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Ahh, Sonatrach, Algeria. That names strikes ... trepidation into the hearts of many people, even people who weren't "fortunate" enough to be associated with the project. Look, <b>EVERY</b> <I> has an executable directory, G:\EXEC. And, almost every executable in that directory has a little...

Have you looked at the Instruction Manuals and the P&IDs provided with the two units? And have you consulted the parts list and drawings to see what the two manufacturers originally provided with the two units? Because, I would have to believe that someone would be seriously endangering a...

I believe the originator was referring to Circle-Bar-W (Westinghouse) 501 heavy-duty gas turbines. Perhaps JCP could clarify that for us all.

Performance is a function of a lot of things, not just filter dp and compressor cleanliness. How long since the last maintenance inspection? How long has it been since the CPD transmitter was calibrated? If the unit has more than one CPD transmitter (96CD-n), are they both indicating...

For GE-design heavy duty gas turbines, spinning re<b>serve</b> is usually an adjustable value. It's usually set to a value that results in stable operation. If the value is too low, then the fuel flow might not be very stable (especially on some gas fuels). But, it can be set higher, or even...

The "fast start" button was never "commissioned". What does that mean? Does it mean it's never been used? Or it was not tried during start-up/commissioning (which is an oversight on someone's part)? Usually, most units have a FAST <b>LOAD</b> START button, which results in a faster loading...

Did machines start at the identical differential pressure after the filters were replaced? Were both machine's compressors clean after the outages? Are both machines producing virtually the same compressor pressure ratios? How is efficiency being defined by GE? How are you defining...

Well, have you been out to the Accessory Compartment to look at the Diesel Engine starting motor, the torque converter that it's directly connected to, and the jaw clutch between output of the torque converter and input to the Accessory Gear/turbine shaft? You say you "see" there are two...

The first question that should be always be asked (in lower-case letters, thank you very much!) is: When did this problem start? If you're consuming large amounts of hydrogen and have high scavenging rates, it could be the seals and/or seal springs are failing or are excessively worn. I've...

You're going to have to be more specific. There are a lot of different types of sensors used with Mark VIe-based systems, and we haven't any idea which one(s) you're referring to or how you think they might be calibrated using the Mark VIe. The Mark VIe is not as sophisticated as some DCSs...

You didn't answer the first question: When did this problem start? Has it been persisting since commissioning? Has it just recently started after some maintenance outage? Were the GCV LVDTs recently "re-calibrated"? Load rejection from Base Load (100+ MW) is hard on a machine; really hard...

People have tried it before with very mixed results. It depends on several factors, first, the patience of the people purging and charging the generator (which is usually not very good, and neither is that of management waiting for the purge and charge to be completed). Second, the...

When did this problem start? What kind of turbine control system does the turbine have? Load rejections are always kind of touch-and-go, and require tuning, which can be (and has been) undone by a less-than-accurate GCV LVDT calibration. And, if you have high spreads (and it would be...

Failing hydrogen seals; improperly installed hydrogen seals; failing or broken hydrogen seal springs; excessive Seal Oil pressure are the usual culprits. Dirt/debris has also been known to get into the seals and cause problems, usually the brass rings get scored and sometimes the shaft, also...

If you want to get to the bottom of what's causing the failure and the Diagnostic Alarms, YOU NEED TO TROUBLESHOOT AND RESOLVE THE DIAGNOSTIC ALARMS. Post the Diagnostic Alarms and maybe someone can help, but don't just tell us you reset the card and there's still some Diag. Alarms and ask us...

If you want to understand GE-design heavy-duty gas turbines, understanding the Piping Schematics (P&IDs) is more than 75% of the battle. Full stop. I hear this all the time, that they are difficult to understand. I think that's because most people don't consult them unless there's a problem...

Dottey, Thanks for telling us what you've done to try to resolve the problem. You didn't tell us when this problem started, like after a maintenance outage, when the fuel valve LVDTs might have been "re-calibrated", or some other event. But, <b>You have to be joking, right?</b>...

There is a GE publication (no; I don't have a copy to send to anyone), GEI-100516, GSM for HMI Applications, that has sample C programs for use in communicating with a GSM server running on the GE HMI. That's about the extent of my knowledge; I'm not a programmer, but I think all of that is...

Hi, Have you looked at the Starting Means Piping Schematic (P&ID) to see that the diesel engine is not directly connected to the turbine shaft via the Starting Clutch? There is a hydraulic torque converter between the output of the diesel engine and the Starting Clutch/turbine shaft. (Actually...

This is a pretty good example of, "If there's a problem--calibrate the LVDT feedback! That will fix everything!" And, I'll wager large sums of any currency you like that nobody bothered to measure the actual IGV angle when performing the LVDT calibrations. Look, if you have instability then...