Condensation film coefficients for mixtures of isobutane and isopentane
Presented herein are data on heat-transfer film coefficients for the condensation of 90/10, 80/20, 70/30, 60/40, and 50/50 mole-% isobutane/isopentane. For comparison, data on condensation of instrument-grade and commercial-grade isobutane are also presented. The vapor was condensed on the outside of a horizontal instrumented tube with cooling water flowing inside the tube. The tube was fitted with thermocouples imbedded inside the wall of the tube to measure tube wall temperature at five equidistant stations along the length of the tube. The vapor temperature in the shell was measured using 17 thermocouples located at 150 mm intervals and spanning the five stations. Results for the data taken, based on the difference between vapor temperature and wall temperature, indicate lower condensation film coefficient when the mole fraction of isopentane is increased in the mixture. Mole-percent values of isopentane <50% would be expected to reverse this trend.
- Research Organization:
- Water Thermal and Chemical Technology Center, University of California, Berkeley
- OSTI ID:
- 6696876
- Journal Information:
- J. Energy; (United States), Journal Name: J. Energy; (United States) Vol. 7:6; ISSN JENED
- Publisher:
- r
- Country of Publication:
- United States
- Language:
- English
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Condensation film coefficients for mixtures of isobutane and isopentane
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Related Subjects
2-METHYLPROPANE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKANES
CHEMICAL REACTION KINETICS
COEFFICIENT OF PERFORMANCE
DISPERSIONS
ENERGY TRANSFER
FILM CONDENSATION
FLUID MECHANICS
HEAT TRANSFER
HYDROCARBONS
KINETICS
MEASURING INSTRUMENTS
MECHANICS
MIXTURES
ORGANIC COMPOUNDS
REACTION KINETICS
TEMPERATURE MEASUREMENT
VAPOR CONDENSATION