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Gas turbine size optimization in a hybrid system considering SOFC degradation
Thermochemical Power Group, Università di Genova, Italy.
Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.ORCID-id: 0000-0001-6101-2863
U.S. DOE National Energy Technology Laboratory, Morgantown, United States.
Thermochemical Power Group, Università di Genova, Italy.
2018 (engelsk)Inngår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 230, s. 855-864Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The coupling of a pressurized solid oxide fuel cell (SOFC) and a gas turbine has been proven to result in extremely high efficiency and reduced emissions. The presence of the gas turbine can improve system durability compared to a standalone SOFC, because the turbomachinery can supply additional power as the fuel cell degrades to meet the power request. Since performance degradation is an obstacles to SOFC systems commercialization, the optimization of the hybrid system to mitigate SOFC degradation effects is of great interest. In this work, an optimization approach was used to innovatively study the effect of gas turbine size on system durability for a 400 kW fuel cell stack. A larger turbine allowed a bigger reduction in SOFC power before replacing the stack, but increased the initial capital investment and decreased the initial turbine efficiency. Thus, the power ratio between SOFC and gas turbine significantly influenced system economic results.

sted, utgiver, år, opplag, sider
Elsevier Ltd , 2018. Vol. 230, s. 855-864
Emneord [en]
Design optimization, Economic analysis, Hybrid systems, SOFC degradation
HSV kategori
Identifikatorer
URN: urn:nbn:se:mdh:diva-40967DOI: 10.1016/j.apenergy.2018.09.027ISI: 000448226600064Scopus ID: 2-s2.0-85053071574OAI: oai:DiVA.org:mdh-40967DiVA, id: diva2:1249710
Tilgjengelig fra: 2018-09-20 Laget: 2018-09-20 Sist oppdatert: 2018-11-08bibliografisk kontrollert

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