Phase change heat storage material with multiple phase change points and preparation technology thereof

Abstract

The invention discloses a phase change heat storage material with multiple phase change points. The material is prepared by compounding at least two phase change materials with different phase change temperatures and then adding a stabilizing agent. In the material compounding step, phase change materials are added into a reactor according to the phase change temperatures, materials with lower phase change temperatures are added into the reactor at first, the phase change materials are melted and stirred in the reactor, and after the phase change materials are fully stirred, a stabilizing agent is added. The invention further discloses a preparation technology of the phase change heat storage material. The preparation technology comprises the following steps: preparing a first phase change material, preparing a second phase change material and a stabilizing agent; adding the first phase change material into the reactor, heating the first phase change material until the first phase change material is completely melted, stirring; adding the second phase change material into the reactor, stirring; adding the stabilizing agent into the reactor, stirring; and carrying out DSC tests to obtain a phase change material with multiple phase temperature points. The phase change material can be applied to specific fields such as a heat accumulating type solar hot water system, the sunshine states in winter and summer can be adapted effectively, the energy is effectively utilized, and the heat supply efficiency of the hot water system is improved.

Description

technical field [0001] The invention relates to a phase change thermal storage material with multiple phase transition points and a preparation process thereof, in particular to a phase change thermal storage material with two phase transition temperature points in the same material and a preparation process thereof. Background technique [0002] There are many types of existing phase change materials, and many research institutions and enterprises have carried out a lot of research and development work, but there are not many phase change materials that can be commercialized, mainly due to the limitation of the heat storage density and stability of the materials themselves. . [0003] Phase change materials have great application space in the field of solar energy, especially for solar water heater systems. Now there is a tankless solar water heater on the market, also known as a phase change thermal storage solar water heater, which uses highly efficient phase change ther...

AI Technical Summary

Problems solved by technology

[0004] The key to the phase change heat storage solar water heater technology lies in the phase change heat storage material, but the heat storage density of the phase change material that can be applied to the solar water heater is relatively low, and the temperature of the phase change heat storage is single, which cannot take into account the amount of sunshine in summer and winter at the same time. The inability to effectively improve solar heat collection efficiency is the main factor limiting the application of phase change materials

[0005] Therefore, how to solve the single problem of the phase transition temperature of phase change materials is the direction that those skilled in the art are committed to research.

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