Determine the theoretical conversion efficiency for a methane/oxygen fuel cell t

Question

Determine the theoretical conversion efficiency for a methane/oxygen fuel cell that operates at a temperature of 500 K. CH4 + 2O2 rightarrow CO2 + 2H2O Each component gas is considered to be at a pressure of 1 atm. Consider the fuel cell reaction in problem 2. The conversion efficiency of the real fuel cell is 0.60. The cell has an output of 5 kW. The current density is 1000 A/m2. The voltage load is 62% of the reversible voltage. Calculate the fuel consumption rate [kg/hr], and determine the electrode area.

Explanation / Answer

efficiency= output /input given output =5 and efficiency =.6 so input is 5/.6 which is 25/3 kW and now input= voltage*current find out the voltage and now the voltage u got only .62 is used so original voltage would be divide by .62 and get the value of voltage original from the equation u can find out the fuel consuption as the values of pressure and temperature are given and area can be found out from the current density hope its clear

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