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유병준(Byung June You),김동섭(Tong Seop Kim),이영덕(Young Duk Lee),안국영(Kook Young Ahn) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
Performance of PEM fuel cell power generation systems and hybrid systems combining a PEMFC with a gas turbine have been evaluated. PEM fuel cell systems with two different reforming methods(steam reforming and autothermal reforming) were comparatively analyzed. Configurations of both PEM fuel cell systems have been revised to accommodate a gas turbine, resulting in PEMFC/GT hybrid systems. Performance of the two hybrid systems were analyzed and compared with those of PEM only systems. Influences of major design parameters on system performance were investigated
유병준(Byung June You),김동섭(Tong Seop Kim),이영덕(Young Duk Lee),안국영(Kook Young Ahn) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Design performances of various configurations of the PEMFC/GT hybrid systems have been evaluated. Based on PEMFC adopting steam reforming, various system configurations (one ambient pressure configuration and three different pressurized configurations) were designed and their performances were compared. Their Performances are also compared with the reference PEMFC system. Influences of turbine inlet temperature, pressure ratio on the hybrid systems performance were investigated and design ranges exhibits better efficiency than the PEMFC system were presented. One of the pressurized system may have much higher efficiency than the PEMFC system, while other systems hardly provide efficiency upgrade.
하이브리드형 고분자전해질 연료전지 시스템의 부분부하 성능해석
지승원(Seung Won Ji),유병준(Byung June You),김동섭(Tong Seop Kim),손정락(Jeong Lak Sohn),이영덕(Young Duk Lee),안국영(Kook Young Ahn) 대한기계학회 2008 大韓機械學會論文集B Vol.32 No.11
The paper addresses modeling and analysis of the part load performance of a hybrid fuel cell system integrating a polymer electrolyte membrane fuel cell(PEMFC) and a gas turbine(GT). The system is a pressurized one where the working pressure of the PEMFC is higher than the ambient pressure. In addition to the two major components, the system also includes auxiliary parts such as a steam reformer, a humidifier, and afterburner and so on. Based on design analysis, component off-design models are incorporated in the analysis program and part load operation is simulated. The mode for the part load operation of the PEMFC/GT hybrid system is a variable rotational speed operation. The operating characteristics and variations in the system efficiency and component performance parameters at part load are analyzed.
PEMFC/GT 하이브리드 시스템의 부분부하 성능 해석
지승원(Seung Won Ji),유병준(Byung June You),김동섭(Tong Seop Kim),손정락(Jeong Lak Sohn),안국영(Kook Young Ahn) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
The paper addresses off-design analysis of a hybrid fuel cell system integrating a low temperature polymer electrolyte membrane fuel cell(PEMFC) with a gas turbine(GT). The system is a pressurized one where the working pressure of the PEMFC is higher than ambient pressure. In addition to the two major components, the system also includes auxiliary parts such as a steam reformer, a humidifier, and afterburner and so on. Based on design analysis, component off-design models are incorporated in the analysis program and part load operation is simulated. The mode for the part load operation of the PEMFC/GT hybrid system is a variable rotational speed operation. The operating line, the system efficiency and important component performance parameters at part load are analysed in depth. This study show that as load decreases, the part load efficiency generally increases.
소형 가압형 연료전지/가스터빈 하이브리드 시스템의 성능 비교해석
박성구(Sung Ku Park),유병준(Byung June You),김동섭(Tong Seop Kim),손정락(Jeong L. Sohn),안국영(Kook Young Ahn) 대한기계학회 2008 大韓機械學會論文集B Vol.32 No.9
Design performances of the fuel cell / gas turbine hybrid power generation systems based on two different fuel cells (PEMFC, SOFC) have been comparatively analyzed. In each system, the fuel cell operates at an elevated pressure corresponding to the compressed air pressure of the gas turbine. Both internally and externally reformed systems were analyzed for the SOFC hybrid system. Component design parameters of 10㎾ class small systems are assumed. For all hybrid systems, increasing the turbine inlet temperature increases the power portion of the gas turbine. With increasing the turbine inlet temperature, system efficiency decreases in the PEMFC system and the internally reformed SOFC system while that of the externally reformed SOFC system increases slightly. The internally reformed SOFC hybrid system is predicted to exhibit the best system efficiency.