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Seeker1988, So, the internals were replaced during an on-going HGPI (which is happening now), which probably means you don't know if the Mist Eliminator is working properly or not yet. Is that correct? Has the Mist Eliminator ever worked correctly? Because if it did for a long time, and...

Seeker1988, Interesting the differences in the exhaust duct back pressure, and the differences in IGV angles, and the difference in CPD values. I would expect with a higher IGV angle (more air flow) the CPD would be higher and the exhaust duct back pressure would be slightly higher--not lower...

Seeker1988, A loop seal is a means of isolating one body of liquid (possibly with a higher pressure) from another, possibly with a lower pressure. An example of a loop seal is in the bottom of a toilet. There is a "loop" (an S-shaped passage (the S is laying on it's side)), and that loop is...

Fourtotwentyma, Here is a recent thread which describes how to find all the devices which actuate the 86G lock-out relay: http://control.com/thread/1471414361 Unfortunately, the original poster did not write back to let us know what was preventing the lock-out from being reset...

Actually, I've been asked to clarify this statement: >The Mark V can use any position feedback device that is >excited with AC and puts out a differential voltage that is, >for some range (electrical and mechanical) linear with >position. RVDTs and LVDTs both work. The Mark V can only...

mirak, Flow through cross-fire tubes is caused by a pressure differential between adjacent combustors. Pressure differentials are usually caused by plugged fuel nozzles (restricting fuel flow), or bad liquid fuel check valves (it would have helped had you told us in the original post this...

Most P&IDs of machines which burn naphtha that I have reviewed have three-way valves to switch between naphtha and liquid fuel upstream of the high-pressure liquid fuel pump. The three-way valve is usually motor-operated, and takes several seconds (10-30) to move from one fuel to the other. This...

Mirak, Did the unit experience high exhaust temperature spreads during the time after the HGPI was completed and when the cross-fire tubes were found to be damaged? Because, usually burnt cross-fire tubes are a result of high exhaust temperature spreads. High exhaust temperature spreads...

The Mark V can use any position feedback device that is excited with AC and puts out a differential voltage that is, for some range (electrical and mechanical) linear with position. RVDTs and LVDTs both work. The RVDTs that were used on many MOOG-produced valves have typically had a slightly...

bil07, Every GE-design Frame 9E heavy duty gas turbine is NOT like every other GE-design Frame 9E heavy duty gas turbine. There are many subtle differences which can affect swirl angle, AND, of course, the major difference: the type of combustion system (conventional (diffusion) or DLN Dry...

> ....That calls for an in depth study of the plant operation, power > plant experience and installation & commissioning support of PMS > system supplier, in close coordination with plant people. This is one of the most important things that people fail to do when installing new controls or...

chillwin, I want to add one more thing--most centrifugal gas compressors can't draw a "suction" (vacuum) on their intake (suction). (Isn't the English language wonderful?) And they have to have some pressure, which ensures the flow of gas into the compressor to make rated flow. Without...

Bayramoglu, Thanks for the information. I don't see why you can't copy from one EEPROM to another; it should work. Have you tried putting the SDCC in the other panel, and then booting it up to see what happens? If it goes to I/O State A7, then it's working--but you should still download...

chillwin, Roy Matson's excellent response very accurately describes what determines suction pressure--it's determined by the pressure at the intake of the pump or compressor (the suction). In the case of the tank, the total distance from the pump inlet of the top of the liquid in the tank...

viralmehta, What Process and/or Diagnostic Alarms are annunciated when you try to initiate Cooldown? GE-design Frame 9E heavy duty gas turbines employ several different cooldown methods--one of them is called "slowroll" which uses the torque converter to <i>maintain</i> approximately 30-50...

Pedro, When did this problem start? Is this a new problem on an older generator-set, or a problem with a new generator-set? Did the problem start after some work on the prime mover, or on the electrical system (power/metering wiring)? Your post is not clear. When you say the generator...

Shanks, It's not the number of questions, it's the vagueness of the scenarios. 1. Every electronic or electro-mechanical or electro-hydraulic or mechanical-hydraulic governor I've ever worked on had both types of speed control modes by default. I'm sure there are some (probably for small...

suryapower, Did both units get the HGPI and R4 upgrade at the same time?

Bayramoglu, Happy to hear you were successful! You didn't say that you re-booted after each download. The information can't get from EEPROM to RAM until the processor is re-booted. As for why the downloads were "successful" (I presume that means there were no warnings or errors during...

Shanks, Not normally--BUT, there are sites that operate with special controls that use Isochronous control which is "over-ridden" by another controller. It's a very strange set of circumstances described by the OP (Original Poster), and one of the reasons people haven't likely responded is...