Recent Progress of SOFC Combined Cycle System with Segmented-in-Series Tubular Type Cell Stack at MHPS

Mitsubishi Hitachi Power Systems, Ltd. (MHPS) is one of the first companies to focus on the potential of the Solid Oxide Fuel Cells (SOFC) as a component of large-scale power plant and has promoted segmented-in-series tubular type cell, the module and the system development since the 1980s. We are developing for commercialization of an SOFC-micro gas turbine (MGT) system from several hundred to several MW class. Recently prototype of a 250 kw class SOFC-MGT hybrid system was operated at Tokyo Gas Senju Techno Station. This system was very stable without voltage degradation at the rated for 4,100 hours. At the same time, we have started the development of fundamental technologies for realization of SOFC-Gas Turbine (GT)-Steam Turbine (ST) triple combined cycle system that aims to achieve more than 70% of power generation efficiency. We report the recent progress of the SOFC-micro gas turbine (MGT) hybrid system and development of triple combined cycle system.