Modelling for part-load operation of solid oxide fuel cell–gas turbine hybrid power plant

This paper presents the work on part-load operation of a power generation system composed of a solid oxide fuel cell and a gas turbine (SOFC–GT) which operate on natural gas. The system consists of an internal reforming SOFC (IRSOFC) stack, an external combustor, two turbines, two compressors, two r...

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Bibliographic Details
Published in:Journal of power sources 2003-03, Vol.114 (2), p.213-227
Main Authors: Chan, S.H., Ho, H.K., Tian, Y.
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Hybrid power system
Installations for energy generation and conversion: thermal and electrical energy
Part-load operation
SOFC stack modelling
Thermal power plants
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Summary:This paper presents the work on part-load operation of a power generation system composed of a solid oxide fuel cell and a gas turbine (SOFC–GT) which operate on natural gas. The system consists of an internal reforming SOFC (IRSOFC) stack, an external combustor, two turbines, two compressors, two recuperators and one heat-recovery steam generator (HRSG). Based on experience in different levels of modelling of the fuel cell, fuel cell stack and integrated system and the inherent characteristics of a IRSOFC–GT hybrid power plant, a practical approach for simplifying part-load operation of the system is proposed. Simulation results show that an IRSOFC–GT hybrid system could achieve a net electrical efficiency and system efficiency (including waste heat recovery for steam generation) of greater than 60 and 80%, respectively, under full-load operation. Due to the complexity of the interaction of the components and safety requirements, the part-load performance of a IRSOFC–GT hybrid power plant is poorer than that under full-load operation.
ISSN:0378-7753
1873-2755
DOI:10.1016/S0378-7753(02)00613-4