Analysis of performance of SOFC/GT hybrid systems considering size-dependent perfoimance of gas turbines

No Sung Myung; Sung Ku Park; Tong Seop Kim

doi:10.3795/KSME-B.2011.35.4.399

Analysis of performance of SOFC/GT hybrid systems considering size-dependent perfoimance of gas turbines

No Sung Myung, Sung Ku Park, Tong Seop Kim

Inha University

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

This study analyzes the performance of hybrid power systems combining a solid oxide fuel cell (SOFC) and a gas turbine (GT). Research focus is given to the influence of the size-dependent gas turbine performance on hybrid system performance. Three hybrid systems adopting different gas turbines (kW, sub-MW, multi-MW classes) are designed. As the gas turbine power increases (i.e. as the gas turbine performance enhances), the gas turbine power portion increases and the hybrid system efficiency increases. The hybrid system shows efficiency improvement over the SOFC only system even in the case where the gas turbine net power is nearly zero. The increase of gas turbine pressure ratio contributes to the net hybrid system power output in all of the three cases, while system efficiency is almost independent on the pressure ratio.

Original language	English
Pages (from-to)	399-407
Number of pages	9
Journal	Transactions of the Korean Society of Mechanical Engineers, B
Volume	35
Issue number	4
DOIs	https://doi.org/10.3795/KSME-B.2011.35.4.399
State	Published - Apr 2011

Keywords

Efficiency
Gas turbine
Hybrid system
Power
Pressure ratio
SOFC

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10.3795/KSME-B.2011.35.4.399

Cite this

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abstract = "This study analyzes the performance of hybrid power systems combining a solid oxide fuel cell (SOFC) and a gas turbine (GT). Research focus is given to the influence of the size-dependent gas turbine performance on hybrid system performance. Three hybrid systems adopting different gas turbines (kW, sub-MW, multi-MW classes) are designed. As the gas turbine power increases (i.e. as the gas turbine performance enhances), the gas turbine power portion increases and the hybrid system efficiency increases. The hybrid system shows efficiency improvement over the SOFC only system even in the case where the gas turbine net power is nearly zero. The increase of gas turbine pressure ratio contributes to the net hybrid system power output in all of the three cases, while system efficiency is almost independent on the pressure ratio.",

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AB - This study analyzes the performance of hybrid power systems combining a solid oxide fuel cell (SOFC) and a gas turbine (GT). Research focus is given to the influence of the size-dependent gas turbine performance on hybrid system performance. Three hybrid systems adopting different gas turbines (kW, sub-MW, multi-MW classes) are designed. As the gas turbine power increases (i.e. as the gas turbine performance enhances), the gas turbine power portion increases and the hybrid system efficiency increases. The hybrid system shows efficiency improvement over the SOFC only system even in the case where the gas turbine net power is nearly zero. The increase of gas turbine pressure ratio contributes to the net hybrid system power output in all of the three cases, while system efficiency is almost independent on the pressure ratio.

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Analysis of performance of SOFC/GT hybrid systems considering size-dependent perfoimance of gas turbines

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Keywords

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