Machines, Volume 9, Issue 12
2021 December - 74 articles
Cover Story: Fuel cells are a key technology for low-emission mobility in the future. An electric air compressor—one of the most important system components and the highest parasitic power consumer —is necessary to supply the fuel cell with the required air mass flow at the fuel cell’s operating pressure. Fuel cell air supply systems often combine a compressor with a downstream turbine to recover energy from the fuel cell exhaust gas and thus improve system efficiency. The objectives of current research and this article are to improve the efficiency and extend the operating range of air supply units. For this purpose, an experimentally validated CFD study was performed on an existing air supply system. The features investigated for the compressor diffuser and turbine nozzles significantly improved the performance. View this paper.
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Machines - ISSN 2075-1702