Condensation heat transfer of R1234ze(Z) in the vertical channels

Sho Fukuda, Shohei Oishi, Teppei Tanoura, Takahiko Miyazaki, Nobuo Takata, Shigeru Koyama

研究成果: 会議への寄与タイプ学会誌査読

1 被引用数 (Scopus)


Recently, the development of high temperature heat pump systems for heat recovery from industrial waste heat below 100 °C is one of important subjects in order to reduce primary energy consumption. However, in order to develop such systems, it is indispensable to use an environmentally acceptable refrigerant, highly efficient heat exchangers and highly efficient compressors. From this viewpoint, in the present study, the condensation of low GWP refrigerant R1234ze(Z) in vertical channels is investigated experimentally in order to establish optimum design method of plate-fin heat exchanger. Two type of fins are used in the experiment, one is plane fin, another one is serrated fin. In the test channel, the test refrigerant flows downward, while the compressed cooling water flows upward. The local heat transfer characteristics are measured using thermocouples, heat flux sensors and pressure transducers. Also, the experimental results are compared with correlation equation that are composed free convection condensation. As the results, it clarified that heat transfer characteristic in plate fin heat exchanger are different according to difference in fin shapes. The heat transfer characteristics in plate-fin heat exchanger, at low quality area, are phenomenon that is near to free convection condensation.

出版ステータス出版済み - 2018
イベント9th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2018 - Sapporo, Hokkaido, 日本
継続期間: 6月 10 20186月 13 2018


その他9th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2018
CitySapporo, Hokkaido

!!!All Science Journal Classification (ASJC) codes

  • 制御およびシステム工学
  • 凝縮系物理学
  • 電子工学および電気工学
  • 機械工学


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