Journal
APPLIED THERMAL ENGINEERING
Volume 29, Issue 8-9, Pages 1778-1785Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2008.08.009
Keywords
Refrigerant mixture; Flow boiling; Heat transfer coefficient; Stratified flow; Stratified-wavy; HC blend; Multiple regression; Correlation
Funding
- Science and Engineering Research Council(SERC) - Department of Science and Technology (DST), New Delhi, India [SR/S3/MERC/61/2004-SERC Engg]
Ask authors/readers for more resources
An experimental study on in-tube flow boiling heat transfer of R-134a/R-290/R-600a refrigerant mixture has been carried out under varied heat flux test conditions. The heat transfer coefficients are experimentally measured at temperatures between -8 and 5 degrees C for mass flow rates of 3-5 g s(-1). Acetone is used as a hot fluid which flows in the outer tube of diameter 28.57 mm while the refrigerant mixture flows in the inner tube of diameters 9.52 and 12.7 mm. By regulating the acetone flow conditions, the heat flux is maintained between 2 and 8 kW/m(2) and the pressure of the refrigerant is maintained between 3.2 and 5 bar. The comparison of experimental results with the familiar correlations shows that the correlations over predict the heat transfer coefficients for this mixture when stratified and stratified-wavy flow prevail. Multiple regression technique is used to evolve and modify existing correlations to predict the heat transfer coefficient of the refrigerant mixture. It is found that the modified version of Lavin-Young correlation (1965) predicts the heat transfer coefficient of the considered mixture within an average deviation of +/- 20.5%. (C) 2008 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available