Study on Effect of Addition of PCM (Phase-change Material) on Heat-transfer Property of Hot Water Heating Wallboard

This paper studied application effect of phase change materials in active energy storage; through the establishment of radiant heating experimental system of low temperature hot water PCM wallboard and ordinary hot water phase wallboard,the experiment tested heat-transfer properties of radiant heating PCM wallboard and ordinary wallboard in the intermitting heating process,including surface temperature and surface heat flow of wallboard,and meanwhile,finite element analysis software was used for numerical simulation of heat transfer processes of the above two kinds of wallboards in the intermitting heating process. Results showed that: during the heating phase,surface temperature and heat flow of PCM wallboard were lower than those of ordinary wallboard; after heating was stopped,decline rates of surface temperature and heat flow of PCM wallboard were significantly lower than those of ordinary wallboard;after heating was stopped,certain heat flow and temperature were still maintained at the PCM wallboard surface for indoor heating,and no greater fluctuation happened to indoor temperature; Experimental results were consistent with numerical simulation results in most cases. The results of this study can provide reference and basis for the application of hot water heating PCM wallboard in buildings.