The air-side thermal-hydraulic performance of flat-tube aluminum heat exchangers is studied experimentally for conditions typical to air-conditioning applications, for heat exchangers constructed with serpentine louvered, wavy, and plain fins. Using a closed-loop calorimetric wind tunnel, heat transfer and pressure drop are measured at air face velocities from 0.5 m/s to 2.8 m/s for dry- and wet-surface conditions. Parametric effects related to geometry and operating conditions on heat transfer and friction performance of the heat exchangers are explored. Significant differences in the effect of geometrical parameters are found for dry and wet conditions. For the louver-fin geometry, using a combined database from the present and the previous studies, empirical curve-fits for the Colburn - and -factors are developed in terms of a wet-surface multiplier. The wet-surface multiplier correlations fit the present database with rms relative residuals of 21.1% and 24.4% for and multipliers, respectively. Alternatively, stand-alone Colburn and correlations give rms relative residuals of 22.7% and 29.1%, respectively.
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The Air-Side Thermal-Hydraulic Performance of Flat-Tube Heat Exchangers With Louvered, Wavy, and Plain Fins Under Dry and Wet Conditions
Young-Gil Park,
Young-Gil Park
Department of Mechanical Science and Engineering,
e-mail: ypark5@uiuc.edu
University of Illinois
, 1206 West Green Street, Urbana, IL 61801
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Anthony M. Jacobi
Anthony M. Jacobi
Department of Mechanical Science and Engineering,
e-mail: a-jacobi@uiuc.edu
University of Illinois
, 1206 West Green Street, Urbana, IL 61801
Search for other works by this author on:
Young-Gil Park
Department of Mechanical Science and Engineering,
University of Illinois
, 1206 West Green Street, Urbana, IL 61801e-mail: ypark5@uiuc.edu
Anthony M. Jacobi
Department of Mechanical Science and Engineering,
University of Illinois
, 1206 West Green Street, Urbana, IL 61801e-mail: a-jacobi@uiuc.edu
J. Heat Transfer. Jun 2009, 131(6): 061801 (13 pages)
Published Online: March 30, 2009
Article history
Received:
March 20, 2008
Revised:
December 1, 2008
Published:
March 30, 2009
Citation
Park, Y., and Jacobi, A. M. (March 30, 2009). "The Air-Side Thermal-Hydraulic Performance of Flat-Tube Heat Exchangers With Louvered, Wavy, and Plain Fins Under Dry and Wet Conditions." ASME. J. Heat Transfer. June 2009; 131(6): 061801. https://doi.org/10.1115/1.3089548
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