Project 2

The aim of the project is to create a matlab modelfor a fuel cell powered electric vehicle

Matlab Model:

The drive cycle is used as the input for the model the flow rate selector has two input drive cycle and flow rate regulator the ramp & flow rate is the output from the selector The switch provides the output based on the predefined input criteria in the fuel cell stack the motor specification & nominal voltage Operating condition efficiency are provided the boost converter is used to step up the voltage & current voltage sensor are used to measure the values the RLC ckt which is load for the system

Matlab blocks:

Switch

Saturation

Fuel cell stack

Chopper,

Current measurement

DC bus voltage

Series RLC Branch

Results:-

The fuel flow rate keeps on increasing the flow rate varies depends on the drive cycle the max value of the flow rate if 80 The utilizationof the H2 is constant throughout the cycle & air utilization if high during the start of the vehicle the utilization of the O2 and H2 is 60 after sometime the stack consumption of the air & fuel increases during the start of the vehicle the air consumption is arounf 150 lpm & fuel consumption is 50 lpm The stack efficiency decreasing during the start where the fuel consumption is high & the efficiency becomes constant & reaches around 40% during the end of the cycle