The thesis analyzes the influence of relative humidity at various carbon monoxide concentrations in reformate gas on the performance of a high temperature proton exchange membrane fuel cell. The experimental work was conducted at the Faculty of mechanical engineering in Ljubljana, in the Laboratory for thermal energy, using a Greenlight test station, where operating parameters were accurately controlled and recorded. The measurements were divided into three sets based on carbon monoxide concentration, along with four reference measurements, all presented in the form of polarization curves. The analysis showed that the performance of the fuel cell increases linearly with higher relative humidity of the fuel. Additionally, it was found that the cell maintained its original performance despite the presence of carbon monoxide, confirming its resilience and suitability for use with reformate gases.
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