21808 氷層剥離を伴う凝固熱伝達(明日に向けた熱と物質移動の新展開(2),OS.6 明日に向けた熱と物質移動の新展開)

抄録

This paper deals with an experimental study of ice piece separation on a cooling surface. We used 1wt% NaOH-water solution as a heat storage material. Gas bubbles were generated on the cooling surface by supplying DC current. The generated gas bubbles separated the ice pieces. We found that the generated gas bubbles could separate the ice pieces in an only range of temperature. Heat transfer coefficients with and without ice piece formation increased with increasing gas bubble generation rate. We also found that the heat transfer with ice pieces formation by the smooth cooling surface was more than the heat transfer with ice pieces formation by the rough cooling surface.