A novel trigeneration system based on solid oxide fuel cell-gas turbine integrated with compressed air and thermal energy storage concepts: Energy, exergy, and life cycle approaches

[Display omitted] •A novel trigeneration system comprised of fuel cell-gas turbine-energy storage.•Using energy storage systems to recover waste heat and surplus power of the prime mover.•A system with a round-trip efficiency of 77 % and an exergy efficiency of 46 %.•Low GHG emissions of 0.27 kgCO2e...

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Veröffentlicht in:Sustainable cities and society 2021-03, Vol.66, p.102667, Article 102667
Hauptverfasser: Roushenas, Ramin, Zarei, Ehsan, Torabi, M.
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Sprache:eng
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Zusammenfassung:[Display omitted] •A novel trigeneration system comprised of fuel cell-gas turbine-energy storage.•Using energy storage systems to recover waste heat and surplus power of the prime mover.•A system with a round-trip efficiency of 77 % and an exergy efficiency of 46 %.•Low GHG emissions of 0.27 kgCO2e/kWh at the pump-to-production stage.•Low emissions issues and freshwater consumption at the well-to-production stage. Energy storage technologies are considered as an available solution to improve the reliability of conventional energy systems as well as responding to the peak load. This paper offers a novel integrated system with remarkable potential to provide users’ electricity, heating, and cooling demand for small-scale distributed generation applications. The main objective of this research is improving thermodynamic efficiency as well as mitigating emissions of the conventional solid oxide fuel cell-gas turbine (SOFC-GT) hybrid system with the option of peak-shaving. A compressed air energy storage and thermal energy storage are employed to store the surplus power and recover the waste heat of the prime mover, respectively. The proposed system operates with a round-trip efficiency of 76.8 % and exergy efficiency of 46 % under the design condition: 8 h of off-peak period with 97.5 kW power demand and 8 h of peak period with 305.6 kW power demand; 113.4 kW cooling capacity; 37.4 m3 hot water production. Furthermore, the evaluation of environmental impacts indicates that GHG emissions are low at 0.27 kgCO2e/kWh. Also, the life cycle assessment shows that well-to-production GHG emissions of the proposed integrated system during a round-trip of operation are 1890 kgCO2e which is 6.6 % lower than the conventional SOFC-GT.
ISSN:2210-6707
2210-6715
DOI:10.1016/j.scs.2020.102667