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Conservation of available work (exergy) by using promoters of swirl flow in forced convection heat transfer

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  • Oullette, William R.
  • Bejan, Adrian

Abstract

We examine the potential of heat-transfer augmentation techniques to reduce irreversibility (entropy generation, destruction of available work) in equipment for heat exchange. A number of popular swirl flow-promoting techniques is investigated in detail. It is shown that the irreversibility reduction induced by each technique depends strongly on the operating parameters of the apparatus in which heat transfer is to be augmented. An important operating parameter is the ratio of fluid-friction irreversibility divided by heat-transfer irreversibility, φ0. It is shown that φ0 must lie below a critical value in order for a proposed augmentation technique to yield savings in available work. The paper illustrates the use of entropy generation in assessing the relative merit of competing heat-transfer augmentation techniques. The geometric features of a proposed augmentation technique can be optimally selected in order to yield the maximum reduction in heat exchanger duct irreversibility.

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  • Oullette, William R. & Bejan, Adrian, 1980. "Conservation of available work (exergy) by using promoters of swirl flow in forced convection heat transfer," Energy, Elsevier, vol. 5(7), pages 587-596.
    • Handle: RePEc:eee:energy:v:5:y:1980:i:7:p:587-596
    DOI: 10.1016/0360-5442(80)90039-0
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    Cited by:

    1. Manjunath, K. & Kaushik, S.C., 2014. "Second law thermodynamic study of heat exchangers: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 40(C), pages 348-374.
    2. Satapathy, Ashok K., 2009. "Thermodynamic optimization of a coiled tube heat exchanger under constant wall heat flux condition," Energy, Elsevier, vol. 34(9), pages 1122-1126.
    3. Khaliq, Abdul, 2004. "Thermodynamic optimization of laminar viscous flow under convective heat-transfer through an isothermal walled duct," Applied Energy, Elsevier, vol. 78(3), pages 289-304, July.

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