An experimental investigation of the individual boiling and condensing heat-transfer coefficients for hydrogen

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Advances in Cryogenic Eng.

DOI:https://doi.org/10.1007/978-1-4757-0531-7_49· OSTI ID:4784983

Drayer, D E; Timmerhaus, K D

The relationship between the individual film heat-transfer coefficients and the variables of temperature difference and heat flux for boiling and condensing hydrogen films on a smooth vertical tube surface was studied experimentally. The boiling occurred on the outside surface while the condensing took place on the inside surface. Boiling heat-transfer coefficients determined over a temperature difference range of 0.06 deg to 1.17 deg for a heat flux spread of 23 to 978 Btu/hr-ft²varied from 360 to 800 Btu/hr-ft^2- deg F. Condensing heat-transfer coefficients determined for a 4.44-in.-long tube over a temperature difference range of 0.31 deg to 4.89 deg F and a heat flux spread of 31 to 1310 Btu/hr-ft² varied from 90 to 300 Btu/hr-ft^2- deg F. Overall heat-transfer coefficients determined over a temperature difference range of 0.38 deg to 6.06 deg F and a heat flux spread of 23 to 978 mental results are compared with theoretical and empirical correlations for predicting boiling and condensing heat-transfer coefficients for normal fluids.

• Research Organization: CEL National Bureau of Standards, Boulder, Colo.
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-000023
• OSTI ID: 4784983
• Journal Information: Advances in Cryogenic Eng., Journal Name: Advances in Cryogenic Eng. Vol. Vol: 7
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOILING
FILMS
FLUIDS
HEAT TRANSFER
HYDROGEN
LIQUEFYING
LOW TEMPERATURE
MEASURED VALUES
SURFACES
TEMPERATURE
TUBES