The Indiana Office of Air Quality (OAQ) on May 27 approved an air permit for AEP Generating Co. for the gas-fired Lawrenceburg Plant covering five new black start diesel generators.
The five emergency black start diesel generators, identified as EG1 through EG5, each will have a maximum capacity of 3,717 horsepower, using no controls, and exhausting outdoors. Black start engine means an engine whose only purpose is to start up a combustion turbine.
The Lawrenceburg facility consists of four natural gas-fired combustion turbine generators, identified as units CT1, CT2, CT3, and CT4, which went into construction in 2001, each with a nominal heat input capacity of 1,906.4 MMBtu/hr (higher heating value), equipped with low NOx burners, controlled by four selective catalytic reduction (SCR) systems. The combined nominal power output is 1,130 MW. It also has four heat recovery steam generators, identified as units HRSG1, HRSG2, HRSG3, and HRSG4, which commenced construction in 2001, equipped with natural gas fired duct burners, each with a maximum heat input capacity of 310 MMBtu/hr (higher heating value), controlled by four SCR systems. The plant also had one natural gas-fired auxiliary boiler, which commenced construction in 2001, with a maximum heat input capacity of 114.6 MMBtu/hr, equipped with a low NOx burner.
This permit can be revoked if construction of the new generators doesn’t start within 18 months.