Preparation method of sizing composite heat storage material for moderate-high temperature

Abstract

The invention discloses a preparation method of a sizing composite heat storage material for moderate-high temperature, comprising the following steps: treating vermiculite under the temperature of 1300 DEG C for 20min, cooling, and mixing with phase change materials according to a mass ratio of 1 to 10, wherein the phase change materials consist of MgCl2, KCl and NaCl, and the sum of the phase change materials is 100 percent; preserving the heat of the mixture for 6h under the conditions of 400 DEG C and negative pressure of -15kPa, preparing a composite phase change material, mechanically crushing the composite phase change material into 40 meshes, adding modified carbon fiber, and then mechanically mixing for 24h, wherein the mass of the modified carbon fiber accounts for 2-8 percent of the total mass of the composite phase change material; dropwise adding a high temperature binder, performing compression moulding under the pressure of 10-20MPa, and finally preserving heat under the temperature of 300 DEG C for curing, thus obtaining the sizing composite heat storage material for moderate-high temperature. The sizing composite heat storage material is reasonable in material selection, strong in heat conductivity, high in heat storage density and wide in base material source, and the prepared sizing composite heat storage material has better heat stability, little leakage possibility and better application prospect.

Description

technical field [0001] The invention relates to the technical field of energy storage materials, in particular to a method for preparing a composite heat storage material for medium and high temperature after setting. Background technique [0002] The energy used for the development and life of human society mainly comes from non-renewable mineral energy such as coal, oil, and natural gas. During the use, it will cause environmental pollution such as air, water, and air, and bring great harm to the development and life of human society. pressure. Due to technical limitations, building a stable, economical, clean, and safe energy supply system is facing major challenges. In response to the increasingly urgent energy crisis, improving energy utilization efficiency can reduce the consumption of primary energy such as fossils, so it is of great significance. Heat storage technology is a feasible way to improve energy utilization efficiency, which is of great significance to th...

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Problems solved by technology

Document 4 (A.A.Jalalzadeh-azar, M.G.Steele, and G.A.Adebiyia.Performancecomparisonofhigh-temperaturepackedbedoperationwithPCMandsensible-heatpellets[J].EngeryRes.1997(21):1039-1052.) prepared Na 2 SO 4 / SiO 2 Composite heat storage material, the heat storage material has poor cycle stability

[0005] Applied patents on thermal storage materials, such as document 5 (CN201110020197.1) disclose a calcium chloride hexahydrate phase-change energy storage material composition and a preparation method thereof. The thermal storage material prepared by this method is inconvenient to use and has no Solve the problems of low thermal conductivity and easy leakage

Document 6 (Ross; RandyUSpatent.No.5685151) reports a kind of thermal storage material that is used for solar energy, and the main component of this material is sodium chloride, and its dress container is special stainless steel material, and is expensive

Document 7 (CN201210018441.5) discloses a high-temperature composite phase-change heat storage material and its preparation method. The material is prepared by co-firing with inorganic salt, ceramic base and high thermal conductivity material. The preparation process of this method is simple and the thermal conductivity is good. , but prone to leakage

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