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Yassar, Are you concerned about a leak or leaks? Increased consumption when the oil is hot? Are you having to top off the tank more often than it would otherwise seem necessary? It's true--most liquids expand when heated. But, then most everything expands when heated, right? Including...

Neo, I believe the 33.4% value you are referring to is an upper limit on acceleration control--not the actual value of FSR achieved during acceleration (at least I hope it's not the actual value achieved during acceleration control!). Just because the steam turbine governor has to be in...

GE, The gas generator of GE LM units is an aircraft engine, and most aircraft engines are built with bearings and components that require synthetic oil for proper lubrication and cooling. The power turbine is NOT used on aircraft, and as such, the oil used for it does not have to be...

Killz has it almost correct, in that the IGVs are used to control the air flow into the combustors--and for DLN combustors it's very important, critical, really, for the IGVs to control air flow since premix operation is borderline unstable to begin with. The design of DLN-I combustors is to...

Neo, Seems my reply to this post never got posted.... I've been having problems with this recently; don't know if it's my end or what, but, here goes again. There are good assignments, and there are bad assignments, and there are no-win assignments. A no-win assignment is one where no...

Arianna, Sounds like the filters are relatively new. When was the turbine last washed before the new filters were installed? What is the nature of the "dirt" on the turbine? No filter arrangement is 100% effective for every environment. What type of environment is the turbine located...

fluidflow, Pretty good description; but I would be surprised if FSR actually goes to 33% during acceleration. If it does, then something is wrong with the starting means/torque converter or the unit is being accelerated very fast (much faster than it should be) and somehow exhaust temp...

Izhar, The description below presumes your questions refer to a GE-design heavy duty gas turbine. 1) IGVs do not introduce exhaust swirl; they control the air flow into the axial compressor. When the air leaves the axial compressor it makes a 180 degree turn as it enters the can annular...

arun, Okay, .... Under your scenario with three gen-sets operating in parallel, one in Isoch and the remaining two in Droop, if you change the Droop setpoint of one of the Droop machines the load of that Droop machine will change <b>AND</b> the load of the Isoch machine will also change by...

SB, The section you provided seems to be from a very early Mark IV Control Specification. The Mark IV used fixed point math, and the documentation was very cryptic and could be confusing. Fixed point math requires the use of shifts to keep the binary maths and the decimal maths "together."...

MJ, You should be able to find the pressure listed on the Device Summary for the machine. The hydraulic accumulator, AH-1, should be listed in the Device Summary near the very front of the document. If the turbine was provided by GE, you should be able to find the Device Summary document...

Neo, What the heck is a "DEH"?

Neo, Whenever a field engineer says he or she is going on a "trip of a lifetime" it means he or she has been given a really bad assignment... I have returned a couple of days early from mine, having narrowly averted what could have been a really bad situation. The problem<b>s</b> are all...

fluidflow, Please list the events you believe occur during a start from zero speed, including when you think fuel and ignition occurs. The list doesn't have to be detailed; here's an example: -- Select AUTO -- Operator-initiated START -- Shaft breaks away from zero speed -- Unit...

Neo, First, you (and anyone else reading this) is quite welcome for any help or insight I may have provided. Second, I have been offered a last-minute holiday in the South Pacific Ocean and I'm going! I don't plan to check "the Internet" for about a week, maybe a week-and-a-half. I will...

SB, Inversion masking. Okay. I have to make this short as I've just been given a last-minute opportunity for a holiday in the South Pacific Ocean that one dreams about, and I'm going to take advantage of it. So, I'm leaving tomorrow and have just a few minutes. I'll check this thread on my...

Batman, You're very welcome. Thanks for the feedback!

saha, GE frequently leaves some unused signals in the CSP--especially in Mark V. Sometimes, as much as 60% of the Control Constants listed in the Control Constants Display are not used for a particular turbine. Unused logic signals are set to logic "0" by default--but if forced to logic "1"...

otised, I'm going to use 'Engineering Inertia' in the future, probably many times. You're so PC (Politically Correct)!

shunli, Pcc - Pressure-Combustion Chamber (the pressure inside the combustion liner Cross-talk - flow between combustors through piping that is not being used to provide fuel or air to the combustor Hope this helps!