STEAM trbine fundamentals course 0501 - Tectrapro.com · 2018-06-07 · compressor, HP turbine, LP...

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Course 0611

LM6000 Combustion Turbine

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Course GEN01A_0611_B5 – LM6000 Combustion Turbine



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LM6000 Combustion Turbine Course Chapter 1 – Combustion Turbine Overview This chapter provides a brief overview of the LM6000 gas turbine, including its components and support systems. The LM6000 is an aero-derivative design gas turbine. For this course, a base LM6000 unit with a single annular combustor and SPRINT water system is used.

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611_B5_Ch1 – Overview

1. Overview

a. The LM6000 turbine is a 43MW aero derivative machine with spray intercooling,

which has the acronym “SPRINT” and with Enhanced SPRINT called “E-

SPRINT,” power output can be augmented up to 47.5MW.

Classroom Discussion Point:

1. SPRINT is a compressor water injection system that cools the air flowing into

the machine. This cooling will increase the density of the air, resulting in

more mass flowing through the machine. More mass equals higher megawatt

production. This optional system produces around a 10% increase in

megawatt output.

2. The LM6000 combustion turbine features a quick 5-minute start and can

reach full load within 10 minutes.

3. Popular models available:

a. LM6000-PC, SAC, 25ppm NOx, 43MW to 47MW with SPRINT.

b. LM6000-PD, DLE, 15ppm NOx, 43MW to 47MW with SPRINT.

c. LM6000-PF, DLE / -PB model is older.

d. LM6000-PG, SAC, 25ppm NOx, 52 to 58MW with SPRINT.

e. LM6000-PH is a DLE unit, 15ppm NOx, 50MW to 52MW with

SPRINT.

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2. Turbine Design

a. The turbine is unique in that it is a two-speed, two pressure system, of shaft

within a shaft design.

b. There are four sections to the turbine, a low pressure compressor, high pressure

compressor, low pressure turbine, and high pressure turbine.

c. The low pressure compressor and low pressure turbine are the outer-sections

and are connected by the inner rotor.


The LM6000 combustion turbine is based on the CF6-80C2 aircraft engine found on

Boeing 747 airliners. The LM6000 and aircraft model share an identical HP

compressor, HP turbine, LP turbine, and combustor.


4. SAC refers to a single annular combustor equipped with 30 nozzles. DLE

refers to dry-low emission model that uses nozzles with multiple tips and

staged fuel injection.

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3. Low Pressure System

a. The generator attached to this turbine is coupled at the low pressure compressor

side. The low pressure system rotates at 3,600 rpm.

b. The low pressure rotor is located within the high pressure system rotor.

4. High Pressure System

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a. The high pressure compressor and high pressure turbine are located between

the low pressure sections and connected by the outer rotor of the machine.

b. The high pressure system rotates at 10,350 rpm.

5. Accessory Gearbox

a. The accessories motive force is provided from the high pressure rotor. The

accessory gearbox located below the high pressure compressor is the prime

mover for the lube oil and hydraulic pumps.

b. The starter is also mounted on the accessory gearbox for startup and various

turning operations.

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6. Inlet and Transfer Gearboxes

a. The inlet gearbox located inside the rear low pressure compressor section,

connects the high pressure rotor to the radial shaft to drive the accessory

gearbox.

b. The section connecting the radial shaft to the accessory gearbox is the transfer

gearbox which contains a short horizontal shaft for this purpose.

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7. Thrust and Roller Bearings

a. Bearing 1 at the forward compressor is the thrust bearing for the low pressure

system.

b. Bearing 4B between the high pressure compressor and high pressure turbine is

the thrust bearing for the high pressure system.

c. All other bearings in the turbine are roller bearings, each system containing three

of them.

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8. Generator

a. The generator is an open ventilation unit with brushless excitation, self-contained

lubrication system, and lift oil system.

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Test

1) Overview

The acronym “SPRINT” performs what function for the LM6000 turbine system?

A. Air heating

B. Fuel augmentation

C. Intercooling

D. Mass addition

2) Outer Sections

The outer sections of the turbine are part of the ____________system. A. Generator

B. Low pressure

C. Outer rotor

D. High pressure

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3) Outer Shaft

The outer shaft of the turbine is part of the ____________system. A. Generator

B. Low pressure

C. Outer rotor

D. High pressure

4) Accessory Gearbox

The accessory gearbox is driven by which system?

A. Low pressure generator

B. Hydraulic

C. Accessory skid

D. High pressure

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5) Generator

Which of the following is a feature of the LM6000 generator?

A. Hydrogen cooled

B. Tilt pad bearings

C. Brushless excitation

D. Water cooled

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Test Answers

1) C

2) B

3) D

4) D

5) C

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STEAM trbine fundamentals course 0501 - Tectrapro.com · 2018-06-07 · compressor, HP turbine, LP...

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Transcript of STEAM trbine fundamentals course 0501 - Tectrapro.com · 2018-06-07 · compressor, HP turbine, LP...