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Investigating the effect of channel angle of a subsonic MHD (Magneto-Hydro-Dynamic) generator on optimum efficiency of a triple combined cycle

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  • Khalili, Sufia
  • Jafarian Dehkordi, Ali
  • Giahi, Mohammad Hossein

Abstract

In this research, subsonic flow in a MHD (Magneto-Hydro-Dynamic) generator has been simulated and its influence on efficiency and power generation of a triple combined cycle has been investigated. A 2D variable cross-section Faraday channel with segmented electrodes was utilized as a MHD generator model. MHD flow assumed to be ideal with low magnetic Reynolds number. The proposed triple cycle consists of an open MHD channel as a topping cycle, a gas turbine as a middle generator and a steam turbine as a bottoming cycle. A code including the equations, governing the triple cycle behavior, has been developed to analyze the performance of the combined cycle based on MHD generator. The optimum efficiency of 71.32% was attained for the triple cycle that is obviously greater than the efficiency of a combined cycle without MHD generator which was estimated to be 40.89%. Also the maximum net power output of 42.9 MW was obtained by the triple cycle based on a diverging MHD generator with 5.7° diverging angle.

Suggested Citation

  • Khalili, Sufia & Jafarian Dehkordi, Ali & Giahi, Mohammad Hossein, 2015. "Investigating the effect of channel angle of a subsonic MHD (Magneto-Hydro-Dynamic) generator on optimum efficiency of a triple combined cycle," Energy, Elsevier, vol. 85(C), pages 543-555.
    • Handle: RePEc:eee:energy:v:85:y:2015:i:c:p:543-555
    DOI: 10.1016/j.energy.2015.03.064
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    References listed on IDEAS

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    1. Bassily, A.M., 2007. "Modeling, numerical optimization, and irreversibility reduction of a triple-pressure reheat combined cycle," Energy, Elsevier, vol. 32(5), pages 778-794.
    2. Saidi, M.H. & Montazeri, A., 2007. "Second law analysis of a magnetohydrodynamic plasma generator," Energy, Elsevier, vol. 32(9), pages 1603-1616.
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    2. Zhang, Kaiyu & Wang, Yibai & Tang, Haibin & Li, Yong & Wang, Baojun & York, Thomas M. & Yang, Lijun, 2020. "Two-dimensional analytical investigation into energy conversion and efficiency maximization of magnetohydrodynamic swirling flow actuators," Energy, Elsevier, vol. 209(C).

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