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Effects of Inlet Fogging and Wet Compression on Gas Turbine Performance

[+] Author Affiliations
Sepehr Sanaye, Hossein Rezazadeh, Mehrdad Aghazeynali

Iran University of Science and Technology, Tehran, Iran

Mehrdad Samadi, Daryoush Mehranian, Mohammad Kazem Ahangaran

Tehran Regional Electric Company, Tehran, Iran

Paper No. GT2006-90719, pp. 769-776; 8 pages
doi:10.1115/GT2006-90719
From:
  • ASME Turbo Expo 2006: Power for Land, Sea, and Air
  • Volume 4: Cycle Innovations; Electric Power; Industrial and Cogeneration; Manufacturing Materials and Metallurgy
  • Barcelona, Spain, May 8–11, 2006
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4239-8
  • Copyright © 2006 by ASME

abstract

Inlet fogging has been noticed widely in recent years as a method of gas turbine air inlet cooling for increasing the power output of gas turbines and combined cycle power plants. To study the effects of inlet fogging on gas turbine performance, in the first step, the evaporation of water droplets in the compressor inlet duct was modeled, and at the end of the inlet duct, the diameter of water droplets were estimated. The results of this process were compared with the results of FLUENT software. In the second step, the droplets which were not evaporated in compressor inlet duct were studied during wet compression in the compressor and the reduction in compressor discharge air temperature was predicted. Finally, the effects of both evaporative cooling in inlet duct, and wet compression in compressor, on the power output, and turbine exhaust temperature of a gas turbine with turbine blade cooling were investigated. These results for various amounts of air bleeding, without and with inlet fogging in the range of (0–2%) overspray are reported.

Copyright © 2006 by ASME

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