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Exergy transfer characteristics of forced convective heat transfer through a duct with constant wall temperature

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  • Wu, Shuang-Ying
  • Li, You-Rong
  • Chen, Yan
  • Xiao, Lan

Abstract

The exergy transfer characteristics of fluid flow and heat transfer inside a circular duct under fully developed laminar and turbulent forced convection are presented. Temperature is kept constant at the duct wall. The exergy transfer Nusselt number is put forward and the analytical expressions for exergy transfer Nusselt number are obtained as functions of heat transfer Nusselt number, Reynolds number, Prandtl number, etc. The variations of the local and mean convective exergy transfer coefficient, non-dimensional exergy flux, exergy transfer rate, etc. with operating parameters are presented graphically. By reference to a smooth duct and taking air as working fluid, a numerical analysis of the influence of the Reynolds number and non-dimensional cross-sectional position on exergy transfer characteristics has been conducted. The results show that the process parameters and configuration in the fluid flow and heat transfer inside a duct should be properly selected so that the forced convection process could have the best exergy utilization. In addition, the results corresponding to the exergy transfer and energy transfer are compared.

Suggested Citation

  • Wu, Shuang-Ying & Li, You-Rong & Chen, Yan & Xiao, Lan, 2007. "Exergy transfer characteristics of forced convective heat transfer through a duct with constant wall temperature," Energy, Elsevier, vol. 32(12), pages 2385-2395.
    • Handle: RePEc:eee:energy:v:32:y:2007:i:12:p:2385-2395
    DOI: 10.1016/j.energy.2007.05.014
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    References listed on IDEAS

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    1. Wu, Shuang-Ying & Chen, Yan & Li, You-Rong & Zeng, Dan-Ling, 2007. "Exergy transfer characteristics of forced convective heat transfer through a duct with constant wall heat flux," Energy, Elsevier, vol. 32(5), pages 686-696.
    2. Wang, S.P. & Chen, Q.L. & Yin, Q.H. & Hua, B., 2005. "A phenomenological equation of exergy transfer and its application," Energy, Elsevier, vol. 30(1), pages 85-95.
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    4. Wang, S.P. & Chen, Q.L. & Yin, Q.H. & Hua, B., 2003. "Exergy destruction due to mean flow and fluctuating motion in incompressible turbulent flows through a tube," Energy, Elsevier, vol. 28(8), pages 809-823.
    5. Lior, Noam & Sarmiento-Darkin, Wladimir & Al-Sharqawi, Hassan S., 2006. "The exergy fields in transport processes: Their calculation and use," Energy, Elsevier, vol. 31(5), pages 553-578.
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    Cited by:

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    5. 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.
    6. Feng, Jun-sheng & Dong, Hui & Gao, Jian-ye & Liu, Jing-yu & Liang, Kai, 2016. "Exergy transfer characteristics of gas-solid heat transfer through sinter bed layer in vertical tank," Energy, Elsevier, vol. 111(C), pages 154-164.
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    8. San, J.-Y., 2010. "Second-law performance of heat exchangers for waste heat recovery," Energy, Elsevier, vol. 35(5), pages 1936-1945.

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