Experiments are carried out here to measure the evaporation heat transfer coefficient and associated frictional pressure drop in a vertical plate heat exchanger for refrigerant R-410A. The heat exchanger consists of two vertical counterflow channels which are formed by three plates whose surface corrugations have a sine shape and a chevron angle of 60 deg. Upflow boiling of refrigerant R-410A receives heat from the hot downflow of water. In the experiments, the mean vapor quality in the refrigerant channel is varied from 0.10 to 0.80, the mass flux from 50 to 100 and the imposed heat flux from 10 to 20 for the system pressure fixed at 1.08 and 1.25 MPa. The measured data indicate that both and increase with the refrigerant mass flux except at low vapor quality. In addition, raising the imposed heat flux is found to significantly improve for the entire range of the mean vapor quality. However, the corresponding friction factor is insensitive to the imposed heat flux and refrigerant pressure. Based on the present data, empirical correlations are provided for and for R-410A in the plate heat exchanger.
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Technical Papers
Evaporation Heat Transfer and Pressure Drop of Refrigerant R-410A Flow in a Vertical Plate Heat Exchanger
Y. Y. Hsieh,
Y. Y. Hsieh
Department of Mechanical Engineering, National Chaio Tung University, Hsinchu, Taiwan, R.O.C.
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T. F. Lin
T. F. Lin
Department of Mechanical Engineering, National Chaio Tung University, Hsinchu, Taiwan, R.O.C.
Search for other works by this author on:
Y. Y. Hsieh
Department of Mechanical Engineering, National Chaio Tung University, Hsinchu, Taiwan, R.O.C.
T. F. Lin
Department of Mechanical Engineering, National Chaio Tung University, Hsinchu, Taiwan, R.O.C.
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division April 24, 2001; revision received July 25, 2002. Associate Editor: M. K. Jensen.
J. Heat Transfer. Oct 2003, 125(5): 852-857 (6 pages)
Published Online: September 23, 2003
Article history
Received:
April 24, 2001
Revised:
July 25, 2002
Online:
September 23, 2003
Citation
Hsieh , Y. Y., and Lin , T. F. (September 23, 2003). "Evaporation Heat Transfer and Pressure Drop of Refrigerant R-410A Flow in a Vertical Plate Heat Exchanger ." ASME. J. Heat Transfer. October 2003; 125(5): 852–857. https://doi.org/10.1115/1.1518498
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