Heat storage phase change heat exchanger and method for promoting crystallization of sugar alcohol phase change material and reducing degree of supercooling

Abstract

The invention relates to a heat storage phase change heat exchanger and a method for promoting crystallization of a sugar alcohol phase change material and reducing the degree of supercooling. A shell of the heat exchanger is composed of a metal shell body, a heat preservation layer and an insulation plastic cavity from outside to inside. A heat exchanger body in the insulating plastic cavity is filled with a sugar alcohol phase change heat storage material mixed with stearate, and an annular coil pipe which serves as a working medium runner and is insulated from the shell is further arranged in the heat exchanger body in the insulating plastic cavity. The areas, located in the liquid-phase sugar alcohol phase change heat storage material, of two ends of the heat exchanger body are respectively provided with an electrode, and the upper electrode and the lower electrode are respectively connected with an external impact-resistant alternating power supply. When the heat exchanger is electrified to release heat, disturbance of various sugar alcohol phase change materials can be promoted, the crystallization process of the sugar alcohol phase change materials is further promoted, and the degree of supercooling in the crystallization process can be obviously reduced.

Description

technical field [0001] The invention relates to the field of sugar-alcohol phase-change heat storage, and specifically discloses a heat-storage phase-change heat exchanger and a method for promoting crystallization of sugar-alcohol phase-change materials and reducing supercooling. Background technique [0002] Recycling waste heat resources increases energy efficiency while reducing environmental impact. For medium-temperature waste heat resources with a temperature of 200-400°C, low-grade thermal steam turbines and organic Rankine cycle power generation technologies are usually used for recycling. In contrast, the utilization rate of low-temperature waste heat resources below 200°C is lower. Using solar industrial waste heat as a heat source for winter heating can not only improve energy utilization efficiency, but also alleviate the increase in energy consumption caused by heating. Medium and low temperature heat energy such as industrial waste heat can be recovered and s...

AI Technical Summary

Problems solved by technology

[0003] The main technical problem to be solved by the present invention is to provide a method for promoting the crystallization of sugar alcohol phase change materials and reducing the degree of supercooling, to a certain extent alleviate the problem of difficult crystallization of sugar alcohols, and promote the utilization of sugar alcohols in phase change heat exchangers

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