Effect of the corrugated bipolar plate design on the self‐humidification of a high power density PEMFC stack for UAVs.

Autor: Nefedkin, Sergey I., Klimova, Mariya A., Glasov, Vasiliy S., Pavlov, Vladislav I., Tolmachev, Yuriy V.
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Zdroj: Fuel Cells; Jun2021, Vol. 21 Issue 3, p234-253, 20p
Abstrakt: Open‐cathode PEMFCs for unmanned aerial vehicles operate at a near‐ambient temperature, which requires high super‐stoichiometric air flow rates to remove heat. This, in turn, makes the stack vulnerable to drying out. Using a combination of experimental measurements with a 1.2 kW stack and 3D multiphysics modelling, we show that the design of the corrugated metal bipolar plate with a height above the commonly used 1.05 mm and with cathode cooling channels wider than air‐suppling channels allows for a more efficient heat removal at lower air flow rates, thus assuring a wider range of operating parameters, while maintaining adequate hydration. The self‐humidifying stack attains 1000 W kg−1 power, and the full system with a nominal runtime of 4 h attains specific energy of 700 Wh kg−1. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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