Power Augmentation and Retrofits of Heavy Duty Industrial Turbines model 7EA

摘要

This Paper incorporates design modifications of Gas Turbine (GT) model 7EA vital elements such as the blades, vanes and shroud blocks that form with the tip of the blades desired running radial clearances. In addition, the Paper addresses the issues associated with inevitable GT parasitic losses such as 1stStage blades tip clearances hot gas bypassing and various labyrinth losses at compressor discharge and at bearing No 2 journals. The GT power augmentation by injecting artificially generated Fog into the compressor suction is described too. The GT power preservation was obtained by introduction of Interstage Injection (II) of clean water between the stator blades in first several stages of compression.