Thermal performance of high melting points paraffin emulsions for latent heat transportation

To match the temperature range of central heating systems,several types of commercial grade paraffin with melting points have been investigated as the candidate phase change material(PCM).And the thermal behavior of the paraffin was tested.According to the phase change temperature difference and heat of fusion,the paraffin with the melting point at 87℃,latent heat of 203.9J/g,phase change temperature range of 80-90℃ was selected as the best phase change material.Paraffin emulsions were prepared by mixing non-ionic surfactants and co-surfactants.Thermal physical properties of these paraffin emulsions such as phase transition temperature and latent heat were tested.Because paraffin emulsions can store their latent heat during phase change process in the temperature range of 80-90℃,their heat storage density their and heat carrier density are higher than water.Based on that,paraffin emulsions are suitable for latent heat transportation.