4E Analysis of Integrated MHD-Combined Cycle

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

Pages : 219-228

Doi:10.5541/ijot.570540

View : 7 | Download : 5

Publication Date : 2019-11-29

Article Type : Research Paper

Abstract :  In recent years, there have been increasing studies on topping cycles of combined cycle power plants with very high working temperature insert ignore into journalissuearticles values(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