Prediction of film boiling heat transfer coefficients for binary mixtures |
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Authors: | Ming-Huei Liu Yu-Min Yang Jer-Ru Maa |
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Institution: | Chemical Engineering Department, National Cheng Kung University, Tainan, Taiwan 70101, Republic of China, TW
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Abstract: | Film boiling of binary liquid mixtures may be significantly different from that of single-component liquids due to the mass diffusion effect. A theoretical analysis is performed to outline the effects of mass diffusion phenomena on film boiling heat transfer process from a horizontal cylinder heating surface to the binary liquid mixtures of ethylene oxide/water and ethanol/benzene over whole range of compositions. These two binary systems are chosen for illustrating the strong and weak mass diffusion effects, respectively, on film boiling. Furthermore, a simple correlation for predicting heat transfer coefficient is proposed to demonstrate the idea that the dimensionless F factor can satisfactorily account for the mass diffusion effect on film boiling heat transfer of binary mixtures. |
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