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Heat-exchanger performance: Effect of orientation

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  • Leung, C.W.
  • Probert, S.D.

Abstract

For an extended-surface natural-convective type heat-exchanger in air, with its base at up to 40°C above the temperature of the ambient environment, the steady-state heat-transfer performances of the three most commonly employed orientations of the rectangular fins and base (namely vertical fins perpendicular to a vertical base, or protruding vertically upwards from a horizontal base, or horizontal fins attached to a vertical base) have been considered. The latter configuration is of no practical interest for the intended purpose because of its relatively inferior heat-transfer capabilities. If an optimal inter-fin separation of approximately 10 mm is adopted, all other conditions remaining invariant, a higher heat-transfer rate per unit base area is usually achieved from the array of fins when they are attached orthogonally to the vertical, rather than the horizontal, base; but this is not unequivocally so! More than 300 sets of experimental data, obtained from several different arrays of vertical rectangular highly polished duralumin fins protruding orthogonally either from a vertical, or upwards from a horizontal, rectangular highly polished duralumin base were assessed. The non-dimensional data correlations that emerged enable the average coefficient for heat-transfer from a finned surface to the ambient environment, for all the finned surfaces in these two types of configuration, to be easily predicted.

Suggested Citation

  • Leung, C.W. & Probert, S.D., 1989. "Heat-exchanger performance: Effect of orientation," Applied Energy, Elsevier, vol. 33(4), pages 235-252.
  • Handle: RePEc:eee:appene:v:33:y:1989:i:4:p:235-252
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    Cited by:

    1. Wang, Zhe & Li, Yanzhong, 2016. "A combined method for surface selection and layer pattern optimization of a multistream plate-fin heat exchanger," Applied Energy, Elsevier, vol. 165(C), pages 815-827.
    2. Shaeri, M.R. & Yaghoubi, M. & Jafarpur, K., 2009. "Heat transfer analysis of lateral perforated fin heat sinks," Applied Energy, Elsevier, vol. 86(10), pages 2019-2029, October.
    3. Jang, Daeseok & Yook, Se-Jin & Lee, Kwan-Soo, 2014. "Optimum design of a radial heat sink with a fin-height profile for high-power LED lighting applications," Applied Energy, Elsevier, vol. 116(C), pages 260-268.
    4. Leung, C. W. & Probert, S. D., 1997. "Heat-exchanger performance: Influence of gap width between consecutive vertical rectangular fin-arrays," Applied Energy, Elsevier, vol. 56(1), pages 1-8, January.
    5. Ghosh, Aritra & Norton, Brian & Duffy, Aidan, 2016. "Behaviour of a SPD switchable glazing in an outdoor test cell with heat removal under varying weather conditions," Applied Energy, Elsevier, vol. 180(C), pages 695-706.
    6. Harahap, Filino & Setio, Daru, 2001. "Correlations for heat dissipation and natural convection heat-transfer from horizontally-based, vertically-finned arrays," Applied Energy, Elsevier, vol. 69(1), pages 29-38, May.
    7. Grzegorz Czerwiński & Jerzy Wołoszyn, 2021. "Optimization of Air Cooling System Using Adjoint Solver Technique," Energies, MDPI, vol. 14(13), pages 1-24, June.

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