Comparative investigation on the spray characteristics and heat transfer dynamics of pulsed spray cooling with volatile cryogens

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• 作者：Zhi-Fu Zhou^a ; Bin Chen^a ; ^{chinbin@mail.xjtu.edu.cn} ; Rui Wang^a ; Guo-Xiang Wang^a ; ^b
• 关键词：Cryogen spray cooling ; Spray characteristics ; Heat transfer dynamics ; R404A ; Laser dermatology
• 刊名：Experimental Thermal and Fluid Science
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：82
• 期：Complete
• 页码：189-197
• 全文大小：1107 K
• 卷排序：82

文摘

Spray and heat transfer of R134a, R407C and R404A spray cooling are compared. R404A produces the smallest diameter and largest velocity of droplets. Smaller spray width and better selectively spatial cooling are achieved by R404A. R404A produces far lower temperature and larger heat flux than R134a and R407C. R134a can be replaced by R404A for its better cooling effect in laser surgery.