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: Contribution to conferencePaper

抜粋

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.

元の言語英語
出版物ステータス出版済み - 1 1 2018
イベント9th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2018 - Sapporo, Hokkaido, 日本
継続期間: 6 10 20186 13 2018

その他

その他9th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2018
日本
Sapporo, Hokkaido
期間6/10/186/13/18

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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  • これを引用

    Fukuda, S., Oishi, S., Tanoura, T., Miyazaki, T., Takata, N., & Koyama, S. (2018). Condensation heat transfer of R1234ze(Z) in the vertical channels. 論文発表場所 9th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2018, Sapporo, Hokkaido, 日本.