کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
243102 501919 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fuel flexible distributed combustion for efficient and clean gas turbine engines
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
Fuel flexible distributed combustion for efficient and clean gas turbine engines
چکیده انگلیسی


• Examined distributed combustion for gas turbines applications using HiTAC.
• Gaseous, liquid, conventional and bio-fuels are examined with ultra-low emissions.
• Novel design of fuel flexibility without any atomizer for liquid fuel sprays.
• Demonstrated fuel flexibility with emissions <4.5 PPM of NO for different fuels.
• Demonstrated CO emission <10 ppm for methane based fuels, <40 PPM for others.

The need for fuel flexible ultra-low emission gas turbine combustors is imminent to secure future power needs. Distributed combustion technology is demonstrated to provide significant performance improvement of gas turbine combustors including uniform thermal field in the entire combustion chamber (improved pattern factor) at very high combustion intensity, ultra-low emission of NOx and CO, low noise, enhanced stability, higher efficiency and alleviation of combustion instability. Distributed reaction conditions were achieved using swirl for desirable controlled mixing between the injected air, fuel and hot reactive gases from within the combustor prior to mixture ignition. In this paper, distributed combustion is further investigated using a variety of fuels. Gaseous (methane, diluted methane, hydrogen enriched methane and propane) and liquid fuels, including both traditional (kerosene) and alternate fuels (ethanol) that cover a wide range of calorific values are investigated with emphasis on pollutants emission and combustor performance with each fuel. For liquid fuels, no atomization or spray device was used. Performance evaluation with the different fuels was established to outline the flexibility of the combustor using a wide range of fuels of different composition, phase and calorific value with specific focus on ultra-low pollutants emission. Results obtained on pollutants emission and OH* chemiluminescence for the specific fuels at various equivalence ratios are presented. Near distributed combustion conditions with less than 8 PPM of NO emission were demonstrated under novel premixed conditions for the various fuels tested at heat (energy) release intensity (HRI) of 27 MW/m3-atm. and a rather high equivalence ratio of 0.6. Higher equivalence ratios lacked favorable distributed combustion conditions. For the same conditions, CO emission varied for each fuel; less than 10 ppm were demonstrated for methane based fuels, while heavier liquid fuels provided less than 40 ppm CO emissions. Lower emissions of NO (<4.5 PPM) were also demonstrated at lower equivalence ratios. This demonstration outlines the combustor ability for fuel flexibility without any modifications to the combustor injectors, while maintaining high performance. Further reduction of NOx can be possible by establishing true distributed combustion condition, in particular at higher equivalence ratios.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 109, September 2013, Pages 267–274
نویسندگان
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