A proposed electric vehicle using proton exchange membrane (PEM) as clean energy have been attracting due to their high efficiency, high energy density and zero emissions. Standard exergy analysis of a mini urban vehicle powered by a 1 kW Proton Exchange Membrane (PEM) fuel cell engine system has been presented in this manuscript. A sensitivity analysis has been studied in order to evaluate the effect of variable operating temperatures and pressures on the physical exergy and efficiency of a 1 kW PEM fuel cell engine. The calculation of the physical and chemical exergies, mass flow rate and exergy efficiency are performed at temperature ratio (T/T0) and pressure ratio (P/P0) ranging from 1 to 1.15 and 1 to 4, respectively. The findings of the exergy analysis reveal that the overall efficiency of the fuel cell system was observed to be 61.3%. The result of the parametric study show that an increase in operating temperature and pressure results in an increase in exergy efficiency of the system.
Hanapi, S., Tijani, A. S., Rahim, A. H. A., & Mohamed, W. A. N. W. (2015). Exergy Efficiency Profile of A 1kW Open Cathode Fuel Cell with Pressure and Temperature Variations. In Energy Procedia (Vol. 79, pp. 82–89). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2015.11.481