DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

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:
Laboratory Directed Research and Development (LDRD) Program; USDOE
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1489325
Report Number(s):
NREL/JA--5400-72625
Journal Information:
International Journal of Heat and Mass Transfer, Journal Name: International Journal of Heat and Mass Transfer Journal Issue: C Vol. 132; ISSN 0017-9310
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (27)

The peak pool boiling heat flux on horizontal cylinders journal September 1970
Boiling from small cylinders journal November 1972
Experimental investigation of nucleate boiling incipience with a highly-wetting dielectric fluid (R-113) journal January 1990
Nucleate pool boiling data for five refrigerants on plain, integral-fin and enhanced tube geometries journal August 1992
Nucleate pool boiling from coated surfaces in saturated R-134a and R-407c journal February 1997
Effect of pressure, subcooling, and dissolved gas on pool boiling heat transfer from microporous, square pin-finned surfaces in FC-72 journal January 2003
Experimental study of nucleate boiling of halocarbon refrigerants on cylindrical surfaces journal November 2003
Boiling of new refrigerants: a state-of-the-art review journal September 1996
Nucleate boiling of pure and quasi-azeotropic refrigerants from copper coated surfaces journal February 2016
Local heat transfer coefficients and pressure gradients for R-134a during flow boiling at temperatures between −9°C and +20°C journal July 2009
Fluid flow and heat transfer characteristics of low temperature two-phase micro-channel heat sinks – Part 1: Experimental methods and flow visualization results journal August 2008
Fluid flow and heat transfer characteristics of low temperature two-phase micro-channel heat sinks – Part 2. Subcooled boiling pressure drop and heat transfer journal August 2008
Nucleate boiling of low GWP refrigerants on highly enhanced tube surface journal May 2016
Nucleate boiling heat transfer coefficients of flammable refrigerants journal June 2004
Pool boiling data and prediction method for enhanced boiling tubes with R-134a, R-236fa and R-1234ze(E) journal March 2013
Prediction methods for pool boiling heat transfer: A state-of-the-art review journal July 2014
Comparative assessment of condensation and pool boiling heat transfer on horizontal plain single tubes for R1234ze(E), R1234ze(Z), and R1233zd(E) journal March 2016
Pool boiling heat transfer of R134a on single horizontal tube surfaces sintered with open-celled copper foam journal November 2011
Pool boiling characteristics and critical heat flux mechanisms of microporous surfaces and enhancement through structural modification journal August 2017
Boiling incipience and nucleate boiling heat transfer of highly wetting dielectric fluids from electronic materials
  • 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
Parametric Study of Pool Boiling on Horizontal Highly Conductive Microporous Coated Surfaces journal April 2007
The Influence of Surface Roughness on Nucleate Pool Boiling Heat Transfer journal October 2009
Hydrodynamic Prediction of Peak Pool-boiling Heat Fluxes from Finite Bodies journal May 1973
Heater Size and Gravity Based Pool Boiling Regime Map: Transition Criteria Between Buoyancy and Surface Tension Dominated Boiling journal July 2010
Pool Boiling Heat Transfer Characteristics of HFO-1234yf on Plain and Microporous-Enhanced Surfaces journal September 2013
Effects of Pressure and a Microporous Coating on HFC-245fa Pool Boiling Heat Transfer journal July 2014
Hydrodynamic Aspects Of Boiling Heat Transfer (Thesis) report June 1959

Cited By (2)

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
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