Sealing method of phase-change energy storage unit

Abstract

The invention relates to a sealing method of a phase-change energy storage unit which is simple in structure and good in economy. The phase-change energy storage unit comprises a casing, wherein a heat-insulating material layer is arranged in the casing, a liner casing is arranged in the heat-insulating material layer and filled with a phase-change material, the filling volume of the phase-change material accounts for 80%-98% of the volume of a liner, a sealing material layer floats on the surface of the phase-change material, and a heat-exchange coil pipe, an electric heating mechanism and a temperature sensor are embedded in the phase-change material; crystallization water separated out in a (solid-to-liquid) phase change process of the phase-change material can be locked below the sealing material layer, so that volatilization of the crystallization water is slowed down, the service life of the phase-change material is prolonged, the machining and manufacturing difficulty of a packaging container is reduced, the structural design of the packaging container is more diversified, the packaging container can be designed into a round shape or a small square shape, a sealing material can lock partial heat of the phase-change material, the heat loss is reduced, the heating speed of the phase-change material is increased, and the heating time is shortened.

Description

technical field [0001] The invention relates to the field of phase change energy storage, in particular to the field of sealing methods for phase change energy storage units. Background technique [0002] With the depletion of non-renewable energy in the world, improving the utilization of energy has become a hot spot of scientific research. Phase change energy storage materials absorb / release a large amount of heat during the phase change process, which is conducive to the recovery and utilization of waste heat, the storage of heat energy and the energy in time. And the transfer of space, so as to alleviate the contradiction of energy demand and save energy. [0003] Inorganic hydrated salt is the most commonly used phase change material. The advantages of this type of material are: large heat of solution, high thermal conductivity, small phase change volume, cheap price, etc. The phase change process of inorganic hydrated salt refers to the process of heating The process ...

AI Technical Summary

Problems solved by technology

If it is sealed with a packaging container, the packaging container must be made into a pressure container, which is expensive and difficult to process

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