4E Analysis of Integrated MHD-Combined Cycle

Year 2019, Volume: 22 Issue: 4, 219 - 228, 29.11.2019

M.A. Esmaeilzadehazimi , Mohammad Hasan Khoshgoftar Manesh , B. Bakhtiari Heleyleh H Vaznini Modabbaer

https://doi.org/10.5541/ijot.570540

Cited By: 4

Abstract

 In recent years, there have been increasing studies on topping cycles
of combined cycle power plants with very high working temperature (about 3000
K). One of the thermal cycles, which have the ability to work in this
temperature range, is MHD –Magneto hydrodynamic- cycle. MHD cycle can operate
in two states. One state is the open cycle, and the other one is the close
cycle. In both mentioned states there is a large amount of waste heat that can
be recovered. It seems that the use of recovered heat from MHD cycles as the
heat source for a gas turbine cycle namely Brayton according to their working
temperature is very suitable.

In this research, integration of combined cycle with MHD generator
as the topping cycle has been investigated as a proposed cycle. In this regard,
the thermodynamic simulation of the plant has been performed. To verification
of the thermodynamic simulation, the results have been compared with Thermolfex
software and the data in the literature. In addition, exergetic,
exergoeconomic, and environmental modeling and evaluation have been performed through
computer code. The results show the good accuracy of the thermodynamic
simulation for the integrated system. Also, the proposed cycle has a higher
efficiency with the lower cost of exergy destruction and lower emission
pollution.

Keywords

MHD generator, Brayton Cycle, Rankine cycle, Combined cycle

Supporting Institution

University of Qom

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