Abstract
Stearic acid (SA)/expanded graphite (EG) composite phase change material (PCM) was prepared through physical adsorption of SA to EG with mass ratios of SA varying from 6:1 to 11:1. The prepared composite PCM was characterized using scanning electron microscopy images, X-ray diffraction analysis, differential scanning calorimetry, and thermogravimetric analysis. A latent thermal energy storage system was used to measure the thermal cycling performance of the prepared composite PCM. The results show that when the composite PCM was prepared with 90 % SA, a high latent heat value and good thermal stability were achieved. Additionally, the heat transfer efficiency of both heat storage and heat retrieval was improved by the addition of EG.
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