Material for storing heat of phase change in low temperature, and preparation method

A heat storage material, low temperature phase change technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of low repeatability and increased subcooling, and achieve good repeatability and stable heat release process. , the effect of stable performance

Inactive Publication Date: 2007-05-09
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been verified by experiments that the subcooling degree of the heat storage material tends to increase after repeated thermal cycles, and the repeatability is not high, so further improvement and improvement of the technical performance of the heat storage material are needed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The preparation method of above-mentioned formula is as follows:

[0015] According to the ingredients, put the main ingredient, aluminum ammonium sulfate, in a 90-100°C equipment to heat and melt it. After it is completely melted, add the additive calcium fluoride and carbon powder mixed uniformly at room temperature, and stir evenly, then add the additive deionization The water continues to stir evenly, and during the stirring process, the above-mentioned mixture is reheated to make it fully mixed and uniform into a fluid state, and finally poured into a container for packaging.

[0016] The following items should be paid attention to during the production process: (1) The above-mentioned chemical components should be sealed and stored in storage, especially when aluminum ammonium sulfate is exposed to the air at room temperature, it is easy to chemically react with carbon dioxide, which will affect the performance. The materials used in the present invention c...

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PUM

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Abstract

This invention discloses a method for preparing low-temperature phase transition heat-storage material, which is prepared from aluminum ammonium sulfate (major component), CaF2 (additive), carbon (additive) and deionized water (additive). The method comprises: heating aluminum ammonium sulfate to melt, adding CaF2 and carbon powder uniformly mixed at normal temperature, stirring uniformly, adding deionized water, stirring, heating the mixture for mixing uniformly, filling into a container, and packaging. The low-temperature phase transition heat-storage material has a high latent heat of phase transition, and the phase transition temperature is between 93-95 deg.C. Experiments show that the super-cooling degree of the material is below 4 deg.C, and no phase separation occurs.

Description

technical field [0001] The invention relates to a phase change thermal storage material. Specifically, it is a low-temperature phase-change thermal storage material and a preparation method thereof. Background technique [0002] Heat storage can solve the waste caused by the mismatch in time and space between heat energy supply and demand. Heat storage technology has been widely used in air conditioning, heating, construction and other fields. Compared with sensible heat storage materials, phase change heat storage materials have the advantages of high heat storage density, small heat storage volume, and stable heat release temperature. . [0003] Phase change heat storage materials are mainly divided into organic phase change heat storage materials and inorganic phase change heat storage materials. The former has stable performance, a wide range of phase transition temperatures, and almost no supercooling and phase separation in the exothermic process. However, its laten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 章学来赵兰杨建军施虹
Owner SHANGHAI MARITIME UNIVERSITY
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