This study aims to present various design aspects and realizable performance of the natural gas fired semi-closed oxy-fuel combustion combined cycle (SCOC-CC). The design parameters of the cycle are set up on the basis of the component technologies of today’s state-of-the-art gas turbines with a turbine inlet temperature between 1400 °C and 1600 °C. The most important part of the cycle analysis is the turbine cooling, which considerably affects the cycle performance. A thermodynamic cooling model is introduced in order to predict the reasonable amount of turbine coolant needed to maintain the turbine blade temperature of the SCOC-CC at the levels of those of conventional gas turbines. The optimal pressure ratio ranges of the SCOC-CC for two different turbine inlet temperature levels are researched. The performance penalty due to the CO2 capture is examined. The influences of the purity of the oxygen provided by the air separation unit on the cycle performance are also investigated. A comparison with the conventional combined cycle, adopting a postcombustion CO2 capture, is carried out, taking into account the relationship between the performance and the CO2 capture rate.
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e-mail: kts@inha.ac.kr
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November 2012
Gas Turbines: Cycle Innovations
Evaluation of Design Performance of the Semi-Closed Oxy-Fuel Combustion Combined Cycle
H. J. Yang,
H. J. Yang
Graduate School,
Inha University
, Incheon, 402-751 Korea
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D. W. Kang,
D. W. Kang
Graduate School,
Inha University
, Incheon, 402-751 Korea
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J. H. Ahn,
J. H. Ahn
Graduate School,
Inha University
, Incheon, 402-751 Korea
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T. S. Kim
T. S. Kim
Department of Mechanical Engineering,
e-mail: kts@inha.ac.kr
Inha University
, Incheon, 402-751 Korea
Search for other works by this author on:
H. J. Yang
Graduate School,
Inha University
, Incheon, 402-751 Korea
D. W. Kang
Graduate School,
Inha University
, Incheon, 402-751 Korea
J. H. Ahn
Graduate School,
Inha University
, Incheon, 402-751 Korea
T. S. Kim
Department of Mechanical Engineering,
Inha University
, Incheon, 402-751 Korea
e-mail: kts@inha.ac.kr
J. Eng. Gas Turbines Power. Nov 2012, 134(11): 111702 (10 pages)
Published Online: September 28, 2012
Article history
Received:
June 18, 2012
Revised:
June 29, 2012
Online:
September 28, 2012
Published:
September 28, 2012
Citation
Yang, H. J., Kang, D. W., Ahn, J. H., and Kim, T. S. (September 28, 2012). "Evaluation of Design Performance of the Semi-Closed Oxy-Fuel Combustion Combined Cycle." ASME. J. Eng. Gas Turbines Power. November 2012; 134(11): 111702. https://doi.org/10.1115/1.4007322
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