Phase change heat storage material based on sodium acetate trihydrate, preparation method and heat insulation material

Abstract

The invention discloses a phase change heat storage material based on sodium acetate trihydrate, a preparation method and a heat insulation material. The method includes the steps: uniformly mixing the sodium acetate trihydrate and urea powder; heating the uniformly stirred mixed powder at constant temperature until the mixed powder is melted into transparent liquid; stirring the transparent liquid by a magnetic constant temperature stirrer; cooling the stirred transparent liquid at constant temperature, triggering phase change by the aid of a metal wire, and enabling the transparent liquid tocrystallize and release heat to obtain a composite phase change energy storage material. By the aid of the embodiment, a phase change potential heat value of the sodium acetate trihydrate is effectively increased, the heat-conducting property of the material is improved, phase separation is relieved, reaction conditions are controllable, device requirements are simple, mass production is easily achieved, heat energy is stably stored, the utilization rate of the heat energy is increased, and environments are protected.

Description

technical field [0001] The invention relates to the technical field of phase change energy storage, in particular to a phase change heat storage material based on sodium acetate trihydrate, a preparation method and a thermal insulation material. Background technique [0002] Today's energy utilization rate in developed countries is 43%, which is 10% higher than that in my country. A large part of the heat energy loss is not effectively stored when the heat consumption is low, or occurs during the storage process. Usually, the storage of heat is to store heat in a medium encapsulated with heat insulating materials, but absolute heat insulation is impossible, especially in the process of heat energy transportation and storage, once the external temperature is lower than the storage temperature, it will be persistent The loss of heat energy seriously reduces the utilization rate of energy and causes great waste. The phase change energy storage material has great advantages in ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a phase-change heat storage material based on sodium acetate trihydrate, a preparation method and a thermal insulation material, to solve existing problems, effectively increase the phase-change latent heat value of sodium acetate trihydrate at the same time, and improve the thermal conductivity of the material performance, alleviating phase separation

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