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Optimal operating conditions to maximize the net power of polymer electrolyte membrane fuel cells: The stack-system interface of a commercial 18 kW module |
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| Affiliation: | 1. Department of Chemical and Biological Engineering and Clean Energy Research Center, University of British Columbia, 2360 East Mall, Vancouver, BC, V6T 1Z3, Canada;2. Greenlight Innovation, 8339 Eastlake Dr Unit #101, Burnaby, BC, V5A 4W2, Canada;3. Vancouver International CleanTech Research Institute Inc., 4475 Wayburne Dr. Suite 310, Burnaby V5G 4X4, BC, Canada;4. Department of Material Science and Engineering, Southern University of Science and Technology of China (SUSTech), 1088 Xueyuan Ave, Nanshan Qu, Shenzhen Shi, Guangdong Sheng, 518055, China;5. JDV Product Safety Services, Coquitlam, BC, Canada;6. Department of Mechanical and Energy Engineering, Southern University of Science and Technology of China (SUSTech), 1088 Xueyuan Ave, Nanshan Qu, Shenzhen Shi, Guangdong Sheng, 518055, China;7. Shenzhen SouthernTech Fuel Cell Technology, 1088 Xueyuan Ave, Nanshan Qu, Shenzhen Shi, Guangdong Sheng, 518000, China |
| Abstract: | A new, experimental method based on air flow rate rather than current is presented to optimize operating parameters for the stacks and systems of proton exchange membrane fuel cells (PEMFCs) for maximizing their net power. This approach is illustrated for a commercial 18 kW PEMFC module. The impact of contamination pressure drop across the cathode air filter is also investigated on the compressor behavior. It is further shown that a 4V reduction in the compressor voltage reduces its power consumption by 9.1%. Using the 3D graphs of the power-pressure-flow data, it is found that the stack pressure of 180 kPaa is superior to the higher tested pressures as it enhances the net power by 7.0 and 13.7% at different conditions. Application of the present study will lead to the development of PEMFCs with higher power output by optimizing stack pressure, stoichiometry and air flow to properly deliver the system design specifications. |
| Keywords: | Polymer electrolyte membrane fuel cell Stack power density System power Stack-system interface Optimal operating conditions net power output |
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