The Influence of Inlet Air Cooling and Afterburning on Gas Turbine Cogeneration Groups Performance

Barbu, Ene; Vilag, Valeriu; Popescu, Jeni A.; Gherman, Bogdan; AndreeaPetcu,; Petcu, Romulus; Silivestru, Valentin; Prisecaru, Tudor; MihaiellaCretu,; Olaru, Daniel

doi:10.5772/59002

Cited by 5 publications

(3 citation statements)

References 9 publications

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“…Preliminary experiments on natural gas, performed in COMOTI (Fig. 5) [16], showed a strongly turbulent flame. Thus in the numerical simulations the average temperature of the flue gases on the monitoring plane was compared with the reference temperature of 1043 K.…”

Section: Cfd Settingsmentioning

confidence: 98%

Numerical investigation on combustion and NO_x emissions of a CH₄ / kerosene afterburner

Mangra

Barbu

2021

E3S Web Conf.

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Cogeneration groups equipped with gas turbines usually operate with natural gas. The new requirements regarding the flexibility of functioning both with conventional and alternative fuels have led to the development of new solutions. An afterburning installation facilities, on the one hand, the combustion of fuels which can not normally be used in gas turbines, and on the other hand, allows a rapid adaptation of the cogeneration group to the user's variable thermal energy requirements. In some cases, an afterburning installation may contribute to the reduction of NOx emissions. It also increases the group's adaptability to changing environmental conditions, especially during the summer. Having in mind these tendencies and starting from the data collected from the 2xST 18 – Suplacu de Barcau cogeneration plant, this paper presents a numerical analysis of an afterburner in order to switch from natural gas to natural gas / kerosene functioning, with minimal modifications to the existing solution. A 3D steady RANS numerical integration of the Navier-Stokes equations has been carried out using the commercial software ANSYS CFX. For future research work, it will be taken into consideration the use of more complex reaction mechanisms and the variation of the spray angle will be considered. Also, in order to validate the CFD results a combustion experiments campaign will be conducted.

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Section: Cfd Settingsmentioning

confidence: 98%

Numerical investigation on combustion and NO_x emissions of a CH₄ / kerosene afterburner

Mangra

Barbu

2021

E3S Web Conf.

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“…The combined cycle power plants often use suction air cooling. Using water spray mist for the suction air cooling is simple method and it can obtain high efficiency of air cooling (Jaber, et al, 2007 andBarbu, et al, 2015). The residual water droplet in the suction air causes serious damage to the compressor blade.…”

Section: Introductionmentioning

confidence: 99%

Water spray spatial distribution by novel optical measurement for cooling suction air of gas turbine and its influence on cooling performance

Ishima

Takatsuki

Miyaoka

et al. 2020

Mechanical Engineering Journal

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Water spray spatial distribution by novel optical measurement for cooling suction air of gas turbine and its influence on cooling performance Abstract Air cooling performance and water spray characteristics are experimentally evaluated to obtain the basic knowledge for the suction air cooling of power plant. Novel optical measurement technique is proposed for measuring spatial number density of water droplet and water quantity in the air flow. The technique is based on Lambert-Beer law. An attenuation rate of the power of a laser beam passing through the mist flow is measured and the number of droplets is evaluated. Characteristics of the water spray are also evaluated by a phase Doppler anemometer (PDA). The data are compared with cooling performance. All experiments are tested in a wind tunnel with 1m x 1m square shape and 2 m in length. Mean velocity of main flow is set at 2 m/s, temperature at inlet of wind tunnel is set at 33 degree Celsius. Humidity of the inlet air is varied from 60 % to 90 %. The results show that the cooling efficiency by the water spray is depended on the water droplet diameter and humidity. The PDA data and the cooling efficiency are well correlated. The proposed method can present the data related with the droplet number and quantity.

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“…Because of the high operating temperatures of gas turbines and the need of an adequate cooling, combustion gases contain about 11-16% oxygen (by volume), which enables additional fuel combustion (post combustion) [1]. The post combustion burner can operate on natural gases as fuel, with exhaust gases from the gas turbine or fresh air.…”

Section: Introductionmentioning

confidence: 99%

Researches on NO<sub>x</sub> Emissions from the Test Bench Testing of a Post Combustion Burner

Cretu

Barbu

Teleaba

et al. 2016

AMM

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The more and more restrictive environment requirements in the field of pollutant emissions of co-generative plants are imposing researches related to the more efficient work of those related to the post combustion facility. The paper presents the results of a post combustion burner achieved on a test bench, when it idling operates on natural gas mixed with air or with burned gases of a gas turbine. The modeling of the measured emissions, led to NOx concentrations in ambient air that are below the limits imposed by the in force regulations related to air quality and are correlated to the real time measured data.

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The Influence of Inlet Air Cooling and Afterburning on Gas Turbine Cogeneration Groups Performance

Cited by 5 publications

References 9 publications

Numerical investigation on combustion and NO_x emissions of a CH₄ / kerosene afterburner

Numerical investigation on combustion and NO_x emissions of a CH₄ / kerosene afterburner

Water spray spatial distribution by novel optical measurement for cooling suction air of gas turbine and its influence on cooling performance

Researches on NO<sub>x</sub> Emissions from the Test Bench Testing of a Post Combustion Burner

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The Influence of Inlet Air Cooling and Afterburning on Gas Turbine Cogeneration Groups Performance

Cited by 5 publications

References 9 publications

Numerical investigation on combustion and NOx emissions of a CH4 / kerosene afterburner

Numerical investigation on combustion and NOx emissions of a CH4 / kerosene afterburner

Water spray spatial distribution by novel optical measurement for cooling suction air of gas turbine and its influence on cooling performance

Researches on NO<sub>x</sub> Emissions from the Test Bench Testing of a Post Combustion Burner

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Product

Resources

About

Numerical investigation on combustion and NO_x emissions of a CH₄ / kerosene afterburner

Numerical investigation on combustion and NO_x emissions of a CH₄ / kerosene afterburner