新冷媒対応技術 新規冷媒ＨＦＥ‐２４５ｍｃの水平管内沸騰・凝縮熱伝達
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概要
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A new refrigerant HFE-245mc (CF<SUB>3</SUB>CF<SUB>2</SUB>OCH<SUB>3</SUB>) is expected being a possible candidate to replace CFC-114 especially for waste heat recovery heat pump systems. HFE-245mc has zero ozone depletion potential and also much smaller global warming potential. In the present study, experiments were made on boiling and condensation heat transfer for HFE-245mc flowing inside a horizontal smooth tube. Measured local heat transfer coefficients agreed well with the values estimated from the respective correlations for boiling and condensation of conventional refrigerants. There was found no peculiar difference from conventional refrigerants in the characteristics of boiling and condensation heat transfer. Comparing the values calculated from the correlations, the heat transfer for HFE-245mc showed to be better than or equal to that of CFC-114 in boiling and condensation, and therefore, from the standpoint of heat transfer, there was no problem in the use of HFE-245mc as the alternative refrigerant to CFC-114.
- 公益社団法人 日本冷凍空調学会の論文
公益社団法人 日本冷凍空調学会 | 論文
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