Thermo-economic modeling of a solid oxide fuel cell/gas turbine power plant with semi-direct coupling and anode recycling |
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| Authors: | Denver F Cheddie Renique Murray |
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| Affiliation: | 1. Center for Energy Studies, University of Trinidad and Tobago, Point Lisas Campus, Esperanza Road, Brechin Castle, Couva, Trinidad and Tobago;2. Natural Gas Institute of the Americas, University of Trinidad and Tobago, Point Lisas Campus, Esperanza Road, Brechin Castle, Couva, Trinidad and Tobago |
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| Abstract: | Power generation using gas turbine (GT) power plants operating on the Brayton cycle suffers from low efficiencies, resulting in poor fuel to power conversion. A solid oxide fuel cell (SOFC) is proposed for integration into a 10 MW gas turbine power plant, operating at 30% efficiency in order to improve system efficiencies and economics. The SOFC system is semi-directly coupled to the gas turbine power plant, with careful attention paid to minimize the disruption to the GT operation. A thermo-economic model is developed for the hybrid power plant, and predicts an optimized power output of 21.6 MW at 49.2% efficiency. The model also predicts a breakeven per-unit energy cost of USD 4.70 ¢/kWh for the hybrid system based on futuristic mass generation SOFC costs. Results show that SOFCs can be semi-directly integrated into existing GT power systems to improve their thermodynamic and economic performance. |
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| Keywords: | Thermo-economic model Solid oxide fuel cell Gas turbine Semi-direct coupling |
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