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분체공학,유동층,고분자,재료(무기, 유기) : 졸-겔법으로 제조된 복합 알루미나 미분체의 첨가제에 의한 구조적 특성 비교
이정운 ( Jung Woon Lee ),윤호성 ( Ho Sung Yoon ),채의석 ( U Suk Chae ),박한진 ( Han Jin Park ),황운연 ( Un Yeon Hwang ),박형상 ( Hyung Sang Park ),박달령 ( Dal Ryung Park ),유승준 ( Seung Joon Yoo ) 한국화학공학회 2005 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.43 No.4
이상조건하에서 가정용 연료전지 시스템의 성능 및 안전성 평가에 관한 연구
이정운(Lee, Jung-Woon),서원석(Seo, Won-Seok),김영규(Kim, Young-Gyu) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.10
Fuel cell systems have witnessed remarkable development in recent years as they offer a clean and efficient alternative for power generation. Testing was conducted to determine the safety performance of a residential fuel cell system when subjected to abnormal operation condition, especially for voltage sag and fuel cut. In case of voltage sag to 198V, its arriving time at rated power had shown a slight lag but there wasn't any noticeable change when operating it between rated voltage(220V) and 10% voltage sag(198V). In case of fuel cut, it also showed stable shut-down characteristics. The test results are being used to develop a new safety evaluation for residential fuel cell system.
이정운(Lee, Jung-Woon),서원석(Seo, Won-Seok),김영규(Kim, Young-Gyu) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.05
Testing was conducted to determine the performance of a residential fuel cell system when subjected to DSS and WSS operation, especially for start-up and shut-down characteristics. In terms of start-up time, it took about 70min to start output power generation and stably to reach 1kW at cold start. Measurement of the characteristics of heat and power generation were carried out at start-up and shut-down time. Fuel gas is used for heating both reformer and stack from start-up to the beginning of power generation. In terms of start-up and shut-down characteristics, it was important to control the reformer temperature precisely. The average output water temperature during the rated output operation(960W) was 63.2?C constantly. The results of the investigation are being used to develop a new test protocols for residential fuel cell system.