산소극 반응가스 흐름방향, 상대습도, 기공률 변화에 따른 고분자전해질연료전지 성능분석
Performance Analysis of Polymer Electrolyte Membrane Fuel Cell Depending on the Flow Direction of Cathode Reactant Gas, Relative Humidity, and Porosity
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초록
A numerical analysis was performed to study PEMFC performance characteristics depending on the flowdirection of cathode reactant gas, cathode relative humidity, and porosity of gas diffusion layer. As cathoderelative humidity decreases and porosity increases, current density increases due to better diffusion of reactantgas to cathode surface. As current density increases, power density increases initially and then decreases withits maximum located around current density value of 2.2 Amperes per square centimeter. From the analysis ofcurrent density distribution inside membrane, the counter-flow cases show more uniform profile across themembrane than the co-flow cases due to more uniform reactant gas supply.
Abstract
A numerical analysis was performed to study PEMFC performance characteristics depending on the flowdirection of cathode reactant gas, cathode relative humidity, and porosity of gas diffusion layer. As cathoderelative humidity decreases and porosity increases, current density increases due to better diffusion of reactantgas to cathode surface. As current density increases, power density increases initially and then decreases withits maximum located around current density value of 2.2 Amperes per square centimeter. From the analysis ofcurrent density distribution inside membrane, the counter-flow cases show more uniform profile across themembrane than the co-flow cases due to more uniform reactant gas supply.
참고문헌 (10)
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