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Extended load range operation of GTs as a tool for controlingelectricity grid equipped with
renewable energy suppliers.
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Boris ChudnovskyIlya Chatskiy
Alex LazebnikovIEC
THE 18th ISRAELI SYMPOSIUM ON JET ENGINES AND GAS
TURBINES
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• Traditional methods of NOx reduction in combustion exists:• Modification of the firing system to Lean Premixed
Combustion (DLN – Dry Low NOx) • Injection of water into the firing system (WLN – Wet
Low NOx)• Post combustion flue gas treatment to remove NOx
(such as SCR systems – Selective Catalytic Reduction)
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Dynamics Reliability
Component Life
NOx
Stability & Premix
Mode Load Range
CO
Design Technology –A Four Sided Box
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Frame 6 GE GT
50 MW P&W FT4 GT
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Siemens GT and Burner General view
Upgraded firing
system
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9E DLN1 GT General view
DLN2.0+ DLN2.6+
9F DLN2 GT General view
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0
20
40
60
80
100
120
140
0 5 10 15 20 25 30 35 40
CO
, p
pm
@15%
O2
Load, Mw
CO emission as function load
Test, 10.05.2009,Tamb=28 C
Test, 12.12.2011,Tamb=13.6 C,
Atarot
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• Step 1 – Thermal balance and heat transfer calculations throughout the length axis of the combustor including (local values of burnout, O2, Flue Gas temperatures and main flue gas constituents).
• Step 2 – Chemical Kinetics modeling and initial operation and validation to fit measured data Firing LFO/NG.
• Step 3 – Optimizing to reach the best Emissions vs. performance and combustion stability effect.
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Based on the performed simulation it may
be concluded that:
FGR mixing with fuel may be a useful tool
for extended GT load range operation
while keeping minimum emissions.
However, in order to make more accurate
conclusion about the proposed
technology a laboratory and full scale test
are recommended.
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Thank you
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