Where local air quality requirements are more
stringent, a Selective Catalytic Reduction (SCR), water injection, or other
NOx abatement system may be required to hold the gas turbine engine's
emission levels to acceptable levels. Water injection can also be used to
lower first cost for abatement, but water use (typically 0.4 of a pound per
pound of fuel) can be a significant cost since it must be dematerialized to
avoid the solids buildup in the hot end of the engine. Again, check with
local environmental agencies for specific guidance. |