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Extended Turndown, Fuel Flexible Gas Turbine Combustion System

[+] Author Affiliations
Peter Stuttaford, Hany Rizkalla, Yan Chen

Power Systems Mfg, LLC (PSM), An Alstom Group Company, Jupiter, FL

Brian Copley, Thomas Faucett

Shell Exploration & Production Company, Houston, TX

Paper No. GT2010-22585, pp. 483-492; 10 pages
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 2: Combustion, Fuels and Emissions, Parts A and B
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4397-0 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by ASME and Alstom


Flexibility is key to the future success of gas turbines for power generation. As renewable energy becomes more widely used the need for reliable, flexible standby power generation will increase. Gas turbines which are able to operate efficiently and in emissions compliance from extended low load to base load will have a significant advantage in meeting this need. Fuel costs and availability are of increasing concern. A gas turbine which is able to flexibly operate with a wide range of fuels, without the need for a diluent such as water or nitrogen, will provide added value to the operators of these machines. Carbon emissions are also of growing environmental concern, and the abatement of such emissions is likely to become of increasing monetary value. A fuel flexible combustor able to operate flexibly on both decarbonized fuel and natural gas will be well positioned to take commercial advantage of the situation. A combustion system is described and demonstrated which meets the goals set forth above. The system is simply retrofittable into existing E/F-class frame machines. The combustor is comprised of a dry lean premixed system without the need for diluents to control emissions. The operating principle of the new combustor is described. A full scale rig test program was undertaken to validate the new design and these results are presented. Results are shown with low emissions operation at 15–25% engine load. Combustor performance with a range of fuel blends up to 60% hydrogen, all with emissions below 9ppm of NOx and CO, is presented.

Copyright © 2010 by ASME and Alstom



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