Abstract
SOFC is able to attain extremely high efficiency over 70% as LHV, as gas turbine combined cycle system. Mitsubishi Heavy Industries (MHI) has been developing SOFC since 1984. Based on developed technologies, now MHI is on the step of integrating SOFC power generation system. MHI has improved the components and the control technology for the combined cycle system, that is, improvement of cell stack, verification of pressurized operation and control of SOFC module and the combustor for low- calorie fuel. In 2006, MHI managed to operate the combined cycle system with maximum combined power output of 75kW, for the first time in Japan. And now, MHI is ready to manufacture a 200kW class SOFC-MGT combined cycle system, which will be operated in 2007.