ABSTRACT
Accessories include the starting system, ignition system, lubrication system, air inlet cooling system, water or steam injection system (for NOx control or power augmentation), and the ammonia injection system. The starting, ignition, and lubrication systems are covered in this chapter. Starting systems fall into two categories: those that drive the gas generator directly and those that drive the gas generator through an intermediate gearbox. Ignition is one part of the gas turbine system that is often taken for granted. Even when a problem does develop the ignition system is not the first item checked. One reason is that this system has developed into one of the most reliable systems in a gas turbine package. The other reason is that ignition is only required during start-up. Lubrication systems in gas turbines must address two requirements: one is to provide lubrication between the rotating and stationary bearing surfaces, and the other is to remove heat (cooling effect) from those surfaces.
