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Second-law optimization of regenerative heat exchangers, including the effect of matrix heat conduction

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  • Shen, C.M.
  • Worek, W.M.

Abstract

The effects of heat conduction in a regenerator matrix and unbalanced heat-capacity rates on the second-law efficiency of rotary regenerators are documented. The results show that the maximum second-law efficiency increases as the ratio of the heat-capacity rate increases. The overall number of transfer units NTUo corresponding to this optimum also increases with heat capacity rate C∗. Including the effect of heat conduction in the regenerator matrix lowers the second-law efficiency and increases the NTUo required to obtain the maximum second-law efficiency. These results can be used to design and optimize the performance of a regenerator considering both heat transfer and pressure drop effects.

Suggested Citation

  • Shen, C.M. & Worek, W.M., 1993. "Second-law optimization of regenerative heat exchangers, including the effect of matrix heat conduction," Energy, Elsevier, vol. 18(4), pages 355-363.
    • Handle: RePEc:eee:energy:v:18:y:1993:i:4:p:355-363
    DOI: 10.1016/0360-5442(93)90070-T
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    Cited by:

    1. San, J.-Y., 2010. "Second-law performance of heat exchangers for waste heat recovery," Energy, Elsevier, vol. 35(5), pages 1936-1945.
    2. Azad, Abazar Vahdat & Amidpour, Majid, 2011. "Economic optimization of shell and tube heat exchanger based on constructal theory," Energy, Elsevier, vol. 36(2), pages 1087-1096.

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