http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
실리콘으로 제작된 소형 연료 전지에서 가습 조건의 최적화
권오중,원호연,김재정,Kwon, Oh-Joong,Won, Ho-Youn,Kim, Jae-Jeong 한국전기화학회 2007 한국전기화학회지 Vol.10 No.2
연료 전지의 소형화를 위하여 흑연(graphite)를 기본으로 하는 분리판을 실리콘분리판으로 대체하였으며, 실리콘 분리판과 active area가 $4cm^2$인 MEA (membrane electrode assembly)와 결합하여 단위 전지를 제작하였다. 단위 전지에 공급되는 수소와 산소의 공급량은 고정하고 가습기의 구동 온도만을 변화시키면서 단위 전지의 성능을 확인하고 최적의 가습 조건을 결정하였다. 또한 가습 조건이 실리콘으로 제작된 연료 전지 스택에 미치는 영향을 알아보기 위하여 실리콘 분리판과 2개의 MEA로 이루어진 스택을 제작하여 가습 조건의 영향을 알아보고 실리콘 분리판으로 제작된 연료전지 스택의 문제점 및 특징을 알아보았다. Single fuel cell was fabricated with a MEA (membrane electrode assembly) that had a $4cm^2$ active area and with silicon bipolar plates those were introduced to miniaturize the fuel cell by replacing heavy weight graphite plates. Optimum humidification condition for the single cell was selected based on performance results obtained varying humidifier temperature at a fixed feed rate of hydrogen and oxygen. Furthermore, to study the effect of humidification condition on the performance of a fuel cell stack, the fuel cell stack consisting of two MEAs and silicon bipolar plates was studied, then problems and characteristics of silicon-based fuel cell stack were examined.
정중기(Jung Kee Chung),서준석(Jun Suk Suh),홍인규(Inn Gyu Hong),권오중(Oh Joong Kwon),박연호(Yeon Ho Park),서경석(Kyung Suk Suh),김선희(Sun Whe Kim),박용현(Yong Hyun Park) 대한소화기학회 1997 대한소화기학회지 Vol.29 No.1
N/A Background/Aims: Patient with choledocholithiasis(CL) may have residual stones postoperatively and cholodochoscopic extraction became one of the main therapeutic modalities recently. Analysing the incidence of postoperative residual stones in cholodocholithiasis patients and the effect of choledochoscopic stone remova], we may have the necessity of some modification of operation procedures such as cutaneous jejunostomy. Methods: Analysing c]inical data of 64 patients who were confirmed as having biliary stones during operation and were c>perated during the 4 year period until 1994, we investigated the relationship between operation modality and incidence of residual stone and effectiveness of endoscopic extraction and of medical management on postoperative periods. Results: Residua) stones(RS) were noted in 35.9%(23/64) of operated choledocholithiasis patients and by operative procedure, choledochojejunostomy cases had the highest incidence of RS at 58.3%. Complete removal of RS by choledochoscopy was achieved in 8 of 14 cases and two cases of recurrent and 4 case of remaining stones were managed medically. Conclusions: In managing CL patients, left lobectomy of liver is one of tbe definite treatment modalities in left sided CL and in right sided CL with high suspicion of RS, additive cutaneous jejunostomy on conventional choledochojejunostomy may have beneficial ro)e in long term postoperative choledochoscopic trial. (Korean J Gastroenterol 1997; 29:93 - 101)