Iranian Journal of Mechanical Engineering Transactions of ISME

Iranian Journal of Mechanical Engineering Transactions of ISME

Investigation of thermal characteristics effects on exergoeconomic performance of the combined cycle of gas turbine modular Helium reactor with organic Rankine cycle

Authors
Abstract
In the present work, the Gas Turbine Modular Helium Reactor (GT/MHR) combined with Organic Rankine Cycle (ORC) is simulated from the viewpoints of first and second laws of thermodynamics as well as the exergoeconomics. Temperature, pressure and exergetic cost of all streams are calculated and exergoeconomic performance of combined cycle is investigated. Attention is paid to the effects of the evaporator temperature, the pinch point temperature difference in the evaporator and the superheat degree of the organic fluid on the exergoeconomic performance of the combined cycle. The results of parametric study showed that as the evaporator temperature, Te, and pinch point temperature difference in the evaporator, ∆TE, increase, the unit cost of electricity produced by gas turbine is decreased. Furthermore, the exergy destruction cost rate is minimized at Tev=109 0C while the exergoeconomic factor is maximized at Tev=102 0C.
Keywords

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Volume 16, Issue 4 - Serial Number 37
Fluid Mechanics and Heat Transfer
Winter 2015
Pages 6-24

  • Receive Date 20 February 2015