축열시스템 적용을 위한 MWCNT 첨가에 따른 스테아린산의 열전달 특성연구

When the phase change material(PCM) is used inside the heat storage tank, the storage capacity of energy per volume will be increased causing it to be miniaturized. The reason is that the PCM uses latent heat produced by the phase change. However, during the phase change process, the crystallization may occur on the surface of the pipe, which causes the reduction of heat transfer rate. The purpose of this experiment is to enhance the heat transfer by adding the MWCNT and Graphite to the existing PCM. In this study, the Stearic Acid Tech(SAT) was used as the PCM. Using this, inlet and outlet temperature differences are measured to evaluate the effect of MWCNT on the heat storage performance enhancement. It is found that Graphite is a better candidate than MWCNT for thermal storage application.