Boiling heat transfer correlations for refrigerant
mixtures flowing inside micro-fin tubes |
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Authors: | ZHANG Xiaoyan ZHANG Xingqun CHEN Yunguang YUAN Xiuling |
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Affiliation: | 1.School of Energy Engineering, Xi'an University of Science and Technology; 2.School of Energy and Power Engineering, Xi'an Jiaotong University; |
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Abstract: | Based on experimental results of ternary non-azeotropic refrigerant mixture R417A flowing and boiling in one smooth and two internally grooved horizontal tubes with different geometrical parameters, a boiling heat transfer correlations was developed for refrigerant mixtures flowing inside micro-fin tubes by applying the enhancement factor in the present modified-Kattan model which was modified by the experimental data of R417A in a smooth tube. The comparison between the calculation and the experimental results indicates that the prediction by the present correlations is in good agreement with the experiment of refrigerant mixtures inside different micro-fin tubes with a standard deviation of ± 30% for vapor qualities below 80%. |
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