M. Aigner et G. Muller, 2ND-GENERATION LOW-EMISSION COMBUSTORS FOR ABB GAS-TURBINES - FIELD-MEASUREMENTS WITH GT11N-EV, Journal of engineering for gas turbines and power, 115(3), 1993, pp. 533-536
In February 1991, a type GT11N gas turbine (Midland, USA) was retrofit
ted with ABB's new EV-Silo-Combustor. Tests were then carried out to e
xamine the operation concept, to demonstrate the technical reliability
, and to confirm the low emission performance of this new technology.
This paper will describe: the combustor design-one single silo combust
or mounted on the turbine and equipped with 37 Ev burners, and the res
ults of the extensive field measurements-the operation concept (lean p
remix combustion without any pilot diffusion flames, 7 burner groups)
is simple and reliable. The emission targets-NO(x) < 2.5 ppmv (15 perc
ent O2, natural gas), CO < 8 ppmv, UHC<5 ppmv-were reached. NO(x) valu
es are even lower than 15 ppmv at base load. The NO(x) predictions for
the GT11N-EV, based on the results of high-pressure tests in Cologne
(ASME Paper No. 90-GT-308), compared very well with the results of fie
ld measurements.