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2003 Course Fuel Cell Technology (Elective II)

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Total No. of Questions :12] P1120 [Total No. of Pages : 3 [3864] - 340 B.E.(Chemical) FUEL CELL TECHNOLOGY (2003 Course) (409348) (Elective - II) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Use two separate answer sheets for writing the answers to the two sections. 2) Draw schematics wherever necessary. 3) Assume suitable data,wherever necessary. 4) Write the chemical reactions wherever necessary. 5) All questions are compulsory. SECTION - I Q1) Differentiate among PEM, phosphoric acid, molten carbonate and solid oxide fuel cells, based on their operating conditions and materials of construction of different components. [16] OR Q2) a) Delineate the salient features of hydrogen storage for fuel cell. [8] b) Explain schematically the working principle of Molten Carbonate Fuel Cell (MCFC). [8] Q3) a) In a typical SOFC, current density of 10A/m2 is obtained when pure hydrogen is fed at the pressure of 2 atm. Inside the fuel cell, total pressure of gases on anodic side is observed to be 2.5 atm. The air is supplied at 1.5 atm. The cell is operated at 900oC. The diffusivities of hydrogen, oxygen and water vapor are 95, 70 and 55 C/s.m2.atm. Calculate concentration overpotentials across anode and cathode. [9] b) Calculate fuel utilization factor, air ratio, power output and fuel efficiency of SOFC using the given data. [9] Average current density = 10 A/m2 P.T.O.

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