Composite phase change heat storage material and preparation method thereof

A heat storage material and composite phase change technology, which is applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of low thermal conductivity and low heat storage performance, and achieve improved heat storage performance and good heat storage performance. Effect

Inactive Publication Date: 2022-03-11
青岛仟亿新材料科技有限公司
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the defects of low thermal conductivity of cetyl alcohol phase change material, resulting in low heat storage performance, and provide a phase change heat storage material that can quickly extract and store energy, and can make full use of the storage capacity of the phase change material Energy capacity, improve the heat storage performance of cetyl alcohol phase change material, and the composite phase change material provided by the invention has stable performance and good repeatability, and can be better applied to actual heat storage projects

Method used

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  • Composite phase change heat storage material and preparation method thereof

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[0022] The present invention also provides a method for preparing the above-mentioned composite phase change heat storage material, the preparation method comprising the following steps:

[0023] (1) After mixing expanded graphite and diatomaceous earth with liquid cetyl alcohol, heat and stir;

[0024] (2) After the heating and stirring are completed, vacuum adsorption is carried out under heating conditions to obtain a composite phase change heat storage material.

[0025] In the present invention, the step (1) is to stir at 80-90°C for 1-2h, preferably at 82-87°C for 1.3-1.8h.

[0026] In the present invention, the step (2) is vacuum adsorption at 80-90° C. for 2-3 hours, preferably stirring at 82-87° C. for 2.3-2.7 hours.

Embodiment 1

[0029] Weigh 80 parts of cetyl alcohol, 5 parts of expanded graphite, and 10 parts of diatomaceous earth, mix them and stir at 90°C for 2 hours; after the stirring is completed, vacuum adsorption at 90°C for 2 hours to obtain a composite phase change material .

Embodiment 2

[0031] Weigh 82 parts of cetyl alcohol, 7 parts of expanded graphite, and 8 parts of diatomaceous earth, mix them and stir at 84°C for 1.4h; after the stirring is completed, vacuum adsorption at 83°C for 2.5h to obtain a composite phase change material.

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Abstract

The invention relates to the technical field of phase change heat storage materials, in particular to a composite phase change heat storage material and a preparation method thereof. The composite phase change heat storage material comprises the following components: hexadecanol, expanded graphite and diatomite. The preparation method of the composite phase change heat storage material comprises the following steps: (1) mixing expanded graphite, diatomite and liquid hexadecanol, and heating and stirring; (2) after heating and stirring are finished, under the heating condition, vacuum adsorption is performed, and the composite phase change heat storage material is obtained. The phase-change heat storage material can rapidly extract and store energy, the energy storage capacity of the phase-change material can be fully utilized, the heat storage performance of the hexadecanol phase-change material is improved, the heat conductivity coefficient is increased by 5.18-5.7 times compared with that of hexadecanol, and the heat conductivity coefficient is increased by 46.52% to the maximum compared with that of a composite phase-change material only added with expanded graphite. And the composite phase change material provided by the invention is stable in performance and good in repeatability, and can be better applied to actual heat storage engineering.

Description

technical field [0001] The invention relates to the technical field of phase change heat storage materials, in particular to a composite phase change heat storage material and a preparation method thereof. Background technique [0002] Heat storage technology is an important technology to improve energy utilization efficiency and protect the environment. It can be used to solve the contradiction between thermal energy supply and demand mismatch. It has broad application prospects in fields such as energy saving of air conditioners and air conditioners. Latent heat storage (phase change heat storage) uses the principle that substances absorb or release latent heat of phase change during solidification / melting, condensation / gasification, condensation / sublimation and other forms of phase change for energy storage. technology. [0003] The property of phase change materials to absorb or release latent heat during a phase change can be used to store heat or cold and control tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 李雪真张爱民韩涛
Owner 青岛仟亿新材料科技有限公司
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