Abstract
This paper presents a study of the fuel cell system performance operating at different pressure and temperature levels. A polymer electrolyte fuel cell (PEFC) is analyzed according with the possibility of using in transport applications. Therefore, it begin with the description of a parametric model of the fuel cell which has been developed using a combination between empirical and mathematics modeling techniques. This model enables to simulate fuel cells V-J curves in dependences with the stack temperature and the oxygen partial pressure. In addition, it can be used to study the influence of the gases management (pressure) on the fuel cell stack performances