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Modeling of a Novel Atmospheric SOFC/GT Hybrid Process and Comparison with State-of-the-Art SOFC System Concepts

: Cardenas de la Cruz, Cesar Teodoro; Herz, Gregor; Reichelt, Erik; Jahn, Matthias

Fulltext ()

Fuel Cells 20 (2020), No.5, pp.608-623
ISSN: 1615-6846
ISSN: 1615-6854
Journal Article, Electronic Publication
Fraunhofer IKTS ()
anode off-gas recirculation; electric efficiency; SOFC / GT; solid oxide fuel cell; sub-atmospheric gas turbine

A novel concept for an atmospheric SOFC hybrid system applying a sub-atmospheric gas turbine is proposed. Based on a developed process model suitable operating conditions are studied. The resulting performance is compared to different state-of-the-art SOFC system concepts. The comparison shows that pressurized SOFC/GT systems offer the highest electric efficiency. The novel concept as well as a two-stage SOFC system offer lower efficiencies, but still well above 60 %. However, avoiding the complex system requirements of pressurized SOFC/GT systems, these concepts are promising for highly efficient electricity generation.