transition energy storage tank |
| CN201945225U (en) * | 2010-12-20 | 2011-08-24 | 许益凡 | Phase change heat accumulator with spiral thread elastic tube bundle |
| CN102410768A (en) * | 2011-10-25 | 2012-04-11 | 华南理工大学 | Phase change heat accumulator used for defrosting heat pump water heater |
| CN203928809U (en) * | 2014-06-04 | 2014-11-05 | 无锡杰尔压缩机有限公司 | Unequal-interval Gilled heat exchanger |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654930A (en) * | 2018-12-05 | 2019-04-19 | 南京工业大学 | A kind of vertical layering phase transition heat accumulation unit based on special-shaped fin |
| CN110108143A (en) * | 2019-04-12 | 2019-08-09 | 中国大唐集团新能源科学技术研究院有限公司 | A kind of phase change heat accumulator |
| CN110285701A (en) * | 2019-06-12 | 2019-09-27 | 上海理工大学 | Gradual change grid phase change heat accumulator |
| CN111076593A (en) * | 2019-12-13 | 2020-04-28 | 西安交通大学 | Annular fin type efficient heat storage reactor based on metal hydride |
| CN115854764A (en) * | 2022-11-08 | 2023-03-28 | 哈尔滨工业大学 | Integrated finned tube phase-change heat storage heat exchanger |
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| CN104864757B (en) | 2017-10-10 |
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Granted publication date: 20171010 Termination date: 20180604 |