Performance analysis of a gas turbine combined cycle power plant with waste heat recovery in Organic Rankine Cycle

Bălănescu, Dan-Teodor; Homutescu, V. M.

doi:10.1016/j.promfg.2019.02.248

Cited by 32 publications

(23 citation statements)

References 13 publications

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“…Utilization of low-potential energy of gas turbine exhaust gases was considered by Bălănescu and Homutescua [28]. When using the gas turbine Orenda OGT1500, the gas temperature at the HRSG exhaust is 188 • C, which makes the use of ORC justified.…”

Section: Improvement Methodsmentioning

confidence: 99%

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%

Research and Development of Trinary Power Cycles

et al. 2022

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“…And the steam enters into steam turbine to produce extra work The efficiency of the CCPP system is much higher than that of gas turbine cycle or the Rankine cycle [2]. Hence the CCPP systems have been developed rapidly [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Energy and exergy analyses of a combined cycle power plant with inlet fuel heating

Chen

Wan

et al. 2022

THERM SCI

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By using exhaust gas as heating source, a combined cycle power plant with inlet fuel heating is investigated experimentally. Energy analysis and exergy analysis are carried out under different power load and ambient temperature. The results reveal that the thermal efficiency of the power plant system increases as power load increases. The thermal efficiency and power output at 5?C are 54.15% and 412 MW, respectively; while when the ambient temperature is 35?C, the thermal efficiency and power output are 52.3% and 330 MW, respectively. Under the same conditions, the combustion chamber has the highest irreversibility rate, while the air compressor has the lowest. The irreversibility rate of the power plant system increases in line with power load. The second-law efficiency increases from 37.08% to 50.12% when the power load changes from 30% to 100%.

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“…Meanwhile, several conditions at the site (July 2019) showed that the 2.2.1 (2 GT, 2 HRSG, 1 ST) configuration has been used in the CC net load of around 30 -45 %, resulted up to 21.34 % reduction in the efficiency of the generating unit. The lower efficiency is certainly detrimental because more fuel is needed for the same generated power [4] [5].…”

Section: Introductionmentioning

confidence: 99%

Load optimization on the performance of combined cycle power plant Block 4 PT Indonesia Power Priok POMU

Utami¹,

Yuliyani²,

Suprianti³

et al. 2022

J. Mechatron. Electr. Power Veh. Technol.

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Combined cycle power plant (CCPP) is a closed-cycle power plant, where the heat from the gas turbine’s (GT) exhaust gas will be streamed to the heat recovery steam generator (HRSG) to be utilized by steam turbine (ST). CCPP Block 4 (Jawa-2) PT Indonesia Power Priok POMU has an installed capacity of 880 MW, consists of 2 GT units (301.5 MW each) and 1 ST unit (307.5 MW). The performance of a power plant depends on its load, as the efficiency of the turbine generator is low when operated at low loads. The data as of July 2019 showed that 2.2.1 (2 GT, 2 HRSG, 1 ST) configuration has been used in three conditions where the CC net load was around 30 - 45 %, which in fact could be compensated by the 1.1.1 (1 GT, 1 HRSG, 1 ST) configuration. This resulted in a decrease of the CC net efficiency up to 21.34 %. The optimization that can be done is to change the load configuration from 2.2.1 to 1.1.1 at 0 - 50 % of CC net load through simulations, by including the influence of the GT and HRSG start-up processes. The result of this optimization is that the CCPP performance increases due to higher performance of each turbine generator. Thus, the optimization results during July 2019 provided energy saving of 1,146.09 MMBTU or equivalent to cost saving of IDR 152,249,551.76.

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Performance analysis of a gas turbine combined cycle power plant with waste heat recovery in Organic Rankine Cycle

Cited by 32 publications

References 13 publications

Research and Development of Trinary Power Cycles

Research and Development of Trinary Power Cycles

Energy and exergy analyses of a combined cycle power plant with inlet fuel heating

Load optimization on the performance of combined cycle power plant Block 4 PT Indonesia Power Priok POMU

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