| 초록 |
Anode-supported micro-tubular SOFC (solid oxide fuel cell) systems have superior characteristics to planar SOFC in view of thermal and mechanical properties. Therefore, in order to reduce start-up time for APU (auxiliary power unit) application, we should develop a micro-tubular type SOFC system. However, there are many problems in process and stack design of a micro-tubular type SOFC system. In the present work, we developed a 700W anode-supported micro-tubular SOFC stack for APU application. For this purpose, we have first designed a single cell by optimization of current collecting method, brazing method and the length of tubular cell, and then we have fabricated a high power single cell showing cell performance of 0.542 A/cm2 at 0.7V and 800oC (17.5 W / cell). After that we designed fuel manifold by adopting simulation method to uniformly supply fuel gas and oxygen gas to the inside and to the outside of single unit cells, respectively. Finally, we can construct a 700W anode-supported micro-tubular SOFC stack by stacking the bundles of cells. |
