graphite for thermal energy storage (original) (raw)

2014

Abstract

Stearic acid/coffee grounds composites with graphite as thermal energy storage materials were prepared using impregnation methods. In the composites, coffee grounds acted as the supporting material, and stearic acid is selected as the phase change material (PCM) due to the desirable thermal properties to the thermal storage by latent heat. Nevertheless, it has a major disadvantage of the low thermal conductivity. In order to improve conduction heat property of the composites, graphite was added in the composites. Fourier transformation infrared spectroscope (FT-IR), and scanning electronic microscope (SEM) were used to determine chemical structure, microstructure of stearic acid/coffee grounds composites, respectively. The thermal properties, such as phase change temperature and latent heat, were investigated by a differential scanning calorimeter (DSC). Thermal conductivity was determined by a Hot disk Method. The SEM results showed that stearic acid was well dispersed in the porou...

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