Abstract
Due to increasing energy crisis and environmental problems because of air pollution, fuel cell hybrid vehicles are considered as an alternative for internal combustion (IC) vehicles. Proton exchange membrane fuel cells (PEMFC) are the most proper kind of fuel cells for portable usage due to high power density and low performance temperature. In this paper, power train system of a real car, SAMAND SOREN, is modeled and simulated using a dynamic model in MATLAB/SIMULINK software. Five important subsystems in the model are: cathode air supply system, anode fuel supply system, electric motor, battery, and power transmission system. Finally, parameters like power and voltage produced by fuel cell, electric motor torque and vehicle speed are demonstrated as results.
Highlights
Due to increasing energy crisis and environmental problems because of air pollution, fuel cell hybrid vehicles are considered as an alternative for internal combustion (IC) vehicles
Proton exchange membrane fuel cells (PEMFC) is the only fuel cell that is suitable for transportation applications
Disturbance in Fuel Cell (FC) humidity can be induced by different factors which are: accumulated water inside the stack while load increasing, changes in relative and absolute pressure of the reactors inside the membrane, air flow changes and body temperature changes. 20 to 40 percent of power drop is due to lack of proper moisturizing [4]
Summary
This subsystem supplies the air and the hydrogen for the cathode and the anode. the compressed air flow and the electromechanical behavior of the motor are the main parameters in dynamic modeling of the air compressor. This subsystem supplies the air and the hydrogen for the cathode and the anode. The compressed air flow and the electromechanical behavior of the motor are the main parameters in dynamic modeling of the air compressor. When the power demand increases, a lack of air and hydrogen is possible inside the stack. In this condition, to avoid fuel starvation on the anode surface, the amount of the hydrogen and the oxygen is modified with a valve and by making a positive pressure in air flow. Direct coupling of the FC with the compressor is preferred because of high efficiency and the volumetric benefits
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