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Calcium chloride hexahydrate phase change energy storage material and preparation method therefor

A phase change energy storage material and phase change material technology are applied in the field of low temperature phase change energy storage materials to achieve the effects of improving cycle efficiency, simple method and strong reliability

Inactive Publication Date: 2015-11-25
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently for CaCl 2 ·6H 2 The research on O is mostly focused on reducing its subcooling degree, and there is little research on solving phase separation and improving cycle performance.

Method used

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  • Calcium chloride hexahydrate phase change energy storage material and preparation method therefor

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Experimental program
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Effect test

specific Embodiment 2

[0013] Take 100gCaCl 2 , add 100g deionized water, add 6gMgCl to the reaction system 2 ; Form a simple inorganic phase change material solution A. 10g sorbifolia husk was calcined at 600℃ for 4h. Soak the calcined radix sorbifolia husk in the inorganic phase change material solution A, and stir (800rpt) for 10h. The soaked sorbifolia husk was solidified at room temperature for 10 hours to obtain the product.

specific Embodiment 3

[0014] Take 100gCaCl 2 , add 80g deionized water, add 4gMgCl to the reaction system 2 ; Form a simple inorganic phase change material solution A. 10g sorbifolia husk was calcined at 500℃ for 7h. Soak the calcined radix radix sorbifolium husk in the inorganic phase change material solution A, and stir (300rpt) for 12h. After soaking, the sorbifolia husk was solidified at room temperature for 6 hours to obtain the product.

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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 [0001] The invention relates to a low-temperature phase change energy storage material, that is, an energy storage material and its preparation technology. technical background [0002] CaCl 2 ·6H 2 O is a common inorganic hydrated salt. It has a phase transition temperature that is more suitable for the human body environment, a large heat of fusion (190kJ / kg), is not easy to decompose, is cheap and easy to obtain, and is safe and non-toxic. But it is the same as all inorganic hydrated salts Similar to phase change materials, there is a serious problem of supercooling (the supercooling degree reaches 20°C), which leads to the inability of the substance to undergo phase change in time, thus affecting the timely release and utilization of heat; and there is a phase separation problem, which makes the phase change process Irreversible, forming phase stratification, resulting in inhomogeneous dissolution, resulting in a gradual decline in the energy storage ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 王晓红孙钟张怀中
Owner NORTHEAST NORMAL UNIVERSITY
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