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Portable Proton Exchange Membrane Fuel-cell Systems for Outdoor Applications by M. Oszcipok; M. Zedda; J. Hesselmann; M. Huppmann; M. Wodrich; M. Junghardt; C. Hebling is a Engineering article available to read on EtoBox.

What is Portable Proton Exchange Membrane Fuel-cell Systems for Outdoor Applications about?

A hydrogen fuelled, 30 W proton exchange membrane fuel-cell (PEMFC) system is presented that is able to operate at an ambient temperature between -20 and 40 • C. The system, which comprises the fuel-cell stack, pumps, humidifier, valves and blowers is fully characterized in a climatic chamber under various ambient temperatures. Successful cold start-up and stable operation at -20 • C are reported as well as the system behaviour during long-term at 40 • C. A simple thermal model of the stack is developed and validated, and accounts for heat losses by radiation and convection. Condensation of steam is addressed as well as reaction gas depletion. The stack is regarded as a uniform heat source. The electrochemical reaction is not resolved. General design rules for the cold start-up of a portable fuel-cell stack are deduced by the thermal model and are taken into consideration for the design. The model is used for a comparison between active-assisted cold start-up procedures with a passive cold start-up from temperatures below 0 • C. It is found that a passive cold start-up may not be the most efficient strategy. Additionally, the influence of different stack concepts on the start-up be

Who reads Portable Proton Exchange Membrane Fuel-cell Systems for Outdoor Applications?

Author

M. Oszcipok; M. Zedda; J. Hesselmann; M. Huppmann; M. Wodrich; M. Junghardt; C. Hebling

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0378-7753)

Published

2006

Language

EN

Field

Engineering (Physical Sciences)