414 直接接触熱交換による単一液滴の蒸発・凝固(蓄熱技術)(空気調和・冷凍技術)

概要

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There is a jump in the demand of LNG (liquefied natural gas) as alternative energy of oil. When LNG is vaporized, it releases a great number of cold energy. From the energy saving viewpoint, the utilization of LNG cold energy is very important for the refrigeration industry concerning low temperature region. As the purpose of the utilization of LNG cold energy, the heat storage system with phase change due to direct contact has been considered. In this system, the cold energy of LNG transfers directly to the bulk with freezing. Accordingly, two phase changes of evaporation of LNG and freezing of the bulk is occurred at the same time. The liquid-liquid direct contact heat transfer with evaporation has been investigated theoretically and experimentally, using a R134a drop injected into water. The calculated results agree with the experimental results for the contact evaporation state.
社団法人日本機械学会の論文
2001-07-09