Abstract
AbstractOwing to the intermittent nature of solar energy, the thermal energy from the sun or waste heat can be stored in the form of latent heat in a packed bed of phase change material (PCM). In this article, PCM‐based latent heat thermal energy storage is experimentally investigated, and the effects of porosity and specific surface area (ratio of surface area to the volume of the encapsulation) on the charging and discharging times are evaluated in packed bed thermal energy storage. Locally available paraffin wax was utilized as PCM. Differential scanning calorimetry (DSC) was used to investigate the thermal properties of paraffin wax. Enthalpy of phase change, melting point, and specific heat capacity of the paraffin wax were obtained by using DSC. Experimental results revealed that there was a 17% decrease in the charging time when porosity was reduced from 0.568 to 0.485, and the corresponding surface area was 2.581 and 3.4546 m2/m3, respectively.
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