Novel low-temperature phase-change thermal storage material and preparation method thereof

Abstract

The invention discloses components of a phase-change thermal storage material and a preparation method of the phase-change thermal storage material. The phase-change thermal storage material consists of semi-refined No.58 industrial paraffin as a main material, and dodecanoic acid (lauric acid) as an additive. The preparation process comprises the following steps that: the semi-refined No.58 industrial paraffin is melted by heating at a temperature of 56 DEG C to 68 DEG C, and the dodecanoic acid (lauric acid) as the additive is added after the paraffin is completely melted, and is uniformly stirred; a mixture is re-heated to raise the temperature in the stirring process, so that the mixture is fully and uniformly stirred into a fluid shape; and finally, the fluid-like product is poured into a container to be encapsulated. The low-temperature phase-change thermal storage material provided by the invention has the advantages that the phase-change latent heat is high, the phase-change temperature is between 54 DEG C and 57 DEG C, as proved by repeated tests, the performance is stable, and the phase separation phenomenon cannot occur, and the like.

Description

technical field [0001] The invention belongs to the technical field of heat storage, and in particular relates to a new low-temperature phase change heat storage material and a preparation method thereof. Background technique [0002] Thermal storage can solve the waste caused by the mismatch between thermal energy supply and demand in time and space. Thermal storage technology has been widely used in air conditioning, heating and other fields. With the deepening of research, thermal storage materials have gradually entered ecological buildings, etc. Emerging fields. Because the phase change heat storage material uses the inherent heat capacity of the material and the phase change heat of the state change to store thermal energy at the same time, it has a large heat storage density, and the research and application in this area have developed rapidly in recent years. [0003] The current research on phase change thermal storage materials is mainly divided into two direction...

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Problems solved by technology

[0004] At present, relevant researchers at home and abroad have done some work in this area and developed some phase change heat storage materials, some of which have been put into actual production and application, but there are still many problems: such as unstable performance, especially after a period of use Phase separation occurs; the phase change temperature of the developed phase change heat storage material is not suitable, resulting in too narrow use

At present, phase change materials in this temperature range are relatively vacant

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