Phase change heat storage material and preparation method thereof

Abstract

The invention discloses a phase change heat storage material, which consists of a main material barium hydroxide and an additive barium chloride, wherein the main material and the additive play a role in preventing overcooling and preventing phase separation. A preparation method of the material comprises the following steps: (1) heating and melting pure barium hydroxide; (2) adding the additive barium chloride, and fully mixing the mixture evenly into a fluid substance; and (3) filling the mixture into a container to perform packaging. The phase change heat storage material has the advantages of large phase change latent heat, stable heat release process, fewer additive types, simple preparation method and convenient production; besides, the phase change heat storage material is easy forpackaging after being melted into the state of an even fluid substance.

Description

Technical field: [0001] The invention relates to a novel material and a preparation method thereof, in particular to a phase change thermal storage material and a preparation method thereof. Background technique: [0002] Heat storage can solve the waste caused by the mismatch between heat energy supply and demand in terms of time and space. Heat storage technology has been widely used in air conditioning, heating and other fields. With the deepening of research, heat storage materials have gradually entered ecological buildings, etc. Emerging fields. Since the phase change heat storage material uses both the inherent heat capacity of the substance and the phase change heat of the state change to store heat energy, it has a large heat storage density. In recent years, research and application in this area have developed rapidly. [0003] The current research on phase change heat storage materials is mainly divided into two directions: organic phase change heat storage mater...

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Problems solved by technology

The performance of organic phase change heat storage materials is relatively stable, and there is almost no problem of supercooling and phase separation, but its disadvantages are also very obvious, that is, the latent heat of phase change is low, and the material density is small, resulting in the unit of organic phase change heat storage materials. The volume heat storage is small, especially compared to the high-temperature water heat storage technology that is currently being developed, the advantages of organic phase change heat storage materials in terms of heat storage per unit volume are no longer obvious

Inorganic phase change heat storage materials have high heat storage per unit volume and good thermal conductivity, but their disadvantages are that they are prone to supercooling and phase separation. If the problems of supercooling and phase separation can be solved by additives, then inorganic phase change heat storage materials It has very obvious advantages, and heat storage related industries can also be developed accordingly

[0004] At present, relevant researchers at home and abroad have done some work in this area and developed some phase change heat storage materials, some of which have been put into actual production and application, but there are still many problems: such as the developed phase change heat storage materials phase change The temperature is not suitable, resulting in too narrow use; the performance is unstable, especially the phase separation phenomenon occurs after a period of use

At present, the inorganic phase change materials in this temperature range are relatively vacant.

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