CN104930896A - Phase change heat storage device with interlayer heating - Google Patents
Phase change heat storage device with interlayer heating Download PDFInfo
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- CN104930896A CN104930896A CN201510312578.5A CN201510312578A CN104930896A CN 104930896 A CN104930896 A CN 104930896A CN 201510312578 A CN201510312578 A CN 201510312578A CN 104930896 A CN104930896 A CN 104930896A
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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 discloses a phase change heat storage device with interlayer heating. The phase change heat storage device comprises an inner shell body and an outer shell body; an interlayer forms between the inner shell body and the outer shell body; a phase change material cavity forms in the inner shell body, a direct type heat exchange conduction oil inlet and a direct type heat exchange conduction oil outlet are arranged on the shell body; an interlayer conduction oil inlet and an interlayer conduction oil outlet are arranged on the outer shell body. The phase change heat storage device combines a direct heat storage method with an indirect heat storage method; the conduction oil entering the device phase change cavity directly contacts and exchanges heat with the phase change material; the conduction oil flowing through the interlayer of the side wall indirectly exchanges heat with the phase change material through the inner shell body. Through the combination of the direct and indirect heat storage methods, the smelting rate of the heat storage process is further accelerated; meanwhile, a dead zone of the phase material smelting process is reduced utmost, and the maximum energy storage amount of the device is improved.
Description
Technical field
The present invention relates to renewable energy utilization and energy accumulating technique, be specifically related to the phase transition heat accumulation unit of a kind of sandwich heating.
Background technology
Along with socio-economic development, the consumption sharp increase of the energy, especially entered for 20th century, and the mankind can substitute the novel energy of conventional fossil fuel in the urgent need to finding.Solar energy, because the unlimitedness of its reserves and spatter property, is considered to a kind of new forms of energy having prospect, and in addition, industrial exhaust heat, also can as a kind of novel energy because its rich content.Especially middle low-temperature industrial waste heat and solar energy, the thermal source that can supply as heating and domestic hot-water, thus greatly alleviate current Pressure on Energy.But the unstability of solar energy and industrial waste heat resource, the problem of time, Space mismatching between thermal source and heat user, greatly governs its large-scale application.The generation of heat storage technology, solves above problem.And in various heat storage technology, phase-transition heat-storage, because its energy storage density is large, the advantages such as regenerator temperature near steady, become the research emphasis of heat storage technology.
The main Problems existing of current phase-transition heat-storage is, the thermal conductivity factor of phase-change material is too low, the heat transfer effect between heat transport fluid and phase-change material is not good, the extreme influence heat storage efficiency of storage heater.This is also the reason place that phase-transition heat-storage is difficult to large-scale application.In recent years, a kind of proposition of direct-type hold over system, advance the progress of phase-transition heat-storage greatly, different from traditional indirect type storage heater, in direct-type storage heater, conduction oil directly contacts with phase-change material, not only reduce the middle thermal resistance because partition causes, enhance convection heat transfer intensity simultaneously.But current direct-type accumulation of heat still also exists some problems: the phase-change material near storage heater sidewall is more infusibilized; The phase-change material of oil-in bottom is difficult to fusing, defines phase transformation dead band.
Summary of the invention
The present invention provides the phase transition heat accumulation unit that a kind of sandwich heat for solving in known technology the technical problem that exists, and this device can accelerate the fusing of side-walls phase-change material, eliminates the phase transformation dead band of oil-in bottom simultaneously, the overall accumulation of energy of raising storage heater.
The technical scheme that the present invention takes for the technical problem existed in solution known technology is: a kind of phase transition heat accumulation unit of sandwich heating, comprises inner housing and shell body, between described inner housing and described shell body, be formed with interlayer; In described inner housing, be formed with phase-change material cavity volume, described inner housing is provided with direct-type heat exchange heat conductive oil inlet and the outlet of direct-type heat exchange conduction oil; Described shell body is provided with interlayer heat conductive oil inlet and the outlet of interlayer conduction oil.
The inwall of described inner housing is provided with the heat-conducting fins being distributed in described phase-change material cavity volume inside.
It is inner that described direct-type heat exchange heat conductive oil inlet extends to described phase-change material cavity volume, is provided with protective cover at the head of described direct-type heat exchange heat conductive oil inlet.
Described direct-type heat exchange conduction oil outlet is positioned at the top of described inner housing.
Described interlayer heat conductive oil inlet is positioned at the bottom of described shell body, and described interlayer conduction oil outlet is positioned at the top of described shell body.
The advantage that the present invention has and good effect are:
One) mode of interlayer heating can accelerate the fusing of side-walls phase-change material, eliminates the phase transformation dead band of oil-in bottom simultaneously, improves the overall accumulation of energy of storage heater.
Two) direct-type heat exchange is carried out in inside, and side-wall outer side has conduction oil and phase-change material to carry out indirect type heat exchange, the mode be combined with indirect type accumulation of heat by direct-type, accelerates the fusing of phase-change material further, shortens thermal storage time, improves heat storage efficiency.
Three) at inner housing built with fin, increase the heat transfer area of interlayer conduction oil and phase-change material, efficient hardening heat exchange, make phase-change material interior temperature distribution more even simultaneously.
In sum, direct-type heat storage type combines with indirect type heat storage type by the present invention, conduction oil in access arrangement phase-change material cavity volume and phase-change material direct contact heat transfer, the conduction oil flowing through sidewall interlayer carries out indirect heat exchange by inner housing and phase-change material.By the combination of direct-type and indirect type accumulation of heat, accelerate the melting rate of heat-accumulating process further, reduce the dead band of phase-change material fusion process simultaneously most possibly, improve the maximum accumulation of energy of equipment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1.
In figure: 1, interlayer heat conductive oil inlet; 2, interlayer conduction oil outlet; 3, direct-type heat exchange conduction oil outlet; 4, heat-conducting fins; 5, direct-type heat exchange heat conductive oil inlet; 6, interlayer; 7, phase-change material; 8, inner housing; 9, shell body.
Detailed description of the invention
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1 and Fig. 2, a kind of phase transition heat accumulation unit of sandwich heating, comprises inner housing 8 and shell body 9, between described inner housing 8 and described shell body 9, is formed with interlayer 6; In described inner housing 8, be formed with phase-change material cavity volume, described inner housing 8 is provided with direct-type heat exchange heat conductive oil inlet 5 and direct-type heat exchange conduction oil outlet 3; Described shell body 9 is provided with interlayer heat conductive oil inlet 1 and interlayer conduction oil outlet 2.
In the present embodiment, in order to strengthen heat transfer effect further, the inwall of described inner housing 8 is provided with the heat-conducting fins 4 being distributed in described phase-change material cavity volume inside.Heat-conducting fins 4 is made to be distributed in phase-change material inside.Heat-conducting fins 4, except adopting straight rib, can also select the heat-conducting fins of other shapes, and the material of heat-conducting fins can be the material that the thermal conductivity factor such as metal, graphite is high.Or in order to strengthen heat transfer effect further, in the present embodiment, it is inner that described direct-type heat exchange heat conductive oil inlet 5 extends to described phase-change material cavity volume, is provided with protective cover at the head of described direct-type heat exchange heat conductive oil inlet 5.Direct-type heat exchange heat conductive oil inlet 5 is made directly to be distributed in phase-change material inside; high temperature heat conductive oil and phase-change material is enable to carry out heat exchange more quickly and evenly; arrange protective cover at the head of direct-type heat exchange heat conductive oil inlet 5, the inside that can prevent phase-change material from entering direct-type heat exchange heat conductive oil inlet 5 results in blockage.Or in order to strengthen heat transfer effect further, in the present embodiment, make described direct-type heat exchange conduction oil outlet 3 be positioned at the top of described inner housing, high temperature heat conductive oil is flowed from bottom to top.That is: the density of conduction oil is greater than the density of phase-change material.Also have a prerequisite: conduction oil and phase-change material immiscible.Phase-change material should be chosen according to the temperature of thermal source, in addition, should choose the phase-change material that latent heat of phase change is high, thermal conductivity factor is high.In like manner, described interlayer heat conductive oil inlet 1 is positioned at the bottom of described shell body 9, and described interlayer conduction oil outlet 2 is positioned at the top of described shell body 9.
Operation principle of the present invention:
Accumulation of heat operating mode: solar energy or industrial exhaust heat transfer heat to conduction oil, wherein one high temperature heat conductive oil enters in phase-change material cavity volume by pipeline by direct-type heat exchange heat conductive oil inlet 5, with phase-change material 7 direct contact heat transfer, entrained heat is passed to phase-change material by high temperature heat conductive oil, phase-change material melted by heat, heat is stored with the form of latent heat, because the density of high temperature heat conductive oil is less than phase-change material, and conduction oil and phase-change material immiscible, so conduction oil can upwards flow, flow out from direct-type heat exchange conduction oil outlet 3.Simultaneously, another strand of high temperature heat conductive oil flows into from interlayer heat conductive oil inlet 1, flow from bottom to top along interlayer 6, flow out from interlayer conduction oil outlet 2, this strand of conduction oil carries out indirect heat exchange by inner housing 8 and phase-change material 7, accelerate the fusing of inner housing side-walls and bottom phase-change material, meanwhile, the heat exchange in fin semi-finals interlayer between high temperature heat conductive oil and phase-change material 7.Until phase-change material all becomes liquid state in phase-change material cavity volume, heat-accumulating process terminates.
Heat release operating mode: low temperature conduction oil can enter storage heater by interlayer heat conductive oil inlet 1 and direct-type heat exchange heat conductive oil inlet 5 simultaneously carry out heat exchange, also can enter storage heater by interlayer heat conductive oil inlet 1 or direct-type heat exchange heat conductive oil inlet 5 separately and carry out heat exchange.The conduction oil entered by direct-type heat exchange heat conductive oil inlet 5 directly contacts with phase-change material, flows out from direct-type heat exchange conduction oil outlet 3 through heat exchange; The storage heater being entered interlayer by interlayer heat conductive oil inlet 1 carries out heat exchange by sidewall and phase-change material, flows out from interlayer conduction oil outlet 2.The heat stored is passed to low temperature conduction oil by phase-change material, and low temperature conduction oil temperature raises, and phase-change material is become solid-state from liquid state.
Although be described the preferred embodiments of the present invention by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, can also make a lot of form, these all belong within protection scope of the present invention.
Claims (5)
1. a phase transition heat accumulation unit for sandwich heating, is characterized in that, comprise inner housing and shell body, between described inner housing and described shell body, be formed with interlayer; In described inner housing, be formed with phase-change material cavity volume, described inner housing is provided with direct-type heat exchange heat conductive oil inlet and the outlet of direct-type heat exchange conduction oil; Described shell body is provided with interlayer heat conductive oil inlet and the outlet of interlayer conduction oil.
2. the phase transition heat accumulation unit of sandwich heating according to claim 1, is characterized in that, the inwall of described inner housing is provided with the heat-conducting fins being distributed in described phase-change material cavity volume inside.
3. the phase transition heat accumulation unit of sandwich heating according to claim 1, it is characterized in that, it is inner that described direct-type heat exchange heat conductive oil inlet extends to described phase-change material cavity volume, is provided with protective cover at the head of described direct-type heat exchange heat conductive oil inlet.
4. the phase transition heat accumulation unit of sandwich heating according to claim 1, is characterized in that, described direct-type heat exchange conduction oil outlet is positioned at the top of described inner housing.
5. the phase transition heat accumulation unit of sandwich heating according to claim 1, it is characterized in that, described interlayer heat conductive oil inlet is positioned at the bottom of described shell body, and described interlayer conduction oil outlet is positioned at the top of described shell body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510312578.5A CN104930896A (en) | 2015-06-09 | 2015-06-09 | Phase change heat storage device with interlayer heating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510312578.5A CN104930896A (en) | 2015-06-09 | 2015-06-09 | Phase change heat storage device with interlayer heating |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106885486A (en) * | 2017-03-15 | 2017-06-23 | 江苏启能新能源材料有限公司 | A kind of New-type phase change heat storage type device and method |
| CN108273466A (en) * | 2018-01-30 | 2018-07-13 | 天津大学 | A kind of spiral deflector steam heating reaction kettle heat-exchanger rig with holes |
| CN110440369A (en) * | 2019-08-23 | 2019-11-12 | 哈尔滨商业大学 | Direct contact-type phase transformation high-efficiency energy-storage device and method for arranging |
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| JPH07229690A (en) * | 1993-12-21 | 1995-08-29 | Matsushita Electric Works Ltd | Heat exchanger |
| JP2008045771A (en) * | 2006-08-11 | 2008-02-28 | Kobelco Eco-Solutions Co Ltd | Heat transport system and heat transport method |
| CN202329329U (en) * | 2011-10-11 | 2012-07-11 | 河北科技大学 | Jacket type phase change thermal storage heat exchanger |
| CN202547463U (en) * | 2012-04-09 | 2012-11-21 | 河北科技大学 | Three-sleeve type phase change heat storage heat exchanger |
| JP2013194927A (en) * | 2012-03-15 | 2013-09-30 | National Institute Of Advanced Industrial Science & Technology | Regenerative heat exchanger and heat input/output method using the same |
| CN203687722U (en) * | 2014-02-14 | 2014-07-02 | 河北科技大学 | Finned phase change heat storage heat exchanger |
| CN204705248U (en) * | 2015-06-09 | 2015-10-14 | 天津大学 | A kind of phase transition heat accumulation unit of sandwich heating |
-
2015
- 2015-06-09 CN CN201510312578.5A patent/CN104930896A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07229690A (en) * | 1993-12-21 | 1995-08-29 | Matsushita Electric Works Ltd | Heat exchanger |
| JP2008045771A (en) * | 2006-08-11 | 2008-02-28 | Kobelco Eco-Solutions Co Ltd | Heat transport system and heat transport method |
| CN202329329U (en) * | 2011-10-11 | 2012-07-11 | 河北科技大学 | Jacket type phase change thermal storage heat exchanger |
| JP2013194927A (en) * | 2012-03-15 | 2013-09-30 | National Institute Of Advanced Industrial Science & Technology | Regenerative heat exchanger and heat input/output method using the same |
| CN202547463U (en) * | 2012-04-09 | 2012-11-21 | 河北科技大学 | Three-sleeve type phase change heat storage heat exchanger |
| CN203687722U (en) * | 2014-02-14 | 2014-07-02 | 河北科技大学 | Finned phase change heat storage heat exchanger |
| CN204705248U (en) * | 2015-06-09 | 2015-10-14 | 天津大学 | A kind of phase transition heat accumulation unit of sandwich heating |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106885486A (en) * | 2017-03-15 | 2017-06-23 | 江苏启能新能源材料有限公司 | A kind of New-type phase change heat storage type device and method |
| CN108273466A (en) * | 2018-01-30 | 2018-07-13 | 天津大学 | A kind of spiral deflector steam heating reaction kettle heat-exchanger rig with holes |
| CN110440369A (en) * | 2019-08-23 | 2019-11-12 | 哈尔滨商业大学 | Direct contact-type phase transformation high-efficiency energy-storage device and method for arranging |
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Application publication date: 20150923 |