Dr. Kai Jiao is currently a Post-Doctoral Researcher at the Hong Kong Polytechnic University, HK, focusing on theoretical research on phase change energy storage of paraffin and participating in the development of paraffin thermal storage units for novel photovoltaic/thermal systems. Dr. Jiao has extensive experience in heat transfer analysis of paraffin and its composites. During his doctoral studies, he established a paraffin phase change heat transfer model based on the mixture theory, which allows for accurate prediction of the phase change process of paraffin and its composites.