Spread monitor
Spread monitor
(OP)
After how many days of GT operation can we start detecting Exhaust Temperature Spread
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: Spread monitor
Once the turbine is at load, the readings should stabilize after an hour or two (assuming no load swings).
RE: Spread monitor
during startup,acceleration and load selection the exhaust temperature spread monitor has a bias added to allow for transients.
if there is high spread at full speed (for instance if a can flames out) the unit will trip on high spread.
thermal stabilization of the unit has nothing to do with the spreads.
thermal stabilization of the unit is defined by the rate of change of the interstage temperatures (wheelspace thermocouples), usually: less than 2degF in 15min
high exhaust spread is related to combustion or exhaust thermocouple problems.
the unit could be in transient thermal state (wheelspace temperature changing) and still have a high spread condition and trip.
conversely... the unit could have high wheelspace temperatures (in alarm) due to damaged sealing and no spread.
saludos.
a.
RE: Spread monitor
RE: Spread monitor
rmw
RE: Spread monitor
If a can flames out at no-load, put some load on it to increase the compressor discharge pressure. This may be enough to allow the unit to cross-fire between cans and re-light the flame-out.
RE: Spread monitor
RE: Spread monitor
saludos.
a.