PP57 REV A

Page 1 of 3 COPYRIGHT, 2009 GE PACKAGED POWER, L.P., ALL RIGHTS RESERVED. THIS DRAWING IS THE PROPRIETARY AND/OR CONFIDENTIAL PROPERTY OF GE

PACKAGED POWER, L.P., AND IS LOANED IN STRICT CONFIDENCE WITH THE UNDERSTANDING THAT IT WILL NOT BE REPRODUCED NOR USED FOR ANY PURPOSE

EXCEPT THAT FOR WHICH IT IS LOANED. IT SHALL BE IMMEDIATELY RETURNED ON DEMAND, AND IS SUBJECT TO ALL OTHER TERMS AND CONDITIONS OF ANY WRITTEN AGREEMENT OR PURCHASE ORDER WHICH INCORPORATES OR RELATES TO THIS DRAWING.

LM6000 5-Minute Start

Introduction The GE AEP LM6000 package has the unique ability to reach full power (simple-cycle) from a cold start within 5 minutes for special applications. A 5-minute start cycle is significant since many power pools allow spinning reserve credit or for customer’s that require power for critical loads. The LM6000’s 5-minute capability is unique in that it does not increase maintenance costs or intervals provided the fast start events are limited to 4 times a year. The operating flexibility of the utility grid will be greatly enhanced and the overall system production costs will be substantially lower.

Unlike turbo machinery using solid forgings and thick wall castings, the LM6000 turbine is designed as a flight engine, allowing a high tolerance to cyclic duty. Its lightweight design (rotor and castings are constructed of thin-wall, high-strength alloy materials) allows it to operate efficiently under high thermal stress gradients and concentrations. This design effort has dramatically increased low-cycle fatigue life.

Description The following provides start and ramp sequence details for obtaining 5-minute start to full load. Reference Figure 1, LM6000 5-Minute Start Profile and LM6000 10-minute start paper PP08 latest revision.

1. The LM6000 gas turbine 5-minute start applications will be operated for back up and peaking duty. There would be limited 5-minute start events up to maximum 4 times per year. If the unit were stated for 5-minute start > 4 times a year there would be an increase in maintenance costs.

2. For 60 Hz applications, in order to eliminate the time required to fill the generator run down tanks, the 7.5 HP AC lube oil supply pump would need to be operated continuously. For 50 Hz applications the run down tanks would not need to be filled prior to light off, as the DC MLO pump would backup the 2 each AC MLO pumps.

3. Gas turbine purge timer is set for 15 seconds, which would be typical for simple cycle exhaust systems in accordance to NFPA 37. For exhaust systems that are combined cycle or have SCR systems, gas turbine purge credit could be obtained per position paper PP07.

GE Energy Aero Energy Division

Position Paper #57

PP57

Rev A

Date: October 12, 2009

16415 Jacintoport Blvd

Houston, TX 77015

USA

T 001-281-864-2803

F 001-281-864-2459

PP57 REV A

Page 2 of 3 COPYRIGHT, 2009 GE PACKAGED POWER, L.P., ALL RIGHTS RESERVED. THIS DRAWING IS THE PROPRIETARY AND/OR CONFIDENTIAL PROPERTY OF GE

PACKAGED POWER, L.P., AND IS LOANED IN STRICT CONFIDENCE WITH THE UNDERSTANDING THAT IT WILL NOT BE REPRODUCED NOR USED FOR ANY PURPOSE

EXCEPT THAT FOR WHICH IT IS LOANED. IT SHALL BE IMMEDIATELY RETURNED ON DEMAND, AND IS SUBJECT TO ALL OTHER TERMS AND CONDITIONS OF ANY WRITTEN AGREEMENT OR PURCHASE ORDER WHICH INCORPORATES OR RELATES TO THIS DRAWING.

4. The gas turbine warm-up timer is set for 60-seconds. During this 60-second warm-up timer the generator can be synchronized to utility grid and gas turbine would ramp to minimum load. Following completion of warm up timer the gas turbine could be ramped to full load.

5. The gas turbine load ramp rate would be 500 kW/sec, total of 90 seconds to full load.

6. LM6000 would achieve full load, 45 MW in 5 minutes from cold start.

Table 1, 5-Minute Fast Start Sequence

Start initialization, enclosure purge

15 seconds

Engine/Stack Purge, 60’ Stack 15 seconds

Accel to sync idle 2 minutes

Synchronize to Grid, warm up at min load

1 minute

Accel to full load 90 seconds

Total 5 minutes

Summary

By following the special start sequence called out in this paper, LM6000 would be capable of 5-minute start to full load. LM6000 5-minute start events would be limited to maximum 4 times a year.

PP57 REV

Page 3 of 3 COPYRIGHT, 2009 GE PACKAGED POWER, L.P., ALL RIGHTS RESERVED. THIS DRAWING IS THE PROPRIETARY AND/OR CONFIDENTIAL PROPERTY OF GE PACKAGED POWER, L.P., AND IS LOANED IN STRICT CONFIDENCE

WITH THE UNDERSTANDING THAT IT WILL NOT BE REPRODUCED NOR USED FOR ANY PURPOSE EXCEPT THAT FOR WHICH IT IS LOANED. IT SHALL BE IMMEDIATELY RETURNED ON DEMAND, AND IS SUBJECT TO ALL OTHER TERMS AND CONDITIONS OF ANY WRITTEN AGREEMENT OR PURCHASE ORDER WHICH INCORPORATES OR RELATES TO THIS DRAWING.

GE Aero Energy LM6000

0

2000

4000

6000

8000

10000

12000

0 30 150

Time (Sec)

LM

60

00 H

PC

-R

PM

Engine & Stack Purge

15 Sec

Turbine Warm-up

60 Sec Total

Ignition & Ramp Up

2 Min (120 S)

Ramp to Full Load

90 Sec

500 kW/SecStart Turbine Enclosure Purge

15 Sec

Hold until NSD Rotor is > 1250 RPM’s

Standard Start Sequence (5 Min)

300 RPM/Sec

•Start 60 Sec Timer•Enable Sync•Initiate Breaker Closure

•Ramp to Minimum Load

Notes:

1. Generator Lube Oil Pump

must be running to maintain a

“Ready to Start Condition” for

60 Hz applications

2. Simple cycle operation only, no

SCR or HRSG/Boiler

21015 300255

Figure 1 - LM6000 5-Minute Start Profile