Performance enhancement of the gas turbine combined cycle by simultaneous reheating, recuperation, and coolant inter-cooling

Kwon, Hyun Min; Moon, Seong Won; Kim, Tong Seop; Kang, Dong Won

doi:10.1016/j.energy.2020.118271

Cited by 23 publications

(6 citation statements)

References 24 publications

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“…Higher compressor cost and reduction of the GT maneuverability due to the higher risk of compressor stall. [18] Regeneration of the GT exhausts heat with a regenerator. 1.0-3.5 Necessity to install a regenerator with remarkable mass and dimensions.…”

Section: Improvement Methodsmentioning

confidence: 99%

“…1.0-3.5 Necessity to install a regenerator with remarkable mass and dimensions. [16,18] Transition from 1P HRSG to 1P + RH 2.25-3.1 Additional HRSG surface and steam pipelines [19,20] Transition from 1P HRSG to 2P 1.6-1.8 Additional equipment for the second steam circuit [19,20] Transition from 2P HRSG to 2P + RH 0.19-0.5 Additional equipment for the third steam circuit [19,20] Transition from 2P HRSG to 3P 0.3-0.5 Additional equipment for the third steam circuit [19][20][21] Transition from 3P HRSG to 3P + RH 0.6-1.09 Additional HRSG surface and steam pipelines [19][20][21] HRSG-heat recovery steam generator; 1P-single-pressure; 2P-dual-pressure; 3P-triple-pressure; RH-reheat.…”

Section: Improvement Methodsmentioning

confidence: 99%

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Research and Development of Trinary Power Cycles

et al. 2022

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The most effective and environmentally safe fossil fuel power production facilities are the combined cycle gas turbine (CCGT) ones. Electric efficiency of advanced facilities is up to 58% in Russia and up to 64% abroad. The further improvement of thermal efficiency by increase of the gas turbine inlet temperature (TIT) is limited by performance of heat resistance alloys that are used for the hot gas path components and the cooling system efficiency. An alternative method for the CCGT efficiency improvement is utilization of low potential heat of the heat recovery steam generator (HRSG) exhaust gas in an additional cycle operating on a low-boiling heat carrier. This paper describes a thermodynamic analysis of the transition from binary cycles to trinary ones by integration of the organic Rankine cycle (ORC). A mathematical model of a cooled gas turbine plant (GT) has been developed to carry out calculations of high-temperature energy complexes. Based on the results of mathematical modeling, recommendations were made for the choice of the structure and parameters of the steam turbine cycle, as well as the ORC, to ensure the achievement of the maximum thermal efficiency of trinary plants. It is shown that the transition from a single pressure CCGT to a trinary plant allows the electric power increase from 213.4 MW to 222.7 MW and the net efficiency increase of 2.14%. The trinary power facility has 0.45% higher efficiency than the dual pressure CCGT.

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Section: Improvement Methodsmentioning

confidence: 99%

Section: Improvement Methodsmentioning

confidence: 99%

Research and Development of Trinary Power Cycles

et al. 2022

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“…They concluded that both of the inlet air temperature has a great impact on the thermal performance of gas turbines. According to the study of By applying reheating, recuperation, and coolant inter-cooling on the gas turbine, Kwon et al [25] investigated the performance enhancement of a combined cycle power plant (CCPP). Majdi Yazdi et al [26] compared the effects of using absorption chiller, heat pump, and inlet fogging systems for cooling the inlet air of a gas turbine power plant for four cities in Iran under different climate conditions.…”

Section: Introductionmentioning

confidence: 99%

Performance degradation analysis of combined cycle power plant under high ambient temperature

Wan

Chen

2022

THERM SCI

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The mechanism of performance degradation of a natural gas combined cycle (NGCC) power plant under high ambient temperature is studied by analysing the performance characteristics and thermal properties of the working fluids. Real operating data under typical seasonal conditions are collected and studied. The results reveal that the power output of the NGCC system decreases by 22.6 %, and the energy efficiency decreases from 57.28 % to 56.3 % when the ambient temperature increases from 5-35?C. GT total power output and ST power output decrease by 17.0 % and 16.2 %, respectively, as ambient temperature increases from 5-35 0C. The enthalpy difference of the flue gas between the turbine inlet and outlet change slightly with varying ambient temperature. The fuel and air input decrease by 16.0 % and 16.2 %, respectively, as ambient temperature increases from 5-35?C. By analysing the calculated results, the decrement in air and fuel input d is considered as the immediate cause of system power output reduction. The proportion of power consumed by AC reaches 50.4 % at 35?C. This is considered to be caused by air compressor idle.

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“…The level of the hot gas temperature is now beyond the maximum material temperature of the gas turbine components [4]. For this reason, many technologies have been developed and applied, such as advanced superalloys; advanced thermal barrier coating (TBC); cooling systems, such as cooling air for hot gas path components; and advanced combustion systems [5][6][7][8][9]. TBC application in gas turbine is well-known and has been widely tested and discussed by researchers.…”

Section: Introductionmentioning

confidence: 99%

Test-Rig Simulation on Hybrid Thermal Barrier Coating Assisted with Cooling Air System for Advanced Gas Turbine under Prolonged Exposures—A Review

et al. 2021

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Thermal barrier coating (TBC) and cooling air systems are among the technologies that have been introduced and applied in pursuing the extensive development of advanced gas turbine. TBC is used to protect the gas turbine components from the higher operating temperature of advanced gas turbine, whereas cooling air systems are applied to assist TBC in lowering the temperature exposure of protected surfaces. Generally, a gas turbine operates in three main operational modes, which are base load, peak load, and part peak load. TBC performance under these three operational modes has become essential to be studied, as it will provide the gas turbine owners not only with the behaviors and damage mechanism of TBC but also a TBC life prediction in a particular operating condition. For TBC under base load or so called steady-state condition, a number of studies have been reviewed and discussed. However, it has been found that most of the studies have been conducted without the assistance of a cooling air system, which does not simulate the TBC in advanced gas turbine completely. From this review, the studies on TBC-assisted cooling air system to simulate the advanced gas turbine operating conditions have also been summarized, which are limited to test rig simulations under thermal cyclic mode where thermal cyclic represents peak and part peak load conditions. The equipment used to simulate the gas turbine operating condition, test temperatures, and durations are parameters that have been taken into consideration under this review. Finally, a test rig that is capable of simulating both TBC and cooling air effects at a high operating temperature of advanced gas turbines for prolonged exposure under steady-state condition has been proposed to be developed.

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Performance enhancement of the gas turbine combined cycle by simultaneous reheating, recuperation, and coolant inter-cooling

Cited by 23 publications

References 24 publications

Research and Development of Trinary Power Cycles

Research and Development of Trinary Power Cycles

Performance degradation analysis of combined cycle power plant under high ambient temperature

Test-Rig Simulation on Hybrid Thermal Barrier Coating Assisted with Cooling Air System for Advanced Gas Turbine under Prolonged Exposures—A Review

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