Gas turbine main filter replacement activity was carried out in foggy conditions, and after that off line water wash not carried out. After one day, compressor efficiency was reduced. Later it was identified that GT generating 4Mw less as compare to before filter replacement activity.
Thereby, GT was again shutdown for off line water wash activity. And after startup, nothing changed. Compressor was generating less MW. And then, we checked bleed off valves through Temperature gun and found 3 out of 4 bleed valves are passing.
Why this happened? It looks strange. Is it due to dust or some other factors? Need support.
Thereby, GT was again shutdown for off line water wash activity. And after startup, nothing changed. Compressor was generating less MW. And then, we checked bleed off valves through Temperature gun and found 3 out of 4 bleed valves are passing.
Why this happened? It looks strange. Is it due to dust or some other factors? Need support.