Heat storage device and method for inhibiting supercooling degree of sugar alcohol phase change heat storage material

Abstract

The invention belongs to the technical field of heat storage, and particularly relates to a method and device for inhibiting the supercooling degree of an erythritol phase change heat storage material. According to the invention, low-temperature nitrogen bubbles are used as a cold source and are pumped into the supercooled erythritol, and the erythritol on the surfaces of the bubbles is rapidly cooled to form a huge temperature difference locally, so the erythritol on the surfaces has enough potential energy to overcome intermolecular hydrogen bond acting force; and therefore, the supercooled erythritol in the heat storage device is induced to be solidified and to release heat by virtue of crystal nucleuses formed by mutual aggregation. The device comprises a nitrogen generating device, a nitrogen cooling device, a nitrogen atomizing device and the like. The nitrogen generating device is used for generating nitrogen needed in the method, the generated nitrogen firstly enters the nitrogen cooling device, and the nitrogen cooling device cools the nitrogen to 15 DEG C or below and is used for strengthening inhibition effect on supercooling behaviors. The nitrogen atomizing device is used for atomizing nitrogen in a pipeline into small bubbles, so a plurality of inducible freezing points exist in the erythritol, and a solidification rate and a heat release rate are accelerated.

Description

technical field [0001] The invention belongs to the technical field of phase change heat storage materials, and in particular relates to a heat storage device and a suppression method that can be used to suppress the supercooling degree of sugar alcohol phase change heat storage materials. Background technique [0002] In order to achieve the "double carbon" goal, the use of medium and low temperature industrial waste heat for domestic heating through phase change heat storage can effectively reduce the consumption of fossil energy. As a food additive, erythritologen has attracted much attention in the field of medium and low temperature phase change heat storage due to its phase transition temperature suitable for medium and low temperature waste heat utilization and ultra-high melting enthalpy. [0003] However, in the actual heat storage process, erythritol, as a polyhydroxy compound, has a more serious supercooling behavior due to the strong intermolecular hydrogen bond ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problem that the supercooling behavior of erythritol makes it unable to release latent heat in the application as a phase change heat storage material, the present invention proposes a heat storage device for suppressing the supercooling degree of sugar alcohol phase change heat storage materials and method

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