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Fuel Cell Fundamentals Solutions

Timothy P. Holme Ryan O¡¯Hayre Suk Won Cha Whitney Colella Fritz B. Prinz

Solution companion to Fuel Cell Fundamentals. Suggested grading schemes are given after the problem numbers.

1

Chapter 1 solutions

Problem 1.1 (10 points) Possible answers include: FC advantages over other power conversion devices: 1. Potentially higher e?ciency. 2. Solid state components have no moving parts, giving higher reliability and lower maintenance costs 3. silent operation 4. low emissions 5. fuel cells refuel rather than rech-arge, which could be faster. Disadvantages: 1. cost 2. low power density 3. problems of hydrogen storage, production, transport, lower energy density 4. temperature problems: PEMs can¡¯t start in the cold, high temperatures of SOFCs create materials, thermal cycling, and sealing problems 5. water management issues in PEMs. Applications: 1. portable applications (such as laptops, cellphones, etc.) where their fast refueling, silent op¡¦(»ý·«)