The Application of DLN Technology to the Tornado and Tempest Industrial Gas Turbines PUBLIC ACCESS

[+] Author Affiliations
Michael B. Boyns, Rajeshri Patel

European Gas Turbines Ltd., Lincoln, UK

Paper No. 97-GT-059, pp. V002T06A003; 8 pages
  • ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
  • Orlando, Florida, USA, June 2–5, 1997
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7869-9
  • Copyright © 1997 by ASME


Dry low NOX combustion technology has been successfully applied to the EGT Tornado and Tempest industrial gas turbines. This lean-premix technology has been based on that being employed in the EGT Typhoon gas turbine, as reported by Norster & De Pietro (1996) but with a number of modifications to suit the individual engines.

The Tornado is a 6.1 MWe machine designed in the late 1970’s for power generation and mechanical drive applications. The worldwide emissions legislation of recent years has provided the requirement to reduce NOX emissions in the exhaust, both for new machines and for those already in operation. Hence a system suitable for retrofitting as well as new production was required. The Tornado utilises similar burners to the Typhoon but with different combustion chambers and a different centre casing from the standard Tornado. Due to the differing cycle conditions, a different reaction zone stoichiometry has been used. A short rig test program followed by engine testing have achieved NOX emissions at base load significantly lower than the initial program target of 42 ppmv and led to the program target being revised to 25 ppmv.

The Tempest, launched into the market in 1995 produces 7.49 MWe in single shaft configuration and is aimed at the electrical power generation market. To comply with current emissions legislation, a DLN system has been developed. The Tempest is a 25% scale up of the Typhoon but its mechanical design incorporates a simplified main and pilot burner arrangement and a fully fabricated combustor. At base load, the Tempest operates at a higher turbine entry temperature than the Typhoon but has been designed such that the equivalence ratio in the reaction zone is slightly lower. A comprehensive test programme has demonstrated hardware which significantly improves upon the target emissions limit of 25 ppmv NOX.

Copyright © 1997 by ASME
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