Design and optimization of 500 kW gross power PEMFC system

In order to effectively combat climate change, it is imperative to mitigate greenhouse gas emissions. Among various contributors to emissions, the aviation sector stands out, accounting for approximately 2% of global CO2 emissions and it is expected to increase in the coming years. To address this challenge, two primary strategies can be employed. Firstly, there is a growing interest on transitioning away from carbon-based aviation fuels towards more sustainable alternatives, such as Sustainable Aviation Fuels (SAFs). These SAFs are derived from renewable sources like waste oils or industrial residues, and their production processes have a significantly lower carbon footprint compared to traditional fossil fuels. Secondly, another avenue for reducing emissions involves the electrification of aircraft through the utilization of advanced technologies like batteries or fuel cells. Proton Exchange Membrane Fuel Cells (PEMFCs) are a promising example of such technology, capable of converting the chemical energy of hydrogen into electrical energy while producing only water as a waste product. However, the wide adoption of PEMFCs faces obstacles, including the considerable weight and volume of the system. In light of these challenges, the primary objective of this thesis is the design and optimization of a typical PEMFC system. Specifically, the aim is to develop a system capable of generating 500 kilowatts of electrical power for a duration of 2 hours, with hydrogen stored at a pressure of 700 bar and 15 °C. The optimization process will focus on reducing the weight and volume of system components, while simultaneously enhancing available power output. By achieving these objectives, it is hoped that this research will contribute towards the advancement of sustainable aviation technologies and the overall reduction of greenhouse gas emissions within the aviation sector.