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http://dx.doi.org/10.3795/KSME-B.2011.35.4.399

Analysis of Performance of SOFC/GT Hybrid Systems Considering Size-Dependent Performance of Gas Turbines  

Myung, No-Sung (Dept. of Mechanical Engineering, Inha Univ.)
Park, Sung-Ku (Dept. of Mechanical Engineering, Inha Univ.)
Kim, Tong-Seop (Dept. of Mechanical Engineering, Inha Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.35, no.4, 2011 , pp. 399-407 More about this Journal
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.
Keywords
SOFC; Gas Turbine; Hybrid System; Power; Efficiency; Pressure Ratio;
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Times Cited By KSCI : 4  (Citation Analysis)
Times Cited By SCOPUS : 0
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