Effect of recycling solid oxide fuel cell products on the performance of a SOFC-Gas turbine hybrid system

Document Type : Research Paper


1 Institute of Energy, Graduate University of Advanced Technology, Kerman, Iran

2 Department of Mechanical Engineering, Shahid Bahonar University, Kerman, Iran

3 Department of Mechanical Engineering, Graduate University of Advanced Technology, Kerman, Iran


In this study, the effect of recycling fuel cell products on the performance of a solid oxide fuel cell and gas turbine (SOFC-GT) hybrid system was investigated. Three types of products recycling are considered: cathode products recycling (CPR), anode products recycling (APR), and both cathode and anode products recycling (BACPR). In the present work,   operating temperature and  limiting current density was calculated from   governing equations by the trial and error method. Furthermore, the effect of pressure ratio and air utilization factor on the performance of the SOFC-GT hybrid system is considered. Results show that   CPR has more effect on the performance of hybrid systems than   APR. The total electrical efficiency of the hybrid system increases as the cathode recycle ratio (CRR) increases and decreases as the anode recycle ratio (ARR) decreases. In addition, results show that the hybrid system with BACPR can achieve a higher overall electrical efficiency of approximately 75%.


Main Subjects

[1] Reijalt M. Hydrogen and fuel cell education in Europe: from when? And where? To here! And now!.Journal of Cleaner Production,18, pp.112-117, 2010.
[2] Williams MC. Fuel cell handbook.EG&G Technical Services, Inc, West Virginia, 2004.
[3] Singhal SC. Advances in Solid Oxide Fuel Cells.Journal of Solid State Ionic, 135, pp.305-313, 2000.
[4] Chan SH, Khor KA, Xia ZT.A complete polarization model of a solid oxide fuel cell and its sensitivity to the change of cell component thickness.Journal of Power Sources,93, pp.130-140, 2001.
[5] Chan SH, Ho HK, TianY.Modeling of simple hybrid solid oxide fuel cell and gas turbine power plant.Journal of Power Sources ,109,pp. 111-120, 2002.
[6] Volkan Akkaya A. Electrochemical Model for Performance Analysis of a Tubular SOFC.International Journal ofEnergy Research, 31, pp.79-98, 2007.
[7] GhanbariBavarsad P. Energy and exergy analysis of internal reforming solid oxide fuelcellegas turbine hybrid system. International Journal of Hydrogen Energy 32,pp. 4591-4599, 2007.
[8] Pirkandi J, Ghassemi M, Hamedi MH, Mohammadi R. Electrochemical and thermodynamic modeling of a CHP system using tubular solid oxide fuel cell (SOFC-CHP). Journal of Cleaner Production, 29,30,pp. 151-162, 2012.
[9] Aloui T, Halouani K. Analytical modeling of polarizations in a solid oxide fuel cell using biomass syngas product as fuel.Applied Thermal Engineering, 27 ,pp. 731–737, 2007.
[10] Haseli Y, Dincer I, Naterer GF. Thermodynamic Modeling of a Gas Turbine Cycle Combined with a Solid Oxide Fuel Cell.InternationalJournal of Hydrogen energy, 33, pp. 5811-5822, 2008.
[11] Motahar S,Alamrajabi AA,  Exergy Based Performance Analysis of a Solid Oxide Fuel Cell and Steam Injected Gas Turbine Hybrid Power System.International journal of hydrogen energy, 34, pp. 2396-2407, 2009.
[12] Calise F, Palombo A, VanoliL. Design and partial load exergy analysis of hybrid SOFC–GT power plant. Journal of Power Sources, 158,pp. 225–244, 2006.