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cactus_chris, eh? Contrary to popular belief, TTRXB does not mean 'Turbine Temperature Reference-Exhaust, Base (Load). It means 'Turbine Temperature Reference-Exhaust, Biased'--where a bias can be added to the lesser of TTRXP or TTRXS--when a permissive is set to a logic "1". It's typically...

Oryan, I've often had the very same thoughts when considering the differences between inverters and generators. I've done no World Wide Web searching on this topic, and I suspect there is some information available somewhere--possibly from inverter manufacturers. I quite often find that...

ControlQuest, Please provide the current values of the four gas leak test Constants, as well. And please tell about the situation the site is in. Is this a new unit (turbine) installation or a controls upgrade/retrofit? And, what is the actual firing speed of the unit? And most...

Arun/kumara, Are you also continuously bleeding air/water from the lines of the other unit back to the cooling water tank? Have you measured the temperature of the water being bled from the lines back to the cooling water tank? I would think the formulae for calculating flow using the...

> also if my rpm is fixed, how may i get more power by > increasing load and fuel? what would be the explanation. The explanation is: Torque. Even though speed is fixed, when the energy flow-rate is increased the torque will increase. It's like riding a bicycle at a steady speed on a flat...

Controlquest, The Gas Leak Test is a test which has been implemented to protect against stop valve leakage which could lead to an explosion, damage to equipment and possible loss of life. You are correct in that no such test was performed for decades. I believe there is an API standard...

jannatul, you one basic question needs many corrections. The size of an engine is equal to the volumetric capacity--not the amount of fuel to be supplied. You just need to supply sufficient fuel to achieve the proper stoichiometric mixture for combustion (presuming you're referring to an...

Hothifah, 1) First, you need to understand that generators are electrical machines that convert torque from the prime mover (steam turbine in your example) into amperes, just like (electric) motors are electrical machines that convert amperes into torque to pump water or lift people/goods in...

> Could you please explain how k86GLTA & K86GLTB was derived? The answer depends on the version of the gas leak test; there are at least two factory versions and more which have been notified in the field. There is a formula for each of the two factory versions, but unfortunately they...

AW, Have you asked GE this question? If so, what was their response? Is there a cooler in the inlet air piping to the atomizing air compressor? If so, is there a temperature regulating valve to control the flow of water to the cooler? I've not seen a screw-type AA compressor, but I've...

Arum/kumara, To properly calculate a differential across an orifice one would need to know the orifice diameter, and to know a lot about the design and construction of the piping (length of straight runs of piping before and after the orifice; inside diameter of piping; etc). To my...

delirios, How are you measuring the accuracy of the speed pick-ups--by a value on a display or a meter? Are you looking at the output of the speed pick-up directly using a DMM (digital multi-meter with frequency-measurement capability), or the scaled feedback on a display? How do you...

anil, This type of vibration sensor is mounted on the bearing cap/housing/cover. It is non-contact--meaning it does not contact the rotating shaft. The common type of construction uses a small core permanent magnet suspended on a spring inside a coil. Vibration (movement) causes the core...

Arun/kumara, My presumption was that the cooling water module was working properly--which I should have stated, but didn't; sorry. One of the things which happens quite often with cooling water modules is that the strainer upstream of the pumps gets choked (blocked) and restricts flow...

Whenever a Aux. Hydraulic Pump is started it takes a short amount of time to build up pressure--the amount of time depends on many factors including what servo-valves are trying to do, how dirty the hydraulic filters are (a higher dp usually requires a little more time to build pressure...

AhmedWaleed, You're missing the main point of troublshooting problems like this: When did this problem start? After a maintenance outage, when the thermocouples might have been removed and re-installed, or might have been disturbed by the highly caring, careful and sensitive mechanics...

Arun/kumara, Do the self-cleaning inlet air filters run continuously? Do you hear air flowing through the air dryer between the compressor extraction and the filter house continuously? I suggest the easiest way to determine if the "loss of air" is being caused by the self-cleaning inlet...

zaidhrm, Although you use abbreviations and acronyms every day at your site, many of the acronyms are not known to everyone, and many sites use different words/terms/abbreviations/acronyms for the exact same component or piece of equipment. So, when using abbreviations/acronyms please take...

Arun/kumara, I want to explain the Lean-Lean-to-Premix transfer a little better in the hopes that it will help in understanding the problem--because hopefully you can better tell us what's happening/not happening when. When the unit reaches the L-L-to-Premix transfer temperature (1077 deg...

Arun/kumara, It's extremely difficult to understand how "less air" can be going to the combustion system during initial Premix operation with IBH off. The ONLY way to limit air flow is with the IGVs--that's the only way. So, while it might be possible the IGV LVDT calibration is incorrect...