Abstract
An experimental investigation was conducted to determine the heat transfer characteristics of HCFC-22 for a two-phase double tube connected to a heat pump. This study focussed on the forced convection boiling heat transfer of small flow rate in a double tube. It was clarified that the quality at the dry-out point increases as mass velocity increases, and that the heat transfer coefficient of two-phase flow is about 30 times as large as that of the liquid single-phase laminar flow. Furthermore, it was found that the heat transfer performance of the double tube is superior to that of a single tube.
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