Search results

Omair, When did this problem start? Did this start happening after a maintenance outage? If so, what was done to the fuel control valve(s) and the control system during the maintenance outage? Did this start happening after a turbine trip from load? If so, what caused the trip? Was...

Mahendra, The technical reason is that a high-voltage AC induction motor draws a LOT of in-rush current during starting, especially when it's an "across-the-line" starter (directly connected to the voltage source, through a contactor--as opposed to a star-delta starter or a variable frequency...

Emesco, You'll probably find the suction of the lift oil pump is pressurized by either the L.O. bearing header OR the discharge of the Auxiliary L.O. Pump(s) (a GE-design Frame 9E heavy duty gas turbine usually has one Auxiliary L.O. Pump, while a GE-design Frame 9F/FA heavy duty gas turbine...

Thirty-three thumbs up for MIKEVI!!! He said it MUCH better than the response I have been working on for two days. Open system means many things to many people. And we do live. in a predominantly capitalist world and people, companies and corporations are allowed to profit and protect their...

Jolek, >Do you experience check valves stuck when not running on >liquid fuel for some time and how do you deal with it? I'm not the original poster, but from one of the screenshots in the OP's original thread it doesn't look like this unit uses liquid fuel check valves, or liquid fuel...

Aptx4869, I believe the tool you are referring to is called a "swirl chart." It's called a swirl chart because the hot gases traveling through the turbine section after leaving the individual combustors do not mix and homogenize, rather they "bend" as it were. So, if combustor #14 was not lit...

Aninda, To operate a GE-design heavy duty gas turbine with a Speedtronic/Mark* turbine control system in Free Governing Mode all one needs to do is use the RAISE and LOWER SPEED/LOAD targets in the HMI to change load. Contrary to wildly popular and false belief--the unit load will not drift...

CRSwanson, Thanks for the clarification. I don't know what a DGA monitor is and what communication methods it is capable of (MODBUS; OPC; etc.). CIMPLICITY (or PROFICY, or whatever they're calling it these days) has some pretty good native communication capabilities, meaning that it can talk...

eagle1, I hope you will take advantage of the wealth of posts here on control.com related to the GE Speedtronic Mark V turbine control system. You can use the 'Search' function at the far right of the Menu bar of every control.com web page. Have a look at the 'Search' Help (the question mark...

CRSwanson, Excellent question, and one which was recently asked here on control.com. No one really knew when the next version of turbine control was scheduled for release. But, based on GE's recent actions in the turbine control arena, it's probably a safe bet they are developing the "Mark...

CRSwanson, 1) I believe the Mark VIe is a fine, robust, purpose-built control system very suitable for turbine control and plant-wide DCS control. The issue for me is that it's very likely there will be at least two groups that will be providing equipment--one for the turbines, and one for...

Jhon Knot, The most likely cause of a sudden drop in axial compressor discharge pressure was an axial compressor stall. See this link: https://en.wikipedia.org/wiki/Axial_compressor

Thank you for the feedback!

MAHENDRA, The GE-design heavy duty gas turbine control community has been active here at control.com for more than 11 years, during which time there have been a LOT of questions and answers. Most questions have been asked and answered several times. Usually, we try to explain abbreviations...

glenmorangie, The pictures, by themselves, are inconclusive. And, there is a paucity of information and responses to questions provided by the original poster. I still have an issue with how one of fourteen hoses could have backflow--and where the flow would go to. (For flow to occur...

Most GE-design F-class heavy duty gas turbines have combustion systems that reduce NOx (Nitric Oxode) emissions without using water as a diluent to reduce emissions. If the unit also burns liquid fuel, then usually water (or steam) is necessary to reduce NOx emissions when burning liquid fuel...

I'm curious to know why you believe there is such a test for field service personnel? (There is a prevailing belief in the OEM that engineers are no longer required for servicing and commissioning heavy duty gas turbine control systems, that technicians can do the job just as well for less...

Any explosion (or combustion) requires an combustible mixture of fuel (and oxygen). It's very difficult (for me) to understand how a single flex hose connected to a manifold which is supplying thirteen other fuel nozzles/combustors at the same time can experience a backflow of hot combustion...

Mohamedibr752, There are Mark VIe upgrades, and there are Mark VIe upgrades. GE loves to sell what has been variously called a "Mark Ve" and a "Mark V Life Extension (LE)" and "Mark V Migration" and several other names--but which retain the cores and plastic card carriers and ribbon cables...

Nothing was said about leaving the number of exhaust T/Cs up to the Customer; if GE is providing the control system they will choose the number of exhaust T/Cs for the Customer. They feel as the OEM/designer they have the authority to set the number of exhaust T/Cs that will be used/required for...