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These are my final words on this thread: GER-3620. If you don't have a copy, get one--from GE; from the World Wide Web; from anywhere you can. (No; I can't supply one via email to anyone.) It's a difficult read, and it talks about several different turbine/combustor configurations, but find...

Chris I haven't experienced "multiple" VPRO failures, but have experienced a couple of them and have been able to replace the affected VPRO without shutting the (gas) turbine down, or tripping it. I have noticed a marked difference in some of the configuration settings of various Mark VI...

Abdur Rehman, Thanks for the feedback. As a bit of added information, every GE-design heavy duty gas turbine I have EVER worked on had either positive or negative pressures in the compartments when the ventilation fans and dampers and louvers were working properly. If a fan is...

> I corrected: > 100 MW at lean lean mode for 4 months and extended lean lean for twenty days. The answer is the same: It should NOT have been operated in either mode for so long a period. DLN-I Primary and Lean-Lean combustion modes are intended to be "transition" modes, to get to low...

david, There should be some "low-point drains" in the piping systems. They are usually just small pipe "nipples" (1/4-inch, Schedule 80 pipe) with pipe plugs on one end mounted vertically each with a very tiny hole (orifice) drilled in them. They are intended be "draining" all the time, which...

Rudy, "AVR" means Automatic Voltage Regulator, but it is very commonly used to refer to the entire generator rotor excitation control system, which usually includes two "regulators" (PID loops) or "modes": Manual, or sometimes called "DC", and Automatic, or sometimes called "AC". The...

david, The maintenance "interval" you described seems a little long. Were the units equipped with the "long-life" combustion hardware (sorry; I can't recall the GE product name)? As for the Transfer Nozzle hardware damage, it certainly sounds like there was a problem between two or more...

Hello again, Dave, (I cant help but think of '2001: A Space Odyssey' every time I write that, feeling like HAL. Though for some reason, my train of thought while writing this was not very logical; sorry.) AC synchronous generator terminal voltage is a function of one of two things: speed...

Abdur Rehman, > We are planning to have thermocouples installed near already installed fire > detectors, and only alarm is to be configured on these thermocouples. > please suggest if it is going to work for online monitoring of temperature? The Mark V can accept most all types of T/Cs...

ali, I've actually been hoping some other contributor(s) would respond to this post.... This sounds like a textbook case of how <b>NOT</b> to operate a piece of equipment. Operators not paying attention to alarms (<b>especially</b> a fire alarm!!!) is not something anyone wants to read...

Ali, I've worked on my share of steam turbines over many years, and I've never encountered a heat exchanger like the one you have "described"--but I freely admit I haven't seen every configuration that exists. My guess is you are describing the gland seal steam condenser, and if so, they...

Hello, If you have a source of dry compressed air, these are very good coolers: http://www.vortec.com/p-169-hazloc-vortex-ac.aspx There is a heat load sizing calculator available on the site. You could also check with Hoffman Enclosures about their recommendations, accessories and...

sensij, I think we're not clear about the question or the problem. One should always use twisted, shielded pairs for each analog signal, even if the COM/RET of all individual power supplies are all referenced to the same earth/ground. If the two devices are not located in the same...

Ebrahim, >As I mentioned, I need a solution for choked flow in control valve for GAS flow. The >document you referred to, is about liquid flow. You mentioned this is a <b>DIFFERENT</b> thread: http://www.control.com/thread/1375111314 Your post in <b>this</b> thread (in response to a...

Ali, It's important to note that each of the figures in this post are CROSS-SECTIONAL SIDE VIEWS of the components listed. It's very difficult to draw figures for posting to control.com, so you're going to have to visualize lines that can't be drawn using ASCII text characters for openings in...

DRP, You would need to know if the diverter damper actuator and hinge mechanism are capable of withstanding the pressures which would be applied when the damper is partially open. The pressures can be VERY great. Some diverters are not designed to be operated with the dampers in a mid-stroke...

Ali, If the turbine was provided by GE or one of its licensed packagers there should be a manual provided with the unit which has several distinct sections. One of them includes written system descriptions for each one of the systems, and it seems from your post the turbine in question has...

DFoster, >>ERROR CORRECTION<< The following statement is <b>incorrect</b>: Also, as fuel is increased it's also necessary to increase the air flow to prevent leaning-out the air fuel mixture too much and tripping the turbine on loss of flame. It should have read: Also, as fuel is...

DFoster, You are most welcome for any help I may have provided. I hope you have been using the 'Search' feature of control.com to look up various topics in your visits to the site. There is more than a decades'-worth of information here, and the best threads are those with feedback from the...

eszy23, One has to remember that there is a LOT of piping and some large cylindrical components in the typical GE-design Frame 7E/EA heavy duty L.O. tank/reservoir. The L.O. Coolers, the L.O. Filters, and a lot of piping are inside the tank, so L.O. volume is not directly proportional to L.O...