(Barbir Chp6 Problem 4) A fuel cell has 100 cm? active area. Air at the inlet is fully saturated at 60°C. Pressure at the inlet is 200 kPa, and there is a 15 kPa pressure drop through the flow field. Oxygen stoichiometric ratio is 2.5. Calculate the heat generated at 0.65V and 1 A/cm? by (i) assuming energy of fuel (higher heating value) is converted into electricity and heat and (ii) by doing a detailed mass and heat balance analysis (assume hydrogen is supplied in dead-end mode saturated at 60°C and that net water transport through the membrane is such that there is no water accumulation on the anode side). (Answer: 83.2 W. 85.13 W)
(Barbir Chp6 Problem 4) A fuel cell has 100 cm? active area. Air at the inlet is fully saturated at 60°C. Pressure at the inlet is 200 kPa, and there is a 15 kPa pressure drop through the flow field. Oxygen stoichiometric ratio is 2.5. Calculate the heat generated at 0.65V and 1 A/cm? by (i) assuming energy of fuel (higher heating value) is converted into electricity and heat and (ii) by doing a detailed mass and heat balance analysis (assume hydrogen is supplied in dead-end mode saturated at 60°C and that net water transport through the membrane is such that there is no water accumulation on the anode side). (Answer: 83.2 W. 85.13 W)
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Author:Robert L. Boylestad
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Transcribed Image Text:(Barbir Chp6 Problem 4) A fuel cell has 100 cm active area. Air at the inlet is fully saturated at 60°C.
Pressure at the inlet is 200 kPa, and there is a 15 kPa pressure drop through the flow field. Oxygen
stoichiometric ratio is 2.5. Calculate the heat generated at 0.65V and 1 A/cm? by (i) assuming energy of
fuel (higher heating value) is converted into electricity and heat and (ii) by doing a detailed mass and heat
balance analysis (assume hydrogen is supplied in dead-end mode saturated at 60°C and that net water
transport through the membrane is such that there is no water accumulation on the anode side). (Answer:
83.2 W, 85.13 W)
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