분리형 개질기를 이용한 고효율 일체형 개질기 개발에 관한 연구

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 29; no. 1; pp. 11 - 18
• Main Authors: 박상현(Sang-hyoun Park), 김철민(Chul-min Kim), 손성효(Sung-hyo Son), 장세진(Se-jin Jang), 김재동(Jae-dong Kim), 방완근(Wan-keun Bang), 이상용(Sang-yong Lee)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2018
• Subjects: 기계공학; 연료전지; 건물용 연료전지; Reformer; PEMFC; 고분자 연료전지; 개질기; 연료처리장치; Residential fuel cell; Fuel cell; Fuel processor
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/KHNES.2018.29.1.11

A high efficiency integrated reforming system for improving the efficiency of the 5 kW PEMFC system used as the back up power of building was studied. The separated reforming system consisted of three parts - A steam reformer with two stage concentric circular shape, a heat exchanger type steam generator and a CO shift reactor. Temperature and steam carbon ratio (SCR) were control variables during operation. The operating conditions were optimized based on the thermal efficiency of the steam reformer as reformate gas composition changes at different temperature. In experiments, water was fully vaporized in the steam generator up to SCR 3.5 and the maximum thermal efficiency was achieved at the operating temperature around $700^{\circ}C$ in the steam reforming reactor. With the results of the separated reforming system research, we improved the shape of high efficiency integrated reformer. The performance evaluation of the integrated reformer was based on optimized operating conditions in SCR 3.5. As a result, the developed integrated reforming system maintained an efficiency of 76% and constant performance over 3,000 hours.