평판형 고체산화물 연료전지 스택의 내부개질 특성 연구
Study on Internal Reforming Characteristic of Planar Type Solid Oxide Fuel Cell Stack
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This paper presents the performance characteristics of a planar type solid oxide fuel cell (SOFC) stack under variousinternal reforming and fuel utilization conditions. The Research Institute of Industrial Science &Technology (RIST) developed the5-cell stack using a 20×20 cm2 anode supported planar cell with an active area of 324 cm2. In this work, current-voltage characteristictest, fuel utilization test, continuous operation, and internal reforming test were carried out sequentially for 385 hours at a furnacetemperature of 700℃. The influence of fuel utilization and internal reforming on the stack performance was analyzed. When the 5-cellstack was tested at a current of 162A with a corresponding fuel utilization of 50~80% (internal reforming of 50%) and air utilization of15%, the stack power was approximately 637~650W. Under continuous operation conditions, performance degradation rate was1.89%/kh for 262 hours. The internal reforming characteristics of the stack were measured at a current of 162A with a correspondingfuel utilization of 60~80% (internal reforming of 50~90%) and air utilization of 15%. As fuel utilization and internal reforming ratioincreased, the stack power was decreased. The stack power change due to the internal reforming ratio difference was decreased withincreasing fuel utilization.
Abstract
This paper presents the performance characteristics of a planar type solid oxide fuel cell (SOFC) stack under variousinternal reforming and fuel utilization conditions. The Research Institute of Industrial Science &Technology (RIST) developed the5-cell stack using a 20×20 cm2 anode supported planar cell with an active area of 324 cm2. In this work, current-voltage characteristictest, fuel utilization test, continuous operation, and internal reforming test were carried out sequentially for 385 hours at a furnacetemperature of 700℃. The influence of fuel utilization and internal reforming on the stack performance was analyzed. When the 5-cellstack was tested at a current of 162A with a corresponding fuel utilization of 50~80% (internal reforming of 50%) and air utilization of15%, the stack power was approximately 637~650W. Under continuous operation conditions, performance degradation rate was1.89%/kh for 262 hours. The internal reforming characteristics of the stack were measured at a current of 162A with a correspondingfuel utilization of 60~80% (internal reforming of 50~90%) and air utilization of 15%. As fuel utilization and internal reforming ratioincreased, the stack power was decreased. The stack power change due to the internal reforming ratio difference was decreased withincreasing fuel utilization.
참고문헌 (7)
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