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3 kW급 고분자전해질 연료전지 스택의 운전특성 연구
A Study on Operational Characteristics of the 3 kW Class PEMFC Stack
Hyung-Joon Choi
Sang-Yeoul Ahn
Sung-Ah Cho
Jeong-Kyu Lee
Joon-Pyo Shim
Suk-Yal Cha
Heung Yong Ha
Seong-Ahn Hong
Tae Won Lim1
In-Hwan Oh†
한국과학기술연구원 전지/연료전지연구센터 1현대자동차(주) 선행연구실
Battery and Fuel Cell Research Center, Korea Institute of Science and Technology, Korea 1Advanced Research Group, Hyundai Moter Company, Korea
oih@kistmai.kist.re.kr
HWAHAK KONGHAK, August 2000, 38(4), 550-555(6), NONE
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Abstract
전극 유효면적이 200 cm2인 단위전지를 39단 적층하여 향류흐름형 스택을 제작하고 이에 대한 운전특성을 조사하였다. 작동압력 1기압, 작동온도 79℃의 조건 하에서 반응기체로 수소/산소를 사용하였을 경우의 최대출력은 3.94 kW(0.51 W/cm2cell)이었으며, 수소/공기를 사용하였을 경우는 2.53 kW(0.32 W/cm2cell)였다. 스택 내의 각 단위전지들에 대한 전압손실 요인을 분석한 결과 전압손실은 주로 전극의 분극저항 때문인 것으로 나타났다. 단위전지들 간에 일부 불균일한 성능 분포 및 온도분포가 관찰되었으나 90시간 이상의 연속운전이 가능하였다.
A counter-flow type 39-cell proton exchange membrane fuel cell(PEMFC)stack with an effective electrode area of 200 cm2 has been assembled and its operational characteristics were investigated. Under the condition of atmospheric pressure and 75℃, the maximum power of the stack was 3.94 kW(0.51 W/cm2/cell) and 2.53 kW(0.32 W/cm2/cell) for H2/O2 and H2/air, respectively. The analysis of the factors causing voltage losses revealed that polarzation resistance of the electrodes was the main reason. Although ununiform distribution in voltage and temperature of the unit cells was observed, the continuous operation of the stack beyond 90 hours was possible.
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