Can someone please tell me why gas turbines particularly in LNG application are called 5D frame, 6 frame , 7 frame etc

 

Well, why are BMW automobiles "named" 3-series, or 5-series, or 7-series?

Whay are Volkswagens called "Golf," or "Fox," or "Jetta," or...???

Why are sheets of paper called A4, or b-size?

The actual names for GE-design Heavy-duty Gas Turbines are MS-3000 or MS-5000 or MS-7000 or MS-6000 or MS-9000 (MS stands for Model Series). In the beginning the smaller units Ilower power output) were the ones with the lower magnitude/value numbers--or said another way, the power output increased with the madnitude/value of the MS number. With the advent of the F-class units, A MS-7000F unit will have a greater power output than a MS-9000E...aren't marketers wonderful?

It's not clear when people began calling them Frame 3 (for the MS-3000 series) or Frame 6 (for the MS-6000 series), or even if there was a reason behind the name.

The alpha characters after each designation reflect a different version of each unit. A different compressor, a different nozzle configuration, a different exhaust diffuser configuration, a different firing rate.

There are even new numerical designations for newer units which denote the firing temperature and power output. (Again--ain't marketing people reall cool?)

These same designations are used for GE-design heavy-duty gas turbines in all industries: power generation, compressor drives, mechanical drive turbines, etc.

Units from other manufacturers have their own designation. One could ask, "Why does Siemens call their units V-93.n.n?" There's probably a logical reason--or at least there was when they were designated as such in the beginning.

markvguy

 

Frame size is an old terminology that originally came from electric motor sizes. GE adopted this as a general size for their turbines. GE turbines are nomally referred to as MS5001, MS5002 etc the 5 is the Frame size and the 1 or 2 is the number of turbine shafts. Correctly the exact turbine would be identified as MS5341P for example where the two middle numbers are the ISO output in HP and the final letter is the Model Revision. You talk about LNG machines, these are normally MS5002D, as they are two shaft and Revision D. The revison is only a model change made when GE significantly re-design the engine.

 

> Can someone please tell me why gas turbines particularly in LNG application
> are called 5D frame, 6 frame , 7 frame etc

because all gas turbines are set in a steel frame in which the frame can be adjusted without moving the actual turbine...and the number is in reference to the size of the turbine.

 

> because all gas turbines are set in a steel frame in which the frame can be
> adjusted without moving the actual turbine...

Can you please explain in more detail?

Thanks!

 

I found this question and comments while looking for some other info about a GE Frame-6000B gas turbine...

Here is why the Gas Turbines are designated as "Frames"

After WW-2 the first non-flight applications for Jet Engines was to replace the large diesel engines used in Diesel-Electric Locomotives with "Aircraft Jet Engines" (Today called Aero-Derivative Engines)

GE Locomotive (Erie PA) built several prototypes and a few production locomotives using Jet Engines aka Combustion turbines.

The program was not successful as the combustion turbines are better running at steady loads and the variable loading on a locomotive engine didn't quite suit the use of Gas Turbine Engines..

Back "In the Day" the Diesel Locomotives were specified by "Frame Size" bigger frames for bigger engines and generators....Consequently the term "Frame Size" stuck with the Gas turbines...

Larry

 

Can someone tell me where I can find Fiche Technique (or something similar) for Gas Turbines Alignment. Or Fiche Technique of Measurement for Gas Turbines during "C" inspection? (Alstom Gas turbines, 150MW especialy or other). Thank you in advance for your help and advice.