The coupling of solid oxide fuel cells (SOFCs) and recuperated gas turbines (GTs) in a hybrid system has the potential to lead to efficiencies exceeding 60%. SOFC/GT hybrids have been proposed at power outputs from 20 MW down to power outputs as low as 25 kW. The optimum configuration for high and low power outputs is therefore likely to be significantly different. This paper proposes a simple model of the SOFC/GT hybrid to investigate the desired flow rate and pressure ratio for optimum hybrid efficiency with varying component performance and, hence, varying inferred size. The overall hybrid specific power will be dominated by the fuel cell and is therefore of secondary importance when matching with a gas turbine. The results presented suggest that hybrid cycles with total power output of the order MW or greater are preferable.
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September 2010
Technical Briefs
The Effect of Size on Optimization of Solid Oxide Fuel Cell/Gas Turbine Hybrid Cycles
Michael J. Brear,
Michael J. Brear
Department of Mechanical Engineering,
University of Melbourne
, Parkville, Victoria 3010, Australia
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Michael J. Dunkley
Michael J. Dunkley
Department of Mechanical Engineering,
University of Melbourne
, Parkville, Victoria 3010, Australia
Search for other works by this author on:
Michael J. Brear
Department of Mechanical Engineering,
University of Melbourne
, Parkville, Victoria 3010, Australia
Michael J. Dunkley
Department of Mechanical Engineering,
University of Melbourne
, Parkville, Victoria 3010, AustraliaJ. Eng. Gas Turbines Power. Sep 2010, 132(9): 094502 (4 pages)
Published Online: June 17, 2010
Article history
Received:
April 19, 2009
Revised:
August 18, 2009
Online:
June 17, 2010
Published:
June 17, 2010
Citation
Brear, M. J., and Dunkley, M. J. (June 17, 2010). "The Effect of Size on Optimization of Solid Oxide Fuel Cell/Gas Turbine Hybrid Cycles." ASME. J. Eng. Gas Turbines Power. September 2010; 132(9): 094502. https://doi.org/10.1115/1.4000592
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