Experimental study on static/circulatory flash evaporation

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• 作者：Yan Junjie ; Zhang Dan ; Chong Daotong ; Wang Guifang ; Li Luning
• 关键词：Flash evaporation ; Static ; Circulatory ; Non-equilibrium fraction ; Heat transfer coefficient
• 刊名：International Journal of Heat and Mass Transfer
• 出版年：2010
• 出版时间：November 2010
• 年：2010
• 卷：53
• 期：23-24
• 页码：5528-5535
• 全文大小：808 K

文摘

Comparative study on heat and mass transfer properties of static/circulatory flash evaporation, i.e., non-equilibrium fraction (NEF), evaporated mass and heat transfer coefficient, was presented based on two experimental systems. NEF evolution in static flash was newly fitted by error function equation, based on which a unified calculating model for heat and mass transfer properties of both flashes was set up initially. At last, heat transfer coefficient was redefined as average heat flux released from unit volume of waterfilm under unit superheat. Results suggested that this coefficient was a time-depended function and a peak value existed in its evolution versus time.