A study was conducted to experimentally characterize the pool boiling performance of hydrofluorocarbon HFC-245fa at pressures ranging from 0.15 MPa to 1.1 MPa (reduced pressure range: 0.04–0.31). Pool boiling experiments were conducted using horizontally oriented 1-cm2 heated surfaces to quantify the effects of pressure and a microporous-enhanced coating on heat transfer coefficients and critical heat flux (CHF) values. Results showed that the coating enhanced heat transfer coefficients and CHF by 430% and 50%, respectively. The boiling heat transfer performance of HFC-245fa was then compared with the boiling performance of HFC-134a and hydrofluoroolefin HFO-1234yf.
Effects of Pressure and a Microporous Coating on HFC-245fa Pool Boiling Heat Transfer
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received September 27, 2013; final manuscript received June 27, 2014; published online July 22, 2014. Assoc. Editor: W. Q. Tao. The United States Government retains, and by accepting the article for publication, the publisher acknowledges that the United States Government retains, a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this work, or allow others to do so, for United States government purposes.
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Moreno, G., Jeffers, J. R., and Narumanchi, S. (July 22, 2014). "Effects of Pressure and a Microporous Coating on HFC-245fa Pool Boiling Heat Transfer." ASME. J. Heat Transfer. October 2014; 136(10): 101502. https://doi.org/10.1115/1.4027966
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