0
research-article

Analysis of water-fuel ratio variation in a gas turbine with a wet-compressor system by change in fuel composition.

[+] Author and Article Information
Yonatan Cadavid

Grupo de Ciencia y Tecnología del Gas y Uso Racional de la Energía, Facultad de Ingeniería, Universidad de Antioquia, Calle 67 N° 53 – 108, Bloque 19 – 000, Medellín, Colombia
yonatan.cadavid@udea.edu.co

Andres Amell

Grupo de Ciencia y Tecnología del Gas y Uso Racional de la Energía, Facultad de Ingeniería, Universidad de Antioquia, Calle 67 N° 53 – 108, Bloque 19 – 000, Medellín, Colombia
andres.amell@udea.edu.co

Juan Alzate

Innovación y Desarrollo. Celsia S.A. E.S.P, Carrera 43a No. 1a Sur − 143. Piso 5, Medellín, Colombia
jalzatev@celsia.com

Gerjan Bermejo

Operación. Celsia S.A. E.S.P, Carrera 43a No. 1a Sur − 143. Piso 5, Medellín, Colombia
gbermejo@celsia.com

Gustavo Alfonso Ebratt Herazo

Operación, ISAGEN, Carrera 48 No. 26 − 85 Piso 1, torre sur, Medellín, Colombia
gaebratt@yahoo.es

1Corresponding author.

ASME doi:10.1115/1.4038137 History: Received April 22, 2017; Revised August 09, 2017

Abstract

The wet compressor (WC) has become a reliable way to reduce gas emissions and increase gas turbine efficiency. However, fuel source diversification in the short and medium terms presents a challenge for gas turbine operators to know how the wet compressor will respond to changes in fuel composition. For this study, we assessed the operational data of two thermal power generators, with outputs of 610 MW and 300 MW, in Colombia. The purpose was to determine the maximum amount of water that can be added into a gas turbine with a WC system, as well as how the NOx/CO emissions vary due to changes in fuel composition. The combustion properties of different gaseous hydrocarbon mixtures at wet conditions did not vary significantly from each other - except for the laminar burning velocity. It was found that the fuel/air equivalence ratio in the turbine reduced with lower CH4 content in the fuel. Less water can be added to the turbine with leaner combustion; the water/fuel ratio was decreased over the range of 1.4 to 0.4 for the studied case. The limit is mainly due to a reduction in flame temperature and major risk of lean blowout (LBO) or dynamic instabilities. A hybrid reaction mechanism was created from GRI MECH 3.0 and NGIII to model hydrocarbons up to C5 with NOx formation. The model was validated with experimental results published previously in literature. Finally, the effect of atmospheric water in the premixed combustion was analyzed and explained.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In