Twelve gas turbine frames that change hands on the secondary market, side by side: class, simple-cycle output, shaft speed and the grid each one serves.
Output is simple cycle. Each figure matches the frame’s own page, linked in the last column.
| Frame | Class | Output | Shaft speed | Grid | Also known as | With Genloop |
|---|---|---|---|---|---|---|
| GE Frame 5 | Heavy frame | 20 to 26 MW | 5,100 rpm, geared | 50 or 60 Hz | MS5001; the two-shaft MS5002 is a mechanical drive | Sell one to Genloop |
| GE Frame 6B | E-class | 38 to 45 MW | 5,163 rpm, geared | 50 or 60 Hz | 6B.03, MS6001, PG6581B | Sell one to Genloop |
| GE 7EA | E-class | 80 to 90 MW | 3,600 rpm, direct drive | 60 Hz | 7E.03 | Sell one to GenloopSourced to order |
| Siemens 501D5 | E-class | 96 to 121 MW | 3,600 rpm, direct drive | 60 Hz | Westinghouse W501D5 and W501D5A, SGT6-3000E | Sell one to Genloop |
| GE 9E | E-class | 105 to 147 MW | 3,000 rpm, direct drive | 50 Hz | 9E.03, 9E.04, Frame 9E, MS9001E | Sell one to GenloopOne in the register |
| Alstom GT11N2 | Heavy frame | 113 to 115 MW | 3,600 rpm, geared for 50 Hz | 50 or 60 Hz | ABB GT11N2; supported by GE Vernova | Sell one to Genloop |
| Siemens V94.2 | E-class | 150 to 187 MW | 3,000 rpm, direct drive | 50 Hz | SGT5-2000E, Ansaldo AE94.2 | Sell one to GenloopA block in the register |
| Siemens 501F | F-class | 150 to 260 MW | 3,600 rpm, direct drive | 60 Hz | Westinghouse W501F, SGT6-5000F | Sell one to Genloop |
| GE 7FA | F-class | 178 to 239 MW | 3,600 rpm, direct drive | 60 Hz | 7F: 7F.03, 7F.04, 7F.05 | Sell one to Genloop |
| GE 9FA | F-class | 256 to 294 MW | 3,000 rpm, direct drive | 50 Hz | 9F; the current version is the 9F.04 | Sell one to GenloopA plant in the register |
| GE LM2500 and TM2500 | Aeroderivative | 22 to 37 MW | 3,000 or 3,600 rpm, direct drive | 50 or 60 Hz | +, +G4 and +G5 models; the TM2500 is the same engine on trailers | Sell one to GenloopFour TM2500s in the registerTwo LM2500s in the register |
| GE LM6000 | Aeroderivative | 40 to 58 MW | 3,600 rpm, geared for 50 Hz | 50 or 60 Hz | PA, PC, PF, PG and PH models; SPRINT | Sell one to GenloopSourced to order |
Genloop also buys steam turbines and Wärtsilä engine plants, which are not sold by frame. Which grid each country runs on is in 50 Hz and 60 Hz by country.
A buyer starts with the grid, then the output, then the class. The name only tells them which data sheet to open.
E-class and F-class are two generations of heavy frame. F-class machines fire hotter, so they make more power and use less fuel for each megawatt-hour. E-class machines are simpler and accept a wider range of fuels.
Simple cycle, across the versions of each frame from early units to current ones. A given unit makes what its own nameplate says, and less on a hot day or at altitude.
A direct-drive machine turns at the speed its grid sets: 3,000 rpm for 50 Hz, 3,600 rpm for 60 Hz. It cannot be moved to the other grid at a sensible cost. A geared machine can be built for either.
Makers rename their machines. The GE 7EA became the 7E.03, the Westinghouse 501F became the Siemens SGT6-5000F, and the Siemens V94.2 became the SGT5-2000E. A used unit is usually known by the name on its nameplate.
Short answers. The terms are defined in the glossary.
The GE 9E is the 50 Hz machine in the 7EA’s class, and the GE 9FA is the 50 Hz counterpart of the 7FA: GE describes the 9FA as an aerodynamic scale of the 7FA. On the Siemens side, the V84.2 is the 60 Hz sibling of the 50 Hz V94.2.
Geared heavy frames such as the GE Frame 5 and Frame 6B, the Alstom GT11N2, and the aeroderivative GE LM2500, TM2500 and LM6000. A unit is still built for one frequency, so the package has to match the grid it is going to.
They are two generations of heavy-frame gas turbine. E-class machines such as the GE 7EA, GE 9E and Siemens V94.2 run at lower firing temperatures, are simpler and accept a wide range of fuels. F-class machines such as the GE 7FA, GE 9FA and Siemens 501F entered service around 1990 with higher firing temperatures, more output and better efficiency.
A heavy frame is designed for power generation from the start: large, long-lived and maintained in place. An aeroderivative is built around an aircraft engine core, the LM2500 around the CF6-6 and the LM6000 around the CF6-80C2. It is lighter, reaches full load in 5 to 10 minutes and can be exchanged on site in a 2 to 3 day outage, in a smaller unit size.
Genloop buys every frame in the table from its owners as principal. Its register today holds a GE 9E, a GE 9FA combined cycle plant, a Siemens V94.2 block, four GE TM2500 mobile units and two GE LM2500s, and it sources other frames to order.
Terms such as simple cycle, direct drive and hot gas path are in the glossary.