Protection for General Purpose Steam Turbines
Protection for General Purpose Steam Turbines
(OP)
For the protection of general purpose turbines which do not have vibration monitoring, we proposed on our ongoing project to provide an interlock between inlet temperature transmitter (TIC) and the turbine. The interlock shall send an alarm signal to the DCS at low temperature of steam supply and consequently shuts down each of the turbines at low temperature of the steam supply. Hoping to hear from you guys and thank you very much for your comments..





RE: Protection for General Purpose Steam Turbines
Only put off until tomorrow what you are willing to die having left undone. - Pablo Picasso
RE: Protection for General Purpose Steam Turbines
Low steam temperature causes moisture formation in the turbine in stages earlier than the stages designed to handle moist steam and that can cause damage that could ultimately lead to vibration problems, but that would be my last worry regarding low steam temperature.
Your question is hard to figure out.
rmw
RE: Protection for General Purpose Steam Turbines
RE: Protection for General Purpose Steam Turbines
For our other turbines without a history of steam temperature related problems, I don't see a significant value in steam temperature alarms or trips.
For smaller turbines, continuous vibration monitoring is probably not cost justified. Monitoring case vibration has less value since most of these turbines will have hydro-dynamic bearings. And monitoring vibration with proximity probes tends to be very expensive. I would concentrate on a good PM program and operator surveillance. For smaller, single stage, general purpose turbines, oil condition is the key to good reliability. Problems such as water accumulation are best controlled with skilled and trained operators.
Johnny Pellin
RE: Protection for General Purpose Steam Turbines
Thanks with this enlightenment and will help me a lot and my team to decide with our ongoing project "Ethylene Cracker Project" that will involve this general purpose turbines. Since the steam characteristic both on the inlet and even on the exhaust is far from saturated point, possibility of steam being saturated is impossible and alarm for steam temperature and even the shutdown will not be installed. Thank you all guys....