| OCR Text |
Show require the replacement of the cylinder and piston heads, and a more efficient ignition system to permit the ignition of much leaner air-fuel ratio mixtures. Table 7. List of Projected retrofit DLNCs for small gas turbine prime movers Make/Model Allison K501 Rolls Royce Avon and RB211 Coberra 2000 and 6000 U T C (Pratt Whitney) FT8 Solar Centaur and Mars G E Frame 3, 5 and L M 1600 Projected N O x Emissions from DLNC (ppm@15% 02) 20 to 42 25 to 42 25 to 42 25 25 to 42 25 Estimated Availability 1995 to 1997 1994 to 1995 1994 to 1995 1995 to 1997 1994 to 1997 1994 to 1998 Percent of All Gas Turbines Prime Movers 7 14 4 1 14 17 Retrofit kits are available primarily from the original equipment manufacturers such as Cooper Bessemer and Dresser-Rand. Table 8 lists the modification kits currently available for specific engine models. It is important to note that because kits are not available for other engine types, the retrofit of these other engine types will not be possible without significant R & D by the O E M . Cooper Bessemer and Dresser-Rand provide L C kits for 35 percent of all uncontrolled lean combustion engines. Controlled N O x emission levels with these kits normally range between 1 and 3 g/hp-hr, corresponding to an average N O x reduction of 85 percent from uncontrolled levels. Clean-burn kits increase engine horsepower, while lower in-cylinder temperatures decrease efficiency, increase BSFC, and increase engine life. Estimates of retrofit cost effectiveness range Table 8. Clean-burn retrofit kits currently available Manufacturer Cooper-Bessemer Dresser-Rand Waukesha White Superior Applicable Retrofit Engine Models (Nominal N O x Emissions from Controlled Engine, g/hp-hr) G M V (2.0) and W-330 Series (2.0) K V R (2.5), K V S (2.0), T C V (2.2), and T L A (2.2) L5108GL, L15790GL, 7042GL GTL Percent of All Lean-Burn Engines 20 15 1 3 9 1-4 |
