CN105086947A - Calcium chloride hexahydrate phase change energy storage material and preparation method therefor - Google Patents
Calcium chloride hexahydrate phase change energy storage material and preparation method therefor Download PDFInfo
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- CN105086947A CN105086947A CN201410189020.8A CN201410189020A CN105086947A CN 105086947 A CN105086947 A CN 105086947A CN 201410189020 A CN201410189020 A CN 201410189020A CN 105086947 A CN105086947 A CN 105086947A
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- cacl
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- shinyleaf yellowhorn
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Abstract
The invention relates to a low-temperature phase change energy storage material, particularly an energy storage material comprising CaCl2.6H2O and a preparation method therefor. The energy storage material is shinyleaf yellowhorn shell loaded salt hydrate CaCl2.6H2O which is prepared by mixing shinyleaf yellowhorn shells with salt hydrate, wherein CaCl2.6H2O exists in the shinyleaf yellowhorn shells in form of dispersed minute particles. The energy storage material provided by the invention has the advantages that the CaCl2.6H2O energy storage material has the characteristics of regulated phase change temperature, high thermal cycling stability, low degree of supercooling and the like, is good in chemical stability, non-toxic, green, environmental-friendly, safe, incombustible and great in density, and the cost of the container is lowered. Moreover, the preparation method is simple.
Description
Technical field
The present invention relates to a kind of low-temperature phase-change energy-storing material, i.e. a kind of energy storage material and technology of preparing.
Technical background
CaCl
26H
2o is a kind of common inorganic hydrated salt, and it has and is relatively applicable to the transformation temperature of human body environment, and (190kJ/kg, not easily decomposes, and is cheaply easy to get, safety non-toxic for large Heat of fusion.But it is similar with all inorganic hydrated salt class phase change materials, there is cold serious problem (its condensate depression reaches 20 DEG C), and caused material not undergo phase transition in time, thus had influence on timely release and the utilization of heat; And there is problem of phase separation, make phase transition process irreversible, form phase layering, lead lysogenic ununiformity, thus cause the energy storage capacity of this energy storage material to decline gradually.These two kinds of shortcomings all hinder CaCl
26H
2the widespread use of O phase change material.Existing bibliographical information (Xu Yunlong, Liu Dong, material engineering, supplementary issue, 218 in 2006; ), in system, add borax (Na
2b
4o
710H
2o), six water strontium chloride (SrCl
26H
2o), magnesium chloride hexahydrate (MgCl
26H
2o), barium fluoride (BaF
2), barium carbonate (BaCO
3) as CaCl
26H
2the nucleator of O, studies its surfusion.Document is only to CaCl
26H
2the condensate depression of O mixed system has carried out systematic research, does not provide the changing conditions of the rear fusion enthalpy of repeatedly circulation, does not have to solve the method be separated; And do not provide transformation temperature regulatable method.At present for CaCl
26H
2the research of O focuses mostly in its condensate depression of reduction, and the solution raising that is separated is recycled to the research of performance aspect and lacks.
Summary of the invention
The object of this invention is to provide that a kind of thermal circulation performance is stable, condensate depression is low, the regulatable CaCl of transformation temperature
26H
2o Low-Grade Thermal-Energy Storage Material.Another object of the present invention be to provide a kind of repeatability high, test workable, safe and reliable CaCl
26H
2o Low-Grade Thermal-Energy Storage Material preparation method.
For achieving the above object, the method for the inorganic-organic hybridization of the present invention's employing prepares CaCl
26H
2o Low-Grade Thermal-Energy Storage Material: the mixture formed by shinyleaf yellowhorn shell carrying inorganic salt hydrate, CaCl
26H
2o is dispersed in shinyleaf yellowhorn shell, and phase change material is the material of inorganic-carbon hydridization.The weight percent 1 ~ 10% of sodium alginate in material, water and CaCl
2mol ratio be 4 ~ 8:1.The preparation method of phase change material, with CaCl
2for main raw material, add deionized water, water and CaCl
2mol ratio be 4 ~ 8:1, in this reaction system, add MgCl
2, Na
2b
4o
7, KCl, NaCl etc. are separated hold back agent, its content is 1 ~ 6%; Form simple inorganic phase-changing material solution A.Shinyleaf yellowhorn shell is at 300 ~ 600 DEG C of calcining 5 ~ 8h.Shinyleaf yellowhorn shell after calcining is immersed in inorganic phase-changing material solution A, stirs (300 ~ 1000rpt) 5 ~ 16h.Shinyleaf yellowhorn shell after immersion at room temperature solidifies 6 ~ 12h, obtains product.
Described main inorganic raw material CaCl
26H
2o, CaCl
26H
2o+MgCl
26H
2o, CaCl
26H
2o+KCl, CaCl
26H
2o+KCl+NaCl.
Advantage of the present invention:
1, transformation temperature is adjustable.This invention exploits transformation temperature from the cryogenic material between 15 DEG C ~ 30 DEG C.
2, CaCl is significantly reduced adding of nucleator
26H
2o condensate depression, between 0.5 ~ 5 DEG C.
3, inorganic-carbon hydridization is adopted to prepare inorganic compounding phase-changing energy storage material, CaCl
26H
2o is loaded in the duct of shinyleaf yellowhorn shell, forms micrometer structure, overcomes inorganic materials CaCl
26H
2the shortcoming that O is separated, improves and recycles efficiency.Synthesized CaCl
26H
2o phase change material phenomenon of phase separation is improved greatly, and through 20 circulations, fusion enthalpy does not obviously decay (accompanying drawing 1).
4, synthetic method reliability is strong.The material performance difference between batches of synthesis is little.
5, application is convenient.The phase change material preparation method that the present invention uses is suitable for the requirement of industry, and method is simple, and be flow state at the initial stage of reaction mixing, be conducive to being filled in container, reaction finally completes in a reservoir.
Specific embodiment 1
Get 100gCaCl
2, add 110g deionized water, in this reaction system, add 3gMgCl
2; Form simple inorganic phase-changing material solution A.10g shinyleaf yellowhorn shell is at 300 DEG C of calcining 8h.Shinyleaf yellowhorn shell after calcining is immersed in inorganic phase-changing material solution A, stirs (1000rpt) 12h.Shinyleaf yellowhorn shell after immersion at room temperature solidifies 12h, obtains product.Change phase change material and can recycle 20 times, calorific value change is very little, and (Fig. 1 is CaCl therefore to prove that it has good stability
26H
2o phase-changing energy storage material recycle efficiency).
Specific embodiment 2
Get 100gCaCl
2, add 100g deionized water, in this reaction system, add 6gMgCl
2; Form simple inorganic phase-changing material solution A.10g shinyleaf yellowhorn shell is at 600 DEG C of calcining 4h.Shinyleaf yellowhorn shell after calcining is immersed in inorganic phase-changing material solution A, stirs (800rpt) 10h.Shinyleaf yellowhorn shell after immersion at room temperature solidifies 10h, obtains product.
Specific embodiment 3
Get 100gCaCl
2, add 80g deionized water, in this reaction system, add 4gMgCl
2; Form simple inorganic phase-changing material solution A.10g shinyleaf yellowhorn shell is at 500 DEG C of calcining 7h.Shinyleaf yellowhorn shell after calcining is immersed in inorganic phase-changing material solution A, stirs (300rpt) 12h.Shinyleaf yellowhorn shell after immersion at room temperature solidifies 6h, obtains product.
Claims (4)
1. a CaCl
26H
2o phase-changing energy storage material, is characterized in: the mixture formed by shinyleaf yellowhorn shell carrying inorganic salt hydrate, CaCl
26H
2o is dispersed in shinyleaf yellowhorn shell.
2. according to phase change material described in claim 1, it is characterized in that: the weight percent 1 ~ 10% of shinyleaf yellowhorn shell, water and CaCl
2mol ratio be 4 ~ 8:1.
3. the preparation method of phase change material described in claim 1, is characterized in that: with CaCl
2for main raw material, add deionized water, water and CaCl
2mol ratio be 4 ~ 8:1, in this reaction system, add MgCl
2, Na
2b
4o
7, KCl, NaCl etc. are separated hold back agent, its content is 1 ~ 6%; Form simple inorganic phase-changing material solution A.Shinyleaf yellowhorn shell is at 300 ~ 600 DEG C of calcining 5 ~ 8h.Shinyleaf yellowhorn shell after calcining is immersed in inorganic phase-changing material solution A, stirs (300 ~ 1000rpt) 5 ~ 16h.Shinyleaf yellowhorn shell after immersion at room temperature solidifies 6 ~ 12h, obtains product.
4., according to the preparation method of low-temperature phase-change material described in claim 3, it is characterized in that main inorganic raw material CaCl
26H
2o, CaCl
26H
2o+MgCl
26H
2o, CaCl
26H
2o+KCl, CaCl
26H
2o+KCl+NaCl.
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|---|---|---|---|
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Family
ID=54568298
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107556972A (en) * | 2017-08-24 | 2018-01-09 | 中国科学院青海盐湖研究所 | Normal low temperature phase change energy-accumulating medium and preparation method thereof |
| CN108676550A (en) * | 2018-07-04 | 2018-10-19 | 山东建筑大学 | A kind of inorganic hydrated salt porous carbon composite phase-change material and preparation method thereof |
| CN108728048A (en) * | 2018-04-23 | 2018-11-02 | 长沙理工大学 | A kind of ternary eutectic chlorate heat transfer heat-storing material and its preparation method and application |
| CN110079280A (en) * | 2019-05-29 | 2019-08-02 | 上海理工大学 | A kind of thermal energy storage material of binary hydrated salt |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107556972A (en) * | 2017-08-24 | 2018-01-09 | 中国科学院青海盐湖研究所 | Normal low temperature phase change energy-accumulating medium and preparation method thereof |
| CN107556972B (en) * | 2017-08-24 | 2021-03-02 | 中国科学院青海盐湖研究所 | Normal-low temperature phase change energy storage medium and preparation method thereof |
| CN108728048A (en) * | 2018-04-23 | 2018-11-02 | 长沙理工大学 | A kind of ternary eutectic chlorate heat transfer heat-storing material and its preparation method and application |
| CN108676550A (en) * | 2018-07-04 | 2018-10-19 | 山东建筑大学 | A kind of inorganic hydrated salt porous carbon composite phase-change material and preparation method thereof |
| CN110079280A (en) * | 2019-05-29 | 2019-08-02 | 上海理工大学 | A kind of thermal energy storage material of binary hydrated salt |
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Application publication date: 20151125 |
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