Gas GeneratorsGas GeneratorsPresented by MEA/A ColesPresented by MEA/A Coles

31 Oct 0531 Oct 05

ObjectivesObjectives

• Explain what a Gas Turbine is.Explain what a Gas Turbine is.• Describe the Air Intake System.Describe the Air Intake System.• Portray the purpose of basic Watch Portray the purpose of basic Watch

Keeping.Keeping.• Talk through Dry & Wet motoring, Talk through Dry & Wet motoring,

Cleaning and Inhibiting.Cleaning and Inhibiting.• Explain Trips and Breakdowns. Explain Trips and Breakdowns. • Operation of BCF.Operation of BCF.

AimAim

To improve personnel's basic To improve personnel's basic knowledge knowledge

on propulsions part of ship.on propulsions part of ship.

What are Gas What are Gas Generators?Generators?

• Energy to propulsion COGOG.Energy to propulsion COGOG.• Gas is more efficient than steam and Gas is more efficient than steam and

less costly than Nuclear.less costly than Nuclear.• 3 Engines – 3 Engines – Olympus TM3BOlympus TM3B

Tyne RM1CTyne RM1C

Spey SM1a/1cSpey SM1a/1c

AIR INTAKE:AIR INTAKE:11stst, 2, 2ndnd, 3, 3rdrd Stage Filters Stage Filters

• 11stst & 3 & 3rdrd -- Tortuous PathsTortuous Paths• 22ndnd Knitmesh Knitmesh -- Filters DirtFilters Dirt

Plenum Chamber & Plenum Chamber & Splinter / SilencerSplinter / Silencer

• Plenum Chamber Plenum Chamber -- Room AccessRoom Access• Ceiling AccessCeiling Access -- Engine RemovalEngine Removal• Blow down DoorsBlow down Doors -- Emergency Air Emergency Air

IntakeIntake• Splinter / SilencerSplinter / Silencer -- Aerofoil Smoothes Aerofoil Smoothes

AirAir

Stone Guard, Transition Stone Guard, Transition Duct, Cascade BendsDuct, Cascade Bends

• Stone Guard Stone Guard - - Prevents FOD Prevents FOD ingress ingress to Engines.to Engines.

• Transition DuctTransition Duct - - Smoothes Smoothes smoothed smoothed air for air for Aerodynamic Aerodynamic entrance.entrance.

• Cascade BendsCascade Bends -- Changes Changes air in a 90 air in a 90 degree direction.degree direction.

Intake Flare, Nozzle Intake Flare, Nozzle BulletBullet

• Intake FlareIntake Flare Guides Air.Guides Air.

High Velocity.High Velocity.

Compressor Compressor CleaningCleaning

• Nozzle BulletNozzle Bullet

Leads air to Leads air to

LP Compressor LP Compressor VeinsVeins

LP CompressorLP Compressor• LP CompressorLP Compressor -- Draws in AirDraws in Air

Rotor & Stator BladesRotor & Stator Blades• Blow off VVBlow off VV -- Tyne’s OnlyTyne’s Only

HP CompressorHP Compressor• HP CompressorHP Compressor --

Compress’s air Compress’s air

nine timesnine times

Combustion Chambers, Combustion Chambers, Igniters, BurnersIgniters, Burners

• Combustion takes place Combustion takes place inside cans.inside cans.

10 Tyne, 8 10 Tyne, 8 OlympusOlympus

• Burner manifold circles the Burner manifold circles the chambers.chambers.

• 2x Igniters set alight 2x Igniters set alight

HP Fuel & HP AirHP Fuel & HP Air

3&8 Tyne, 2&6 Olympus3&8 Tyne, 2&6 Olympus• Produces Exhaust GasProduces Exhaust Gas

HP TurbineHP Turbine

• HP TurbineHP Turbine -- Helps drive the Helps drive the memento of the memento of the

HP HP Compressor Compressor

LP TurbineLP Turbine

• LP TurbineLP Turbine -- Helps drive the Helps drive the memento of memento of

the LP the LP Compressor Compressor

PT TurbinePT Turbine

• LP TurbineLP Turbine -- Helps drive the Helps drive the memento of memento of

the LP the LP Compressor Compressor

Exhaust Gas, Exhaust Gas, Vent Intake and Exhaust Vent Intake and Exhaust

FlumeFlume• Exhaust GasExhaust Gas - - Leaves via Leaves via

FunnelFunnel• Intake by FlumeIntake by Flume - - Provides Provides

fresh air fresh air intake to cool intake to cool

module module• Exhaust by Flume -Exhaust by Flume - Ventura Ventura

effect by effect by exhaust gas’sexhaust gas’s

Basic Watch KeepingBasic Watch Keeping

Basic Watch KeepingBasic Watch Keeping

• Maintaining high standards.Maintaining high standards.• If unsure always ask.If unsure always ask.• Check – Check – Vibration, Leaks, Line Vibration, Leaks, Line

upup

Gauges, Acoustic Gauges, Acoustic TemperaturesTemperatures

Depression, ExhaustDepression, Exhaust

BCF, Vents, TripsBCF, Vents, Trips

Starting ProcedureStarting Procedure

Dry MotoringDry MotoringWhen?When?

• Failed StartFailed Start• Purge FuelPurge Fuel• Compressor WashingCompressor Washing• Air Start VV OperationAir Start VV Operation• Lubricate Fuel PumpLubricate Fuel Pump• 150hours Tyne, 100hours Olympus150hours Tyne, 100hours Olympus• Or every 2 monthlyOr every 2 monthly