TY - JOUR
T1 - A correlation for forced convective boiling heat transfer of pure refrigerants in a horizontal smooth tube
AU - Takamatsu, H.
AU - Momoki, S.
AU - Fujii, T.
N1 - Funding Information:
Acknoi~~ic~~~e~ttWli.Fs-tTuhdiys was partly supported by the Ministry of Education. Science and Culture, Japan through the Gent-an-Aid for Scientific Research on Priority Areas, Energy Conversion and Utilization with High Efficiency (No. 01603022).T heauthors acknowledge Daikin Industries, Ltd. for their support in the construction of the present experimental apparatus. The authors also thank Dr Sh. Koyama for his contribution in the design of the experimental apparatus and Mr S. Hiraoka and H. Shintaku for their contribution in the experiment. Finally, the authors would like to acknowledge Professor Suguru Yoshida at Kyushu University who gave us some unpubtished experimental data for comparison with the present correlation.
PY - 1993/9
Y1 - 1993/9
N2 - An experimental study is reported on the boiling heat transfer of HFC134a, HCFC22, CFC114 and CFC12 flowing inside a 7.9 mm ID horizontal smooth tube. Using a water-heated, double-tube type evaporator, the local heat transfer coefficients are measured for both counter and parallel flows. Based on the supposition of Chen that the total heat flux is represented as the sum of forced convective contribution and nucleate boiling contribution, a correlation equation is proposed for the data in the annular-flow regime. The mean deviation between the calculated and measured heat transfer coefficients is 12.2% for the present experimental data and 9.5% for the data available from literature. The proposed correlation shows that the nucleate boiling is not fully suppressed even in the high-quality region in the case of counter flow, while convective evaporation is dominant in the high-quality region with uniform heat flux condition.
AB - An experimental study is reported on the boiling heat transfer of HFC134a, HCFC22, CFC114 and CFC12 flowing inside a 7.9 mm ID horizontal smooth tube. Using a water-heated, double-tube type evaporator, the local heat transfer coefficients are measured for both counter and parallel flows. Based on the supposition of Chen that the total heat flux is represented as the sum of forced convective contribution and nucleate boiling contribution, a correlation equation is proposed for the data in the annular-flow regime. The mean deviation between the calculated and measured heat transfer coefficients is 12.2% for the present experimental data and 9.5% for the data available from literature. The proposed correlation shows that the nucleate boiling is not fully suppressed even in the high-quality region in the case of counter flow, while convective evaporation is dominant in the high-quality region with uniform heat flux condition.
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U2 - 10.1016/0017-9310(93)90016-Y
DO - 10.1016/0017-9310(93)90016-Y
M3 - Article
AN - SCOPUS:0027657727
SN - 0017-9310
VL - 36
SP - 3351
EP - 3360
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
IS - 13
ER -