Composite phase-change heat storage material

Abstract

The invention relates to a phase-change heat storage material, in particular to a composite phase-change heat storage material with sodium sulfate decahydrate as a main body. The composite phase-change heat storage material disclosed by the invention overcomes the defects of small heat capacity, low thermal conductivity, poor stability and the like of the traditional well-know phase-change material; a brand-new composite phase-change heat storage material is formed by co-melting sodium sulfate, sodium carbonate, sodium borate, polycarboxylic acid, water used as a heat storage agent of the material, a temperature regulator, a crystallization nucleating agent, a suspension thickener and a raw material solvent; the composite phase-change heat storage material has the advantages of high heat capacity, proper phase-change temperature, high thermal conductivity, difficulty in generation of super-cooling phenomenon and the like; the heat storage material not only is suitable for daily heating requirements of organizations, enterprises, troops, families and the like, but also is applicable to special occasions such as high altitude, polar regions, oceans, desert, highland and mountainous areas with large temperature difference between day and night; in addition, the composite phase-change heat storage material disclosed by the invention has the characteristics of simple implementation, simple and easy manufacturing, durability, broad market prospect, and higher economic added value and social application value.

Description

technical field [0001] The invention relates to a phase change heat storage material, in particular to a composite phase change heat storage material using sodium sulfate decahydrate as a main body. [0002] Background technique [0003] Heat storage material refers to a material that can store a certain form of heat under certain conditions, and can be released and utilized under certain conditions. Thermal storage materials generally must have the characteristics of good reversibility, high energy storage density, and strong operability. [0004] At present, the known heat storage materials can be roughly divided into three types: sensible heat type, latent heat type and chemical reaction type according to the heat storage method. [0005] The so-called sensible heat storage means that when the material stores and releases heat energy, except for the temperature change of the material itself, other forms and characteristics of the material do not change. The sensible he...

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Problems solved by technology

[0030] In order to overcome defects such as small heat capacity, low thermal conductivity, and poor stability of known phase change materials, the present invention provides a brand-new composite phase change material. The phase change material not only has a large heat capacity, but also has a suitable phase change temperature, High thermal conductivity, and not prone to supercooling and phase separation, easy to implement

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