Abstract
The present paper is suggested using waste heat of middle temperature region (100℃〜250℃) as heat source from factories. The purpose of this paper is comparing the melting and solidification characteristics of the mixture of mannitol and erythritol (C_M=70mass%, mannitol[70mass%]: erythritol[30mass%]) and mannitol as phase change materials (PCMs) in a direct-contact heat exchange type vessel. The experimental results show that the solidification behavior of the mixture of C_M=70mass% has a small porous area and the lower part of the porous solidification layer solidifies rapidly compared with mannitol. Furthermore as flow quantity of oil as a heat transfer medium increases, average heat release speed grows up.
