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Composite phase change heat storage system with built-in electric heating and preparation method of composite phase change body

A technology of composite phase change and heat storage system, which is applied in the field of composite phase change heat storage system with built-in electric heating and the preparation of composite phase change body, which can solve the problems of large heat transfer resistance, low heat transfer efficiency, and short service life , to improve the heat transfer efficiency, facilitate the outward transfer of heat, and solve the effect of low heat transfer efficiency

Active Publication Date: 2021-07-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of short service life due to phase separation and low heat transfer efficiency due to the large heat transfer resistance of the existing phase change heat storage electric heating system, and propose a built-in electric heating system Composite phase change heat storage system and preparation method of composite phase change body

Method used

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  • Composite phase change heat storage system with built-in electric heating and preparation method of composite phase change body
  • Composite phase change heat storage system with built-in electric heating and preparation method of composite phase change body
  • Composite phase change heat storage system with built-in electric heating and preparation method of composite phase change body

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specific Embodiment approach 2

[0063] Embodiment 2: This embodiment is different from Embodiment 1 in that the housing 1 is made of high thermal conductivity insulating material, and the wall thickness of the housing 1 is no more than 2mm.

specific Embodiment approach 3

[0064] Embodiment 3: This embodiment differs from Embodiment 2 in that the high thermal conductivity insulating material refers to epoxy resin, rubber, and ceramics filled with metal oxides, metal nitrides, or metal carbides.

specific Embodiment approach 4

[0065] Embodiment 4: This embodiment is different from Embodiment 1 in that, in the cavity of the housing 1 , the spiral heating element 2 has a structure of dense top and sparse bottom.

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Abstract

The invention relates to a composite phase change thermal storage system with built-in electric heating and a preparation method of a composite phase change body, belonging to the technical field of phase change energy storage. The invention solves the problems of phase separation and large heat transfer resistance in the existing phase change thermal storage electric heating system. The invention prepares a porous medium with non-uniform pores, uses pores of different sizes to constrain crystal hydrated salts with different degrees of phase separation, and solves the problem of phase separation; a spiral heating coil is preset in the porous medium to realize the heating element and heat storage layer The integration can make the heat transfer to the surrounding phase change materials in a timely and efficient manner, and improve the heat transfer efficiency at the heat source level; by filling two layers of phase change materials with different phase transition temperatures, the upper phase transition temperature is low and the lower phase transition temperature is low. The high temperature space feature prevents the upper liquid phase change material from solidifying first for heat insulation, which is conducive to the outward transfer of heat from the heat storage layer, and improves the efficiency of external heat transfer on the heat storage layer. The invention can be applied to the technical field of phase change energy storage.

Description

technical field [0001] The invention belongs to the technical field of phase change energy storage, and in particular relates to a composite phase change heat storage system with built-in electric heating and a preparation method for a composite phase change body. Background technique [0002] Phase change energy storage is an advanced heat storage technology. It uses phase change energy storage technology for electric heat storage during off-peak hours, and applies electric heat storage to building heating. Great value. However, most of the phase change heat storage electric heating systems have the following defects: [0003] (1) Crystal hydrated salt is a commonly used inorganic phase change energy storage material. It stores and releases heat by releasing and absorbing crystal water during melting and solidification, and dehydration and water absorption are both gradual processes. When the temperature rises , the crystallization water released by it is not enough to di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24D13/02F24D15/02F28D20/02C09K5/06
CPCC09K5/063F24D13/02F24D15/02F24D2200/08F28D20/023Y02E60/14Y02E70/30Y02P20/10
Inventor 谭羽非张文盛白莉张甜甜龙康韩东亮
Owner HARBIN INST OF TECH
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