2 CT'S AT IDENTICAL LOADS BUT ONE HAS HIGHER CO2
2 CT'S AT IDENTICAL LOADS BUT ONE HAS HIGHER CO2
(OP)
PONDERING AS TO WHY I, HAVE TO UNITS THAT ARE AT IDENTICAL LOADS MW WISE, BUT THE OTHER HAS HIGHER CO2 AT MINIUM LOADS AT ABOUT 60% OR 107 MW. THE CO2 IS ABOUT 5 TIMES AS HIGH AS THE OTHER. ALL GAS VALVES ON THESE TWO MACHINES (DLN) ARE PRETTY IDENTICAL, IGV'S THE SAME! CAN ANY ONE SUGGEST SOMETHING? CAN THESE BE A BAD SWIRLER ISSUE AT LOW LOADS WHEN PILOT FLAME BEGINS MAKE AN ENTRENCE BACK INTO THE SCEM OF THINGS? SOMEWHERE FUEL IS NOT BEING BURNED!
FLORIDA,
BIGDOG50





RE: 2 CT'S AT IDENTICAL LOADS BUT ONE HAS HIGHER CO2
rmw
RE: 2 CT'S AT IDENTICAL LOADS BUT ONE HAS HIGHER CO2
Many years ago, I had experience with a GT that eventually suffered massive damage (melt-down) due to a lost gas nozzle, but the unit operated "normally" until the nozzle completely fell off. Even after the nozzle fell off, performance deteriorated gradually over a period of hours. Back then, no one measured CO2. The exhaust temperature measurement locations were not sufficiently dispersed to detect the failure in the early stages.
RE: 2 CT'S AT IDENTICAL LOADS BUT ONE HAS HIGHER CO2
Picking up on rmw's question, are all other emissions measurements comparable? CO, SOx, etc?
How does EGT map versus fuel flow and IGV position? Do the units have different characteristics?
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I'm getting a great education!
RE: 2 CT'S AT IDENTICAL LOADS BUT ONE HAS HIGHER CO2
save you some steps. It could be your CO2 monitor is not functioning properly and that you have a bad sensor
Good Luck!!
Quote: "Its not what you know, its who you know" - anybody trying to find a decent job
RE: 2 CT'S AT IDENTICAL LOADS BUT ONE HAS HIGHER CO2
All of the above replies seem logical and important to verify however you make no mention of the type of units in question. The reasons for high CO readings, aside from the obvious issues listed in the above replies, can vary greatly with each specific OEM, engine type, and combustion system used.
High CO is a result of many potential causes including incomplete combustion, too much air and not enough fuel, too much fuel and not enough air, too much cooling air flow, missing seals etc.
If after verification of you instrumentation and callibrations prove correct there are some warning signs you can look for depending on the monitoring equipment installed and the type of engine in question.
I am assuming by the language used here (ie swirler, blade path spread, pilot flame etc) that some of these replies are originating from Siemens Westinghouse experience.
Regards
Romefu12
RE: 2 CT'S AT IDENTICAL LOADS BUT ONE HAS HIGHER CO2