Abstract
Abstract Recently, there has been growing interest in fuel cell implementation on aircraft, particularly for Unmanned Aerial Vehicle (UAV) propulsion. The performance of both fuel cell types, cathode air-breathing H2 Proton Exchange Membrane Fuel Cells (PEMFC/H2) and passive Direct Methanol Fuel Cells (DMFCs), is dependent on atmospheric conditions such as pressure, relative humidity and temperature. In this study, models at the single-cell level have been used to simulate the corresponding polarization curves on flight conditions, which constitutes a contribution to the use of fuel cells in UAV. After validating these models, several cases of interest relating to UAV operation have been considered, such as cruise flight at different altitudes and horizontal flight when crossing clouds, to compare the performance of both types of fuel cells. Fuel cell temperature has been controlled to avoid high performance degradation. The results show that the effects of atmospheric flight conditions are more important for PEMFC/H2 than for DMFCs. Low pressure affects PEMFC/H2 performance to a greater extent than DMFC performance. Atmospheric relative humidity affects PEMFC/H2 performance, especially at high cell temperatures, whereas DMFC performance is barely affected. Although performance is lost, it is possible to operate fuel cells in UAV propulsion systems at low-medium altitudes.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.