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Exergoeconomic assessment and parametric study of a Gas Turbine-Modular Helium Reactor combined with two Organic Rankine Cycles

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  • Mohammadkhani, F.
  • Shokati, N.
  • Mahmoudi, S.M.S.
  • Yari, M.
  • Rosen, M.A.

Abstract

An exergoeconomic analysis is reported for a combined system with a net electrical output of 299 MW in which waste heat from a Gas Turbine-Modular Helium Reactor (GT-MHR) is utilized by two Organic Rankine Cycles (ORCs). A parametric study is also done to reveal the effects on the exergoeconomic performance of the combined system of such significant parameters as compressor pressure ratio, turbine inlet temperature, temperatures of evaporators, pinch point temperature difference in the evaporators and degree of superheat at the ORC (Organic Rankine Cycle) turbines inlet. Finally the combined cycle performance is optimized from the viewpoint of exergoeconomics. The results show that the precooler, the intercooler and the ORC condensers exhibit the worst exergoeconomic performance. For the overall system, the exergoeconomic factor, the capital cost rate and the exergy destruction cost rate are determined to be 37.95%, 6876 $/h and 11,242 $/h, respectively. Also, it is observed that the unit cost of electricity produced by the GT-MHR turbine increases with increasing GT-MHR turbine inlet temperature but decreases as the other above mentioned parameters increase.

Suggested Citation

  • Mohammadkhani, F. & Shokati, N. & Mahmoudi, S.M.S. & Yari, M. & Rosen, M.A., 2014. "Exergoeconomic assessment and parametric study of a Gas Turbine-Modular Helium Reactor combined with two Organic Rankine Cycles," Energy, Elsevier, vol. 65(C), pages 533-543.
    • Handle: RePEc:eee:energy:v:65:y:2014:i:c:p:533-543
    DOI: 10.1016/j.energy.2013.11.002
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    References listed on IDEAS

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