Heat Transfer Enhancement in Horizontal, Spirally Grooved Evaporator Tubes

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概要

• 論文の詳細を見る

• Experimental data of the circumferentially local heat transfer coefficient as well as the circumferentially averaged coefficient were obtained for R-22 and R-12 flowing at mass velocities of 50 to 500 kg/(m^2・s), in three types of spirally grooved evaporator tubes oriented horizontally. The heat transfer in the grooved tubes was found to be effectively enhanced over a smooth tube at mass velocities lower than 100kg/(m^2・s), but, as the mass velocity increased, the enhancements were rapidly reduced, and then the heat transfer coefficients gradually approached the value in a smooth tube, a simplified model, which took account of the heat transfer through the meniscus liquid film in the grooves, was developed, and thereby the heat transfer characteristics in the grooved tube were explained.

• 一般社団法人日本機械学会の論文
• 1988-08-15

著者

• MATSUNAGA Takashi

  Department of Medical Informatics, Osaka Medical Center for Cancer and Cardiovascular Diseases

• YOSHIDA Suguru

  Department of Material Chemistry, Graduate School of Engineering, Kyoto University

• Yoshida Suguru

  Department Of Energy And Mechanical Engineering Kyushu University

• Yoshida Suguru

  Department Of Mechanical Engineering Power Division Kyushu University

• Hong Hai-ping

  Department Of Mechanical Engineering Power Division Kyushu University

• NISHIKAWA Kaneyasu

  Kurume College of Technology

• Yoshida Suguru

  Department 4. Technology Research Division 2. Automobile R&d Center Honda R&d Co. Ltd.

• Matsunaga Takashi

  Department Of Medical Informatics Osaka Medical Center For Cancer And Cardiovascular Diseases

• Matsunaga Takashi

  Department Of Biopharmaceutics Faculty Of Pharmaceutical Sciences Chiba University

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