Performance evaluation and parametric optimum design of a syngas molten carbonate fuel cell and gas turbine hybrid system

Abstract

a b s t r a c tA novel model of the molten carbonate fuel cell (MCFC) and gas turbine (GT) hybrid system with direct internal reforming is established, where the fuel cell and the auxiliary burner are taken as the heat reservoirs of the GT. Expressions for the power output and efficiency of the hybrid system are derived by considering various irreversible losses resulting from the overpotentials in the MCFC, the heat leakage in the auxiliary burner, and the finite-rate heat transfer and compression, expansion, and regeneration processes in the GT. The effects of some key parameters including the molar fraction of the oxygen in the oxidant, the utilization factor of the hydrogen in the MCFC on the performance of the hybrid system are revealed. It is found that the efficiency of the hybrid system will be increased by adding the utilization factor of the hydrogen, and the maximum power output of the hybrid system will be achieved when the utilization factor of the hydrogen is equal to 0.78. Moreover, the flowing rates of the syngas and oxidant and the molar fraction of the oxygen in the oxidant are determined under the optimal efficiency or maximum power output of the hybrid system.

Energetic, exergetic and economic (3E) investigation of biomass gasification-based power generation system employing molten carbonate fuel cell (MCFC), indirectly heated air turbine and an organic Rankine cycle

“…Their analyses revealed that the incorporation of the ORC with the MCFC-GT system results in improvement in the system exergetic efficiency by 5%. Zhang et al [3] did investigation on syngas-fuelled system made of MCFC-GT. Their study showed that maximum power out of the system is obtained at fuel utilization factor 0.78.…”

Performance Assessment of Phosphoric Acid Fuel Cell - Thermoelectric Generator Hybrid System With Economic Aspect

“…[11][12][13][14][15] fuel cellheat engine, in refs. [16][17][18][19][20][21][22][23][24][25] fuel cell-Brayton, in refs. [26,27] fuel cell-Braysson hybrid systems were investigated for different conditions and performance criteria.…”

Multi‐objective performance optimization of irreversible molten carbonate fuel cell–Stirling heat engine–reverse osmosis and thermodynamic assessment with ecological objective approach

“…Hybridization of FCs is one of the aforementioned approaches which recovers rejected heat of high temperature to enhance the overall performance. Various arrangements of FC‐heat engines setups are feasible . SOFC and MCFC which operate at high temperatures are more suitable for these purposes.…”

“…Various arrangements of FC-heat engines setups are feasible. [35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51] SOFC and MCFC which operate at high temperatures are more suitable for these purposes. Zhang et al 37 designed a model for a hybrid MCFC-heat engine setup, and evaluated the effective parameters on the system efficiency.…”