Conjugate heat transfer of a finned oval tube. Part B: Heat transfer behaviors

Journal Article · Sun Mar 01 04:00:00 EST 1998 · Numerical Heat Transfer. Part A, Applications

DOI:https://doi.org/10.1080/10407789808913945· OSTI ID:624107

Chen, Y; Fiebig, M; Mitra, N K ^[1]

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1. Ruhr-Universitaet Bochum (Germany). Institut fuer Thermo- und Fluiddynamik

Conjugate heat transfer in a high-performance finned oval tube heat exchanger element has been calculated for a thermally and hydrodynamically developing three-dimensional laminar flow. The influence of Reynolds number in the range 100--500 and of a fin parameter Fi, the product of the dimensionless fin thickness and its thermal conductivity, on the heat transfer behavior have been studied. In part 1, the computed velocity field was presented. Here the authors present the heat transfer behavior, including heat flux on the tube, fin temperatures, fin Nusselt numbers and heat flux distributions, fin efficiencies, Colburn j factor, and apparent friction factor f{sup app}. For the investigated configuration, the ratio of heat transfer on the tube to that on the fin remains under 10%. The fin temperature and fin efficiency depend weakly on Fi. Finned tube heat exchangers are used in air conditioners and the chemical industry.

• Sponsoring Organization: USDOE
• OSTI ID: 624107
• Journal Information: Numerical Heat Transfer. Part A, Applications, Journal Name: Numerical Heat Transfer. Part A, Applications Journal Issue: 4 Vol. 33; ISSN 1040-7782; ISSN NHAAES
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
42 ENGINEERING
AIR CONDITIONERS
CHEMICAL INDUSTRY
HEAT EXCHANGERS
HEAT TRANSFER
THREE-DIMENSIONAL CALCULATIONS