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Preparation method for calcium chloride trihydrate phase change energy storage material

A technology of calcium chloride trihydrate and phase change energy storage materials, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of high thermal conductivity, low thermal conductivity, easy aging, etc., and achieve the effect of simple method

Inactive Publication Date: 2015-11-11
贵州华益能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic phase change energy storage materials such as paraffin have low thermal conductivity and poor heat transfer performance, which reduces the efficiency of the system. Hybrid phase change energy storage materials have the advantage of being adjustable within a certain range, but they are easy to age. After several cycles After that, the energy storage effect will be lost. Inorganic phase change energy storage materials have the advantages of wide application range, large thermal conductivity, high heat storage density, small phase change volume, low toxicity, and low price. Among them, inorganic salt hydrate is the low-temperature phase change storage material. The most important class of thermal materials, but there are not many materials with phase transition temperature and high heat enthalpy for inorganic hydrated salt phase change energy storage materials, so according to different needs, try to change the existing inorganic hydrated salt phase transition temperature and Energy storage effect

Method used

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  • Preparation method for calcium chloride trihydrate phase change energy storage material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) Take calcium chloride hexahydrate CaCl 2 ·6H 2 O2g, join in the 100g ethanol solution, stir and dissolve, filter to get calcium chloride hexahydrate CaCl 2 ·6H 2 O ethanol solution;

[0013] (2) Heating the calcium chloride hexahydrate ethanol mixture to 30°C for vacuum distillation, when the fraction reaches 100.1g, stop the distillation, cool to below 20°C to obtain calcium chloride trihydrate CaCl2 3H2O solid;

[0014] (3) Get calcium chloride trihydrate CaCl2 3H2O to do DSC differential scanning calorimetry curve, such as figure 1 .

Embodiment 2

[0016] Measurement of crystal water in calcium chloride trihydrate phase change energy storage materials

[0017] Take 100 g of the sample CaCl2 XH2O obtained by the preparation method of a calcium chloride trihydrate phase-change energy storage material of the present invention, heat it to a constant temperature of 300 ° C, take it out and weigh it every 1 hour, and weigh it continuously for 3 times until it reaches a constant weight. The sample CaCl2·XH2O completely loses the water of crystallization, and the mass of the remaining solid is 67.27g. 100g sample CaCl2 XH2O loses crystallization water completely after heating, and only CaCl2 is 67.27g, so the crystallization water XH2O is 32.73g, and X in sample CaCl2XH2O is 3, that is, a calcium chloride trihydrate phase change storage of the present invention The molecular formula of the obtained sample is: CaCl2·3H2O.

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Abstract

The invention discloses a preparation method for a calcium chloride trihydrate phase change energy storage material and relates to a hydrated salt phase change energy storage material, a low-temperature phase change energy storage material. By virtue of a method of changing CaCl2 crystal water, CaCl2.6H2O is changed to CaCl2.3H2O, so that the purpose of changing the phase change temperature and phase change enthalpy is realized. The invention discloses a specific method for changing CaCl2.6H2O to CaCl2.3H2O, and the method has the characteristic of being simple and convenient.

Description

technical field [0001] The invention belongs to a hydrated salt phase-change energy storage material, and relates to a low-temperature phase-change energy storage material, in particular to a preparation method of a calcium chloride trihydrate phase-change energy storage material. Background technique [0002] Phase-change heat storage materials can be divided into organic, inorganic, and organic-inorganic hybrids according to their chemical composition. Organic phase change energy storage materials such as paraffin have low thermal conductivity and poor heat transfer performance, which reduces the efficiency of the system. Hybrid phase change energy storage materials have the advantage of being adjustable within a certain range, but they are easy to age. After several cycles After that, the energy storage effect will be lost. Inorganic phase change energy storage materials have the advantages of wide application range, large thermal conductivity, high heat storage density, ...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 骆相全
Owner 贵州华益能环保科技有限公司