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Title: Nucleate pool boiling of R-245fa at low saturation temperatures for hydrogen precooling applications

Journal Article · · International Journal of Heat and Mass Transfer

In this study, experiments were conducted to measure the pool boiling performance of saturated R-245fa at low saturation temperatures (-30 degrees C, -40 degrees C, and -50 degrees C). Horizontally oriented cylindrical heat sources were used as the test samples and were intended to simulate a small section of a hydrogen-filled tube. Measurements evaluated the effects of saturation temperature and two microporous coatings on heat transfer coefficients (HTC), critical heat flux (CHF), and boiling incipient superheat. Results show that boiling performance decreases as the saturation temperature reduces - a result of less active nucleation sites and higher vapor coverage of the heated surface at lower temperatures. Microporous coatings increased HTCs and CHF values, but did not have a significant effect on reducing the boiling incipient superheat. Finally, the experimental results were used to develop correlations for nucleate pool boiling on plain and microporous surfaces that can be used to predict HTCs and CHF values at low saturation temperature conditions (down to -50 degrees C).

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE; Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1489325
Alternate ID(s):
OSTI ID: 1775812
Report Number(s):
NREL/JA-5400-72625
Journal Information:
International Journal of Heat and Mass Transfer, Vol. 132, Issue C; ISSN 0017-9310
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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  • You, S. M.; Bar-Cohen, A.; Simon, T. W.
  • IEEE Transactions on Components, Hybrids, and Manufacturing Technology, Vol. 13, Issue 4 https://doi.org/10.1109/33.62545
journal January 1990

Cited By (1)

Test 1 EDITED
  • Agresta, Ronald
  • Office of Scientific and Technical Information, Oak Ridge, TN; 123123123 (TestAuthority); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States) https://doi.org/10.11578/1721336
dataset January 2016