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Brayton is entering our third year of development of an advanced hybrid fuel cell system, under the sponsorship of the University of Alaska’s Arctic Research Center.  In 2005 Brayton completed a comprehensive modeling study of hybrid gas-turbine/fuelcell powerplants. This study identified and ranked various approaches based on performance and cost factors.  Continuing into 2006, we also performed a preliminary design for a microturbine engine dedicated specifically to hybrid application, incorporating the innovative shock-in-rotor compressor and expander under development by Ramgen Power Systems.  Also during that period, we explored the life and cost of high-temperature heat exchangers for indirect fuel cells, under sponsorship of Concurrent Technologies and the US DoD.   During most of 2006, Brayton concentrated on the development of a comprehensive model of a unique hybrid solid oxide fuel cell (SOFC) system. This work led to the design of a novel high-efficiency intercooled recuperated (ICR) gas turbine system that provides optimal control over the SOFC operation. Brayton’s  ICR gas turbine design has also attracted the interest of Capstone Turbine, a leading microturbine manufacturer.  Its attributes, including exceptional efficiency over a wide operating range, light-weight, and the economical design are well suited to vehicular applications; both military and as a hybrid-electric bus power plant.