Comparative Evaluation of the Effect of Turbine Configuration on the Performance of Heavy-Duty Gas Turbines

Kim, Tong Seop; Ro, Sung Tack

doi:10.1115/95-gt-334

Cited by 19 publications

(4 citation statements)

References 3 publications

(5 reference statements)

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“…The fuel in the SCOC-CC is also natural gas, as in conventional combined cycles. Then, a thermodynamic cooling model [19] was used to calculate the coolant fiows. It was assumed that the pressure of the natural gas supplied to the plant is 30 bar.…”

Section: Cycle Configuration and Modelingmentioning

confidence: 99%

Evaluation of Design Performance of the Semi-Closed Oxy-Fuel Combustion Combined Cycle

Yang

Kang

Ahn

et al. 2012

Journal of Engineering for Gas Turbines and Power

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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-ofthe-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 thermodyruxmic 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 tn'o different turbitie iniet 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 peiformance 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 petformance and the CO2 capture rate. Journal of Engineering for Gas Turbines and PowerCopyright ©2012 by ASME NOVEMBER2012, Vol. 134 / 111702-1 that of the conventional combined cycle adopting a postcombustion CO2 capture from the perspective of the relationship between the performance and the capture rate.

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Section: Cycle Configuration and Modelingmentioning

confidence: 99%

Evaluation of Design Performance of the Semi-Closed Oxy-Fuel Combustion Combined Cycle

Yang

Kang

Ahn

et al. 2012

Journal of Engineering for Gas Turbines and Power

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“…total pressure P mass averaged total pressure, see equation 12• static pressure cooling on the overall performance of gas turbine engines (Kawaike et al, 1984, El-Masri, 1986, Kim and Ro, 1995. To predict the performance of an engine, however, there should be a clear understanding of the phenomena in cooled turbines.…”

Section: Nomenclature Amentioning

confidence: 99%

Performance Analysis of a Turbine Stage Having Cooled Nozzle Blades With Trailing Edge Ejection

Kim

Lee

et al. 1996

ASME 1996 Turbo Asia Conference

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This work presents an aerothermodynamic modeling of a cooled turbine blade and the performance analysis of a turbine stage having cooled nozzle blades with trailing edge coolant ejection. A mean line analysis, based on the well-known Ainley-Mathieson scheme, is adopted for the basic loss prediction of the blade rows without cooling. A unique model regarding the interaction between coolant and main gas is proposed. The interactions considered are the heat transfer from main gas to coolant and the temperature and pressure losses by the mixing of two streams due to the trailing edge coolant ejection. For a model turbine stage with nozzle cooling, parametric analyses are carried out to investigate the effect of main design variables (amount of coolant flow, coolant temperature and coolant ejection area) on the stage performance. The influences of coolant mass flow ratio and temperature on the mixing loss and specific work are investigated. The results are also rearranged to investigate the effect of blade temperature on the specific work. Analysis is also carried out by varying the ejection area, which may give useful criteria in determining the coolant condition and ejection hole size of real gas turbine engines.

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“…In GT performance, typical values for combustion chamber efficiency are about 0.98, 36 for pressure drop in the combustion chamber and HRSGs between 2% and 6% and for filters about 0.005–0.015 bar 37 . The required data for the models of GT Siemens SGT 800 and steam turbine Siemens SST 900 are summarized in Table 1.…”

Section: Energy Analysismentioning

confidence: 99%

Energy, exergy, and economic analysis of an integrated solar combined cycle power plant

Benabdellah

Ghenaiet

2021

Engineering Reports

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Integrated Solar Combined Cycle (ISCC) power plants based on Parabolic Trough Concentrators (PTCs) are the most efficient way for solar into electrical energy conversion. However, due to operation in several climate conditions, they need more efforts in their adaptation. This paper presents a techno‐economic assessment of an ISCC ‐ PTC system operating at Hassi R'mel site (Algerian Sahara) for which a new thermal storage system is incorporated. The obtained results reveal noticeable enhancements in the solar energy conversion and the overall power plant performance, hence offering better stability to the grid. As shown, the net solar thermal energy conversion ratio may reach up to 14%. Energy and exergy efficiencies are respectively equal to 56.06% and 53.29%, and about 46% of exergy received by the system is destructed. Moreover, the obtained Levelized Cost of Energy (LCOE) is around 9.75 ¢/kWh which is very promising, but still higher compared with a simple Combined Cycle (CC). At this geographical site, the modified ISCC ‐ PTC power plant will allow saving about 30 million $ in natural gas consumption and 13 million $ in emission taxes.

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Comparative Evaluation of the Effect of Turbine Configuration on the Performance of Heavy-Duty Gas Turbines

Cited by 19 publications

References 3 publications

Evaluation of Design Performance of the Semi-Closed Oxy-Fuel Combustion Combined Cycle

Evaluation of Design Performance of the Semi-Closed Oxy-Fuel Combustion Combined Cycle

Performance Analysis of a Turbine Stage Having Cooled Nozzle Blades With Trailing Edge Ejection

Energy, exergy, and economic analysis of an integrated solar combined cycle power plant

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