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Fuel cell stack operation

• Thermal management [1,2]
• Fluid flow distribution in stacks [3]

An efficient long term operation of fuel cell stacks requires an optimized operation strategy. This includes all operational parameters and life cycles of components. Special attention needs to be paid to start-up, shut-down, operation at constant load, rapid load changes and operation at maximum stack power. The thermal management of HT-PEFC is one key element for these processes. During the start-up phase the stack needs to heat up fast to the operation temperature. During normal operation the stack temperature needs to be kept within a narrow range. Otherwise, severe losses in stack power or lifetime can occur.
The distribution of fluid flow inside the stack is another key element for performance and lifetime. Therefore, stack and cell manifolds are designed with the aid of suitable experiments and modelling approaches.

[1] J. Supra, H. Janßen , W. Lehnert, D. Stolten
Temperature distribution in a liquid-cooled HT-PEFC stack
J. Hydrogen Energy 38 ( 2013 ) 1943 - 1951

[2] J. Supra, H. Janßen, W. Lehnert, D. Stolten
Design and experimental investigation of a heat pipe supported external cooling system for HT-PEFC fuel cell stacks
Journal of Fuel Cell Science and Technology 10 (2013) 051002-1 - 051002-7

[3] L. Lüke, H. Janßen, M. Kvesić, W. Lehnert, D. Stolten
Performance Analysis of HT-PEFC Stacks
Int. J. Hydrogen Energy 37 (2012) 9171-9181


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