한국신재생에너지학회:학술대회논문집
- 2006.11a
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- Pages.372-375
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- 2006
Numerical analysis of chromium deposition through the SOFC cathode channel
고체 산화물 연료전지의 공기극 유로내 크롬 피독에 관한 전산해석
- Park, Joon-Guen ;
- Bae, Joong-Myeon ;
- Lee, Shin-Ku ;
- Nabielek, Heinz (Juelich, Germany)
- Published : 2006.11.23
Abstract
SOFC is a high temperature fuelcell with many advantages, but it also have several demerits. One of the Issues is cathode poisoning of Cr coming from stainless steel interconnects. Diffusion process of Cr evaporated from the surface of interconnect steel was calculated by using CFD technique to understand factors for Cr deposition. It has been cleared that factors concerned in Cr deposition and how they affect Cr deposition. Major variables for Cr deposit ion are diffusion coefficient, air velocity and temperature If diffusion coefficient decreases, Cr concentration increases in the air but decreases on the cathode surface. Increasing in air velocity, Cr concentration decreases in the air and on the cathode surface. Increase in temperature leads to rising Cr concentration on the cathode surface because of diffusion coefficient increment.