水‐油エマルションを用いた氷蓄熱のための容器内撹はん製氷　　臨界表面張力の小さな壁面材質の熱抵抗が製氷過程に与える影響について:臨界表面張力の小さな壁面材質の熱抵抗が製氷過程に与える影響について

概要

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A water-oil emulsion which is the mixture of silanol-aqueous solution and silicone oil was frozen in a vessel with stirring under various cooling temperatures. The cooling surfaces of the vessels were PTFE or PF A whose critical surface tension is relatively low. The effects of the wall thermal resistance on ice formation process were investigated. The relationship between the state of formed ice and cooling heat flux during freezing was c1arified. When the critical surface tension of the inner wall of the cooling surface is fixed, a smaller thermal resistance of wall enables the ice formation without ice adhesion to the surface at a higher ice formation rate. Ice can be formed without adhesion at the lower cooling temperature by using the vessel with a larger thermal resistance although the maximum cooling heat flux is relatively small. The maximum cooling heat flux decreases when the ratio of wall thermal resistance to overall thermal resistance before freezing is more than one half. It was shown that there were proper conditions to increase the cooling heat flux and that ice could be formed with high IPF under the proper conditions.
公益社団法人　日本冷凍空調学会の論文