Tuning Effect of Porous Structure on Phase Changing Behavior of Organic Phase Changing Matters

Four different kinds of porous media were used as the storing matrix for organic phase changing matters.The storage and phase changing features of organic phase changing matters in the porous media were studied experimentally,and the tuning effect of the porous structure on the phase changing behaviors of organic phase changing matters are analyzed.For relative pure organic phase changing matter,the phase changing temperature range is widened by the porous structure,and the phase changing temperature moves to the direction of higher temperature at a pace which is proportional approximately to the volume fraction of organic phase changing matter in porous media.But for impure organic phase changing matter,the tuning effect is rather complicated,even contrary.