Abstract
The composite phase change material was prepared via the impregnation method using diatomaceous as the carrier and stearic acid as the phase change material. The effects of diatomite content, temperature, immersion time and pressure on the mass ratio of stearic acid and diatomaceous earth in the composite phase change materials were discussed. The experimental results showed that the optimum conditions for preparing stearic acid/diatomite composite phase change material were immersion temperature of 80℃, socking time of 2 h, diatomite mass fraction of 23.04%, and vacuum degree of 0.03 MPa. Finally, the infrared spectroscopy analysis of stearic acid/diatomite composite phase change energy storage material showed that there is no chemical reaction between stearic acid and diatomite. And they are held together by intermolecular forces.
Highlights
With the rapid development of industry, the supply of fossil energy is insufficient
Inorganic phase change materials are extremely corrosive and inconvenient to use they have high thermal conductivity and good heat transfer effect
We studied the effects of diatomite content, temperature, immersion time and pressure on the mass ratio of stearic acid and diatomaceous earth in the composites and the combination of stearic acid and diatomite
Summary
With the rapid development of industry, the supply of fossil energy is insufficient. In recent years, more and more people have begun to study phase change materials in order to alleviate the energy crisis, since phase change materials can exchange energy with its surroundings during phase change[1]. The single phase change materials include inorganic phase change materials and organic phase change material. Inorganic phase change materials are extremely corrosive and inconvenient to use they have high thermal conductivity and good heat transfer effect. Organic phase change materials have high latent heat of phase change and stable performance. They have low thermal conductivity and poor heat transfer effect. The composite phase change materials are composed of phase change materials and carrier materials, which have high thermal conductivity and stability[4]. Diatomite is a natural mineral raw material It has the advantages of large specific surface area, high chemical stability and lower price than activated carbon[5]. We studied the effects of diatomite content, temperature, immersion time and pressure on the mass ratio of stearic acid and diatomaceous earth in the composites and the combination of stearic acid and diatomite
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