CN202126198U - High-temperature phase-change heat-storage core device - Google Patents
High-temperature phase-change heat-storage core device Download PDFInfo
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- CN202126198U CN202126198U CN2011201674770U CN201120167477U CN202126198U CN 202126198 U CN202126198 U CN 202126198U CN 2011201674770 U CN2011201674770 U CN 2011201674770U CN 201120167477 U CN201120167477 U CN 201120167477U CN 202126198 U CN202126198 U CN 202126198U
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Abstract
The utility model belongs to the technical field of high-temperature phase-change energy storage, and particularly relates to a high-temperature phase-change heat-storage core device which comprises a heat storage unit and a temperature control unit, wherein the heat storage unit comprises a heating element, an anti-corrosion container with a fin, a heat exchange system and a heat insulation structure; the heating element is arranged in the middle of the anti-corrosion container and transfers heat from inside to outside, phase-change material is arranged in the anti-corrosion container, the air heat exchange system is arranged outside the container, and the heat insulation structure is arranged outside the whole unit; the temperature control unit comprises a thermocouple and a temperature controller, and the temperature controller is connected with one end of the thermocouple. Compared with the prior art, the high-temperature phase-change heat-storage core device has the advantages of being simple to operate, low in cost, suitable for high-temperature heat storage, high in heat storage and discharge efficiency and the like.
Description
Technical field
The utility model belongs to high-temperature phase-change energy storage technology field, is specifically related to a kind of high-temperature phase-change heat storage core apparatus.
Background technology
The twentieth century middle and later periods begins; World Economics gets into the new period of high speed development, and the quick raising of the high speed development of production and living standards of the people causes energy resource consumption sharply to increase; And the energy can't rationally utilize under a lot of situation; Thereby cause a large amount of wastes of the energy, at this moment just needing kind of material can store energy, discharges when needing to be used again.Understanding and research to the thermal energy storage material only are the things of nearly decades; Since the thirties in 20th century; Particularly receive the influence of the energy crisis eighties; The basic theory of energy storage and application technical research emerge rapidly and are constantly developed in developed country (U.S., Canada, Japan, Germany etc.), and interpenetrating with fast development of field such as material science, solar energy, space technology, Engineering Thermophysics, building air-conditioning heating and ventilation and industrial waste heat utilization have been created condition for the research and the application of thermal energy storage material.Because the application of phase-change material very extensively, has become a kind of new material that comes into one's own day by day at present.
Phase-change material can store the energy or the natural energy resources of these wastes as a kind of energy storage material, and discharges according to different demands, makes the energy obtain reasonable use.Its application mainly comprises solar energy thermal-power-generating, industrial heat utilization and waste heat recovery, power peak regulation, building energy conservation, agricultural greenhouse, Aero-Space equipment etc.Wherein, the development and utilization of solar energy then is wherein a kind of effective energy storage approach.And solar energy thermal-power-generating one of the most promising energy storage mode especially, the many countries of world in recent years have obtained development fast.To the demand of solar energy thermal-power-generating, high-temperature phase-change energy storage material becomes the new material that comes into one's own day by day.
The kind of high temperature phase change material (pcm) comprises several kinds: simple salt is mainly fluoride, chloride and the carbonate of some alkali metal or alkaline-earth metal.Metal and Alloy, big because of its melting heat such as aluminium and alloy thereof, thermal conductivity is high, and steam pressure is low, is a kind of heat storage material preferably.Alkali, because its specific heat is high, melting heat is big, and stability is strong, and the steam pressure under the high temperature is low, and low price also is a heat storage material preferably.Salt-mixture, biggest advantage are that the melt temperature of material is adjustable, can as required various salts be mixed with the heat storage material that uses in 100～1000 ℃ of temperature ranges.Oxide, major part is very high as the serviceability temperature of the oxide of potential phase-change material, and melting heat is bigger.At present, use more be the inorganic salts phase-change material as heat-storage medium, and test its thermal storage performance.
Yet to the high-temperature phase-change Study on Technology, the limitation of material unstability, corrosivity and method of testing makes the high-temperature phase-change The Application of Technology be very limited during owing to high temperature.Such as, inorganic salts and metal phase change material are very big to the corrosivity of container during high temperature, reduce device service life; Material may volatilize or decompose during high temperature, thus the corrosion container; High temperature is bigger to apparatus damage.In addition, for the inorganic salts phase-change material, heat conductivility is relatively poor, influences the exothermicity of holding of device.Therefore, the phase change material device of design of High Efficiency has great importance to high-temperature phase-change heat storage Study on Technology and application.
Summary of the invention
The purpose of the utility model is exactly that quantity of heat storage is low in order to overcome, heat accumulation efficient is little, the shortcoming of inorganic salts heat conduction, heat exchange property difference and provide a kind of simple to operate, with low cost, be fit to high-temperature heat-storage, hold the high high-temperature phase-change heat storage core apparatus of exothermal efficiency.
The high-temperature phase-change heat storage core apparatus that the utility model provides comprises heat storage units and temperature conditioning unit, and described heat storage units comprises heating element heater, anti-corrosion container, heat-exchange system and insulation construction; Wherein, anti-corrosion container outer wall is cube shaped, is welded by high temperature resistant stainless steel, and the center is the circular hollow steel pipe, is welded with the stainless steel fin between hollow steel pipe and the anti-corrosion container inner wall, and high temperature phase change material (pcm) places anti-corrosion container; Heating element heater conducts heat in the middle of the hollow steel pipe of anti-corrosion container from inside to outside; Heat-exchange system is welded as the sealing integral body with certain thickness air layer at anti-corrosion external container with anti-corrosion container, is cubic in appearance, installs place, diagonal angle suitable for reading and is provided with the recuperated gas import and export; Insulation construction is in the outside of whole heat storage units; Described temperature conditioning unit comprises thermocouple and temperature controller, and the thermocouple temperature measurement end is with protection tube, places the phase-change material the inside, and the other end links to each other with temperature controller.
Further, in the utility model:
Described high temperature phase change material (pcm) is one or more of inorganic salts phase-change material, said inorganic salts phase-change material such as lithium chloride, sodium carbonate or lithium carbonate etc.
Described heating element heater can be Elema, and heating-up temperature reaches 1000 ℃.
Described finned anti-corrosion container can be high-temperature corrosion resistance stainless steel 316L.
Described heat-exchange system can be the gas converting heat system.
Described insulation construction can be made up of the high-temperature-resistant thermal-insulation material.
Described thermocouple can be K type pyrometer couple.
Described temperature controller can adopt TCW-32A type temperature controller.
Compared with prior art, the utility model high-temperature phase-change heat storage core apparatus is simple in structure, can be made into different sizes, and is easy to use; The heat accumulation temperature is high, and heat-transfer effect is good, holds the exothermal efficiency height, but modularization is used; Equipment investment is few, and cost of material is cheap to be easy to get, and operates simple and easy.
Description of drawings
Fig. 1 is the structural representation of the utility model high-temperature phase-change heat storage core apparatus.
Fig. 2 is the cross-sectional illustration of the utility model high-temperature phase-change heat storage core apparatus.
Temperature-time graph when Fig. 3 does phase-change material for lithium chloride.
Temperature-time graph when Fig. 4 does phase-change material for sodium carbonate and lithium carbonate mixed inorganic.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
As shown in Figure 1, a kind of high-temperature phase-change heat storage core apparatus, this device comprise heat storage units and note temperature conditioning unit; Described heat storage units comprises that heating-up temperature can reach 1000 ℃ heating element heater 1, the band fin rustless steel container 2 of high-temperature corrosion resistance, heat-exchange system 3; Resistant to elevated temperatures outer insulation construction 4, described temperature conditioning unit comprise high temperature heat-resistant galvanic couple 5 and temperature controller 6, and the thermometric section of thermocouple is with insulating tube; Be inserted in the phase-change material, the other end links to each other with temperature controller.The apparatus structure sterogram is as shown in Figure 2, and this device can require to make different sizes according to different heat accumulations, selects for use inorganic salts as phase-change material.
Embodiment 1:
Take by weighing M=10kg inorganic salts phase-change material lithium chloride (LiCl) with electronic scale; Pack in the high-temperature phase-change heat storage core apparatus; The thermometric end of thermocouple is put ceramic protecting pipe be inserted in the inorganic salts phase-change material, the thermocouple other end is received on the temperature controller, covers insulation cover.The temperature controller ceiling temperature is set, connects the heating element heater power supply, material is heated,, draw out temperature-time graph with material temperature situation of change in the temperature measurer real time record device.Stop heating when above when temperature reaches the phase-change material phase transition temperature, can calculate total quantity of heat storage of high-temperature phase-change heat storage core apparatus according to material temperature.
Temperature-the time graph of material is as shown in Figure 3 in the device; Can find out in heating and cooling process, all have temperature platform to occur, the platform appearance temperature is at about 610 ℃; And temperature platform length is longer during cooling, shows that the lithium chloride phase-change material has very high heat storage capacity; Total quantity of heat storage of high-temperature phase-change heat storage core apparatus comprises the sensible heat and the latent heat of material, and computing formula does
, wherein,
MBe the quality of phase-change material,
c p Be the phase-change material specific heat capacity,
T s Be the temperature of phase-change material arrival,
T m Be room temperature,
Δ HThe heat of transformation for phase-change material.Can calculate by formula that the heat storage capacity of this heat accumulation core apparatus reaches 12MJ when using lithium chloride (LiCl) phase-change material to carry out heat accumulation, can reach the purpose of high effective heat-storage.
Embodiment 2:
With electronic scale difference weighing m
1=6kg sodium carbonate (Na
2CO
3) and m
2=4kg lithium carbonate (Li
2CO
3) the inorganic salts phase-change material, in the high-temperature phase-change heat storage core apparatus of packing into after mixing, the thermometric end of thermocouple being put ceramic protecting pipe be inserted in the phase-change material, the thermocouple other end is received on the temperature controller, covers insulation cover.The temperature controller ceiling temperature is set, connects the heating element heater power supply, material is heated,, draw out temperature-time graph with material temperature situation of change in the temperature measurer real time record device.Stop heating when above when temperature reaches the phase-change material phase transition temperature, can calculate total quantity of heat storage of high-temperature phase-change heat storage core apparatus according to material temperature.
Temperature-the time graph of material is as shown in Figure 4 in the device, can find out, in heating and cooling process, all has temperature platform to occur, and the platform appearance temperature is at about 500 ℃, and temperature platform length is longer, shows sodium carbonate (Na
2CO
3) and lithium carbonate (Li
2CO
3) the mixed inorganic phase-change material has very high heat storage capacity; Total quantity of heat storage of high-temperature phase-change heat storage core apparatus comprises the sensible heat and the latent heat of material, and computing formula does
, wherein,
m 1 With
m 2 Be the quality of phase-change material,
c p Be the combined phase-change material specific heat capacity,
T s Be the temperature of phase-change material arrival,
T m Be room temperature,
Δ HThe heat of transformation for combined phase-change material.Can calculate use sodium carbonate (Na by formula
2CO
3) and lithium carbonate (Li
2CO
3) heat storage capacity of this heat accumulation core apparatus reached 11.5MJ when combined phase-change material carried out heat accumulation, can reach the purpose of high effective heat-storage.
Claims (7)
1. a high-temperature phase-change heat storage core apparatus is characterized in that comprising heat storage units and temperature conditioning unit; Said heat storage units comprises heating element heater, anti-corrosion container, heat-exchange system and insulation construction; Wherein, said anti-corrosion container outer wall is cube shaped, is welded by high temperature resistant stainless steel; The center is the circular hollow steel pipe, is welded with the stainless steel fin between hollow steel pipe and the anti-corrosion container inner wall; High temperature phase change material (pcm) places anti-corrosion container; Said heating element heater conducts heat in the middle of anti-corrosion container from inside to outside; Heat-exchange system is welded as the sealing integral body with certain thickness air layer at anti-corrosion external container with anti-corrosion container, is cubic in appearance, installs place, diagonal angle suitable for reading and is provided with the recuperated gas import and export; Insulation construction is in the outside of whole heat storage units; Described temperature conditioning unit comprises thermocouple and temperature controller, and the thermocouple temperature measurement end is with protection tube, places the high temperature phase change material (pcm) the inside, and the other end links to each other with temperature controller.
2. high-temperature phase-change heat storage core apparatus according to claim 1 is characterized in that described high temperature phase change material (pcm) is the inorganic salts phase-change material.
3. high-temperature phase-change heat storage core apparatus according to claim 1 is characterized in that described high temperature phase change material (pcm) is lithium chloride, sodium carbonate or lithium carbonate.
4. high-temperature phase-change heat storage core apparatus according to claim 1 is characterized in that described heating element heater is an Elema, and heating-up temperature reaches 1000 ℃.
5. high-temperature phase-change heat storage core apparatus according to claim 1 is characterized in that the material of described finned anti-corrosion container adopts high-temperature corrosion resistance stainless steel 316L.
6. high-temperature phase-change heat storage core apparatus according to claim 1 is characterized in that described heat-exchange system adopts the gas converting heat system.
7. high-temperature phase-change heat storage core apparatus according to claim 1 is characterized in that described insulation construction is made up of the high-temperature-resistant thermal-insulation material.
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| CN2011201674770U CN202126198U (en) | 2011-05-24 | 2011-05-24 | High-temperature phase-change heat-storage core device |
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| CN2011201674770U CN202126198U (en) | 2011-05-24 | 2011-05-24 | High-temperature phase-change heat-storage core device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713398A (en) * | 2013-12-17 | 2015-06-17 | 昆山巨仲电子有限公司 | Energy storage module and energy storage element thereof |
| WO2016011864A1 (en) * | 2014-07-24 | 2016-01-28 | 台州市大江实业有限公司 | Phase-change thermal accumulator |
-
2011
- 2011-05-24 CN CN2011201674770U patent/CN202126198U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713398A (en) * | 2013-12-17 | 2015-06-17 | 昆山巨仲电子有限公司 | Energy storage module and energy storage element thereof |
| WO2016011864A1 (en) * | 2014-07-24 | 2016-01-28 | 台州市大江实业有限公司 | Phase-change thermal accumulator |
| CN105318764A (en) * | 2014-07-24 | 2016-02-10 | 台州市大江实业有限公司 | Phase-change heat accumulator |
| CN105318764B (en) * | 2014-07-24 | 2017-06-13 | 台州市大江实业有限公司 | A kind of phase change heat accumulator |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120125 Termination date: 20140524 |