Asfa JavedAbdul Aziz BhattiMashood Nasir2012-11-012012-11-012012Paper presented in Symposium on Hydrogen and Fuel Cells SHFC, 9th - 11th July 2012, Islamabad - Pakistanhttps://escholar.umt.edu.pk/handle/123456789/623In this paper electric equivalence model is formulated for the constructional and operational features of a Polymer Electrolyte Membrane Fuel Cell (PEMFC). The proposed model is capable of explaining the behavior of PEMFC in both steady state and transient modes of operation.. For the efficient designing of fuel cell related applications it is highly desirable to model the electrical output of fuel cell in terms of its internal electrochemical dynamics. The proposed model includes the phenomenon like activation polarization, ohmic polarization and mass transport effect. An analogical electrical circuit is formulated by taking these phenomena into considerations. Within acceptable limits, the effects of load variation on output voltage, efficiency and fuel flow demands are also investigated. The static and dynamic characteristics obtained through simulations are compared with the standard available data. Simulation results show that the model can be used in PEM fuel cell distributed generation related control studies.enElectric Equivalent CircuitElectrochemical DynamicsElectrical EngineeringPolymer Electrolyte Membrane Fuel CellOther