Abstract
Pentaerythritol is a promising latent thermal storage material with transition temperature 188°C. Use of slurry of pentaerythritol and heat transfer oil (Hitherm PS-5) can enhance heat conduction in the storage material. In the present study, heat capacity and heat of transition were measured by differential scanning calorimetry on pentaerythritol and Hitherm PS-5. Thermal conductivities of Hitherm PS-5 and the slurry with 70 weight % of pentaerythritol were measured by the transient hot-wire method. The data of heat capacities and thermal conductivities were correlated by linear equations. The thermal conductivity of the slurry showed a discontinuity at the transition temperature due to a change in crystal structure.
