B
Dear All;
I know there are a lot of SRV/GCV topics on Control.com. And thanks to the wonderful "Search box" on the right top of each webpage of Control.com.
Another GOOD thing with Control.com, there is NO bills to sign before leaving *** Just a joke and my way to say thank you control.com****
I think each case is a special case and needs to be covered and discussed separately because each time the same topic is re-discussed a new flux of information arrive to complete the original topic.
My concern is about the GCV (Gas Control Valve) instability on GE HDGT Frame 5 double shaft driving centrifugal compressors.
Actually the GCV position is fluctuating between 68 and 73% in few seconds, The P2 (inter-valve pressure) seems steady with just a small fluctuation and same thing with the SRV position. The others parameters looks stable (TNH, TNL, FSR)
At 92% THL the GT goes to exhaust temperature control. Usually at this period of year (cold weather) the GT reaches easily the 98%TNL.
On this machine, one of the 2 LVDTs is gone (dead) not working at all and the second one has been for long time not inspected. So probably the GCV instability is due to the LVDTs.
My questions: Are GCV fluctuations the reason that the GT Control goes under exhaust temperature earlier than usual?? How match the GCV fluctuation tolerance should be?
Regards
karim
I know there are a lot of SRV/GCV topics on Control.com. And thanks to the wonderful "Search box" on the right top of each webpage of Control.com.
Another GOOD thing with Control.com, there is NO bills to sign before leaving *** Just a joke and my way to say thank you control.com****
I think each case is a special case and needs to be covered and discussed separately because each time the same topic is re-discussed a new flux of information arrive to complete the original topic.
My concern is about the GCV (Gas Control Valve) instability on GE HDGT Frame 5 double shaft driving centrifugal compressors.
Actually the GCV position is fluctuating between 68 and 73% in few seconds, The P2 (inter-valve pressure) seems steady with just a small fluctuation and same thing with the SRV position. The others parameters looks stable (TNH, TNL, FSR)
At 92% THL the GT goes to exhaust temperature control. Usually at this period of year (cold weather) the GT reaches easily the 98%TNL.
On this machine, one of the 2 LVDTs is gone (dead) not working at all and the second one has been for long time not inspected. So probably the GCV instability is due to the LVDTs.
My questions: Are GCV fluctuations the reason that the GT Control goes under exhaust temperature earlier than usual?? How match the GCV fluctuation tolerance should be?
Regards
karim