Paraffin wax is an effective thermal energy storage material which changes solid to liquid phase during charging mode and liquid to solid phase for discharging mode. In this paper, two types of paraffin wax ; paraffin A and B were examined by accelerating the 100 thermal cycles; heating and cooling to verify the thermal stability and degradation mechanism of the thermal property. Digital scanning calorimetry (DSC) was used for both paraffin waxes in order to investigate the variation in melting temperature and latent heat of fusion in the 0th and 100th thermal cycle. Paraffin A and B melting temperature were stable in 0th and 100th thermal cycle as well as no noticeable variation on paraffin A latent heat of fusion in preliminary investigation whereas paraffin B showed wide variation in latent heat of fusion from 0th and 100th charging mode which was from 130.0 J/g to 203.0 J/g. It was a massive enhancement on energy density. The results showed that the paraffin B enabled high energy density than paraffin A. However, paraffin A latent heat of fusion remained stable during the investigation as well as relatively 0.02 g material evaporation was noticed. From this investigation, it was found that both paraffin wax were suitable for low thermal application.
Volume 11 | 05-Special Issue
Pages: 1437-1443