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A new configuration of bend tubes for compound optimization of heat and fluid flow

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  • Hajmohammadi, M.R.
  • Eskandari, H.
  • Saffar-Avval, M.
  • Campo, A.

Abstract

Curved pipes constitute essential components in engineering systems such as heat exchangers, and process pipelines. In curved pipes with 180° bends, the excess pressure drop, and the excess entropy generation (through heat and fluid flow) bring forth serious penalties. To overcome these difficulties a new partially curved pipe will be examined in this paper. It consists of three straight pipe segments connected with two 90° bends. The pressure drop and entropy generation are determined numerically for several configurations of ‘partially curved’ pipes when the fluid flow is laminar, viscous and incompressible. It is shown that the new curved pipe is advantageous because the pressure drop and entropy generation are considerably reduced when implementing the optimum layout, compared to the standard case of a fully curved section with 180° bend. As an added value, it is shown that the new optimum partially curved pipes are almost independent of Reynolds and Prandtl numbers.

Suggested Citation

  • Hajmohammadi, M.R. & Eskandari, H. & Saffar-Avval, M. & Campo, A., 2013. "A new configuration of bend tubes for compound optimization of heat and fluid flow," Energy, Elsevier, vol. 62(C), pages 418-424.
    • Handle: RePEc:eee:energy:v:62:y:2013:i:c:p:418-424
    DOI: 10.1016/j.energy.2013.09.046
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    References listed on IDEAS

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    1. Amani, E. & Nobari, M.R.H., 2011. "A numerical investigation of entropy generation in the entrance region of curved pipes at constant wall temperature," Energy, Elsevier, vol. 36(8), pages 4909-4918.
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    Cited by:

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    8. Umberto Lucia, 2014. "The Gouy-Stodola Theorem in Bioenergetic Analysis of Living Systems (Irreversibility in Bioenergetics of Living Systems)," Energies, MDPI, vol. 7(9), pages 1-23, September.
    9. Lucia, Umberto, 2014. "Entropy generation approach to cell systems," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 406(C), pages 1-11.
    10. Hajmohammadi, M.R. & Rahmani, M. & Campo, A. & Joneydi Shariatzadeh, O., 2014. "Optimal design of unequal heat flux elements for optimized heat transfer inside a rectangular duct," Energy, Elsevier, vol. 68(C), pages 609-616.

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