TY - THES A1 - Izzuddin, Kamal T1 - Experimental and Simulative Study on the Performance of PEM Fuel Cell under Different Operating Conditions N2 - The aim of the thesis is to study the influence of operating conditions on the performance of the proton exchange membrane fuel cell (PEMFC) such as temperature, cathode stoichiometry and cathode relative humidity. The experiment is conducted at temperature points of 60°C, 70°C and 80°C, where at each temperature point cathode stoichiometry of 2 and 5 are set. Within each stoichiometry, the cell is operated at cathode relative humidity of 50%, 75% and 100%. The fuel cell performance is analyzed using two methods, current-voltage measurement, and the electrochemical impedance spectroscopy, where the polarization curves, power output density and high-frequency resistance (HFR) are recorded. A numerical analysis is then conducted on a 3-dimensional straight single channel fuel cell and is fitted with the data measured experimentally. Increasing the temperature has a different degree of improvement on the fuel cell’s performance based on its cathode stoichiometry and relative humidity settings. The HFR measurements provide an insight into the voltage loss that is exerted by the fuel cell on each test condition. The numerical analysis shows that the impact of operating conditions does not exhibit any significant differences on the fuel cell model. KW - Proton exchange membrane fuel cell KW - Current and voltage measurement KW - Electrochemical impedance spectroscopy KW - High-frequency resistance KW - CFD KW - Numerical analysis Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:1383-opus4-15909 ER -