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Oooohhhhh. ..... You had to go and ask, didn't you? Gas turbines and axial compressors are unique machines. A prime mover and generator directly coupled together spin at the same speed--a speed which is a function of the grid frequency. So, if the grid frequency is stable, the speed of the...

rajesh elongavan gt, I spoke with my friend today for a little while about this. It's not raising the humidity of the axial compressor inlet air that increases the torque/power output of the unit. It's the increase in density of the air that does it--increases the power output of the unit. And...

Sirtaurus12, The first two places you should begin your search for information is by referring to the Gas Fuel and Fuel Purge P&IDs for the unit(s) at your site, and then the Gas Fuel and/or Fuel Purge section of the Operations & Maintenance Manuals provided with the equipment by the...

NOWHERE does the original poster--or oliverm--mention what the equipment they are having the issue with is. A boiler? An HRSG (Heat Recovery Steam Generator) with auxiliary firing? A gas turbine? If a gas turbine, what manufacturer and what size/type? I can guess, but I don't like guessing...

1. Denser air IS NOT ALWAYS more humid. (Think of the Arctic or the Antarctic.) Not all power plants are located in hot, humid locations. Some not-so-hot locations can be humid in the summer or monsoon seasons, and not so humid other times of the year. Evaporation is an inexpensive way to make...

rajesh elongavan gt, One wonders what you’re thinking of doing/trying.... In my thought, gas turbine axial compressor inlet air density is higher when the air is colder. Since the compressor spins at a relatively constant speed more air is moved by the compressor when the density is higher...

huruhara, My best answer would be that while both modes imply the turbine-generator is not synchronized to an "infinite" grid with other generators and their prime movers, house load implies a very small load (approximately 10 MW or less). Many prime movers, and even some generators, are not...

GE Belfort strikes again! All the GE water injection systems I have worked on used a single output line from the skid (compartment) to a manifold around the axial compressor casing. High pressure flexible hoses were then used to supply the water to a check valve at each combustion can cover...

pauldh, Yes; flow dividers are used almost universally for liquid fuel systems on GE-design heavy duty gas turbines. They do not have to spin at a constant speed--in fact, they spin at whatever speed is the result of the flow through them. The purpose is to divide the flow EVENLY ()equally)...

pauldh, I have a good deal of experience with GE-design heavy duty gas turbine water injection systems and components--but I have never seen a driven flow divider used for water injection--and by driven I mean a flow divider that has a motor (probably AC) that is used to provide the...

There are proximity sensors, and there are proximity sensors. Vibration sensors and position sensors (oh--and vibration sensors can also be used for position detection--for very short movements.) Most rely on some kind of magnetic principle. You might try searching for non-contact position...

Curious_One, >>>CORRECTION<<< "...And, thanks for trying to bail me out, ..." Not nail me out. Spell-checkers. Stoopud spelcjecqurs.

Thanks, Curious_One. This type of question, or one asked in this way, is difficult for me to respond to. Mostly, the questioner is likely looking for confirmation of a theory or reason they have for something which seemed to have occurred somewhere. And we get very little actionable data...

By the way, A 1% speed difference (between reference and actual) for a 50 Hz machine with 4% Droop would correspond to a 0.5 Hz frequency change. Just in case enquiring minds wanted to know.

Djafer-QP, As ConrolsGuy25 said we would need to see the motor starter schematic for 88QA and 88HQ and 88BA to be sure. OR, perhaps whoever provided the package or the control system upgrade, modified the application code in the Mark VIe to stop some AC electric motors when an overload for that...

Djafer-QP, We don’t know how old your GE-design Frame 5 heavy duty gas turbine is, only that it has a Mark VIe turbine control system. We also don’t know if your unit was packaged and sold by GE or by one of its licensed packagers (BHEL; John Brown; Nuovo Pignone; etc.). In general, GE heavy...

Syed Ahmed, I'm not quite sure I completely understand the question, but if the frequency had increased or was increasing and the governor of a particular machine did not reduce it's fuel/load in response then the frequency would tend to stay high and not decrease--the machine would not be...

abdouzita103, Wow! It's been so long since I've thought about <I>s and Animated Display Item List Files, I've even forgotten how they are identified. I do recall they should have been in the F:\RUNTIME directory, but quite often were put/found in the F:\UNITn directory. AND, I believe one...

jacob.ramirez.2020, What does a degree mean? It means: "I set a goal for myself, a "long-term" goal (of usually more than 1 or 2 years). I did the things that were required to achieve that goal and I received a degree for successfully completing them. In the course of completing those...

Reduan Rishan, I see you posted this digital "thought" in the 'Human Machine Interface - HMI' forum. So, you must agree that we definitely need stronger HMI monitors--so that when we throw objects at the monitor they won't damage so easily. And the poor monitors--they really aren't to blame...