Shape-stabilized phase change energy storage material for building and preparation method thereof

Abstract

The invention relates to a shape-stabilized phase change energy storage material for building and a preparation method thereof. The material provided by the invention comprises components of: by weight, 70-85% of a composite phase change energy storage material with its melting point being 18-30 DEG C and 15-30% of gesso. The composite phase change energy storage material with its melting point being 18-30 DEG C is composed of a porous matrix and a mixed fatty acid phase change material, wherein the mass ratio of the porous matrix to the mixed fatty acid phase change material is 1:4-1:6. At the temperature of 60-80 DEG C, the porous matrix is added in the molten lauric acid-capric acid mixed fatty acid to prepare a composite phase change material. Then, gesso is mixed with the composite phase change material to prepare a shape-stabilized fatty acid phase change energy storage material with a more stable adsorption property. The prepared shape-stabilized phase change energy storage material has good thermal conductivity, good adsorption stability and good material plasticity, will not cause seepage at high temperature, is easy to mix with a building material, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of composite phase change energy storage materials, in particular to a shaped phase change energy storage material for buildings and a preparation method thereof. Background technique [0002] Phase change material (PCM) refers to the ability to change the phase state of a substance at a specific temperature or temperature range (phase change temperature), and absorb or release a large amount of latent heat of phase change along with the phase change process, and apply phase change materials to building materials , using the phase change latent heat of the phase change material to realize energy storage and utilization, which can achieve the purpose of reducing the energy consumption of the air conditioning system and improving the indoor thermal comfort. It is precisely because of this characteristic of phase change materials that phase change energy storage technology has become a hot research topic in the...

AI Technical Summary

Problems solved by technology

Through the comparison of the above processes, the preparation process of the physical adsorption method is simple, the preparation cost is low, and it is suitable for the preparation of fixed phase change energy storage materials for buildings. At present, more physical adsorption methods use expanded perlite, expanded graphite, bentonite, etc. as phases. Although the adsorption carrier of the material change material has good adsorption performance, it often has disadvantages such as fragility, poor adsorption stability of the fixed phase change material, and the lack of testing of the thermal conductivity of the material.

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