Proposing New Algorithm for Modeling of Regenerative Fuel Cell (RFC) System

Regenerative Fuel Cell (RFC) systems are used for the enhancement of sustainable energy aspect in conventional fuel cells. In this study, a photovoltaic-electrolyzer-fuel cell integrated cycle has been presented. The proposed system has been designed as a novel approach for alleviating the restrictions on energy streams in the RFC systems. Modeling of the system has been performed from the mass and energy point of view, based on both theoretical and practical procedures. To generate electricity from hydrogen, a proton exchange membrane fuel cell, integrated with an electrolyzer system which it works by solar energy, has been used. Optimized results of required photovoltaic area have been shown significant differences between theoretical and practical approaches. Moreover, all efficiencies of two scenarios including total efficiency have been indicated and analyzed. The main advantage of this system in compare with single solar systems is generating internal energy about 2.3 kW for producing 1 kW electricity by fuel cell.