1. Ship Propulsion Systems
STEAM
DIESEL
OTHER
Conventional
Nuclear
Slow Speed
Medium Speed
Gas Turbine
Combined Cycle
GAS TURBINE & COMBINED CYCLE PROPULSION

2. Aero-Derivative Gas Turbine
INTAKE
POWER TURBINE
EXHAUST
GAS GENEATOR
“JET ENGINE”
HIGH ENERGY GAS
MECHANICAL OUTPUT

3. Aero-Derivative Gas Turbine
POWER TURBINE
GAS GENEATOR

4. AIR M GAS GENEATOR SPARK PLUG FUEL COMBUSTION CHAMBER HP AIR
COMPRESSOR
COMBUSTOR RING
COMPRESSOR TURBINE
Electric, Air or Hydraulic Motor start

5. Aero-Derivative Gas Turbine
POWER TURBINE
GAS GENEATOR

6. Aero-Derivative Gas Turbine
GT ELECTRIC DRIVE
controller
Other GENERATORS
COUPLING M
HS PINION
GENERATOR
1st REDUCTION GEAR
PROPULSION “BUS”
PROPULSION MOTOR

7. Aero-Derivative Gas Turbine
DOUBLE REDUCTION GEAR…
… with a CRP
THRUST BEARING
AHD
AST
STERN TUBE BRG
HS PINION
LS PINION
1st REDUCTION GEAR
LINE SHAFT BRG
2nd REDUCTION GEAR

8. CRP: Controllable-Reversible Pitch propeller
Blades pivot on axes radial to the propeller shaft
Pitch is determined by Blade angle
“Feathering” is Zero pitch
Negative pitch yields astern thrust
At constant engine RPM, ship speed is controlled by pitch
Speed = Pitch x RPM

9. CRP propellers…..
,,, are common with Gas Turbine propulsion and many Medium Speed Diesel propulsion ships
… are occasionally used with Slow Speed Diesels
… and are rare with Steam Turbine propulsion

10. Aero-Derivative Gas Turbine
DOUBLE REDUCTION GEAR…

11. Aero-Derivative Gas Turbine

12. Aero-Derivative Gas Turbine
REVERSING GEAR
SHAFT BRAKE
ASTERN
HS PINION
AST
AHD
AHEAD
HS PINION
CLUTCHES
FIXED PITCH PROPELLER
Mechanical
Hydraulic
Pneumatic
Electro-magnetic

13. … may also be used with non-reversing Medium Speed Diesel Engines
REVERSING GEAR ...
AST
AHD
CLUTCHES
… may also be used with non-reversing Medium Speed Diesel Engines
Mechanical
Hydraulic
Pneumatic
Electro-magnetic

14. … are REVERSING ENGINES
Many MEDIUM SPEED Engines …
… and most SLOW SPEED Engines …
… are REVERSING ENGINES

15. LP DOUBLE REDUCTION GEARS … Twice! HP … are utilized on the TSES VI
AHD
Twice!
HP, HS PINION HP
HP, 1st REDUCTION GEAR
HP, LS PINION LP
AST
LP, HS PINION
Common BULL GEAR (2nd REDUCTION GEAR)
LP, 1st REDUCTION GEAR
LP, LS PINION

16. M ELECTRIC DRIVE common with GAS TURBINES controller Other GENERATORS
Also used with….
Medium Speed Diesels (Diesel-Electric Drive)
Non-reversing steam
turbines
(Turbo-Electric Drive)
PROPULSION “BUS”
PROPULSION MOTOR

17. COGES G G M … and COMBINED CYCLES
STEAM TURBINE
“WASTE HEAT” BOILER M G GT
controller
COGES
Combined Gas and Steam Turbine Electric System
e.g., Royal Caribbean and Celebrity Cruise Lines

18. COmbined Diesel And/Or Gas turbine cycle
Primary Plant: Diesel GT C
Boost Power Plant: Gas Turbine C
CODOG: GT takes over for Diesel(s) at high power
CODAG: GT and Diesel(s) running at high power

19. The Engine Order Telegraph (EOT)
STBY
FWE
STOP
AHEAD
ASTERN
FULL
HALF
SLOW
BRIDGE TELEGRAPH
E.R. TELEGRAPH

20. The Bell Book ASTERN AHEAD STAND-BY D or “STDBY” STOP O or X FULL HALF
EMERGENCY FULL
FULL
HALF
SLOW
DEAD SLOW
ASTERN
EMERGENCY FULL
FULL
HALF
SLOW
DEAD SLOW E E D D
STAND-BY D or “STDBY”
STOP O or X

21. The Bell Book ARR Tenerife, CI 29 May 2005
ARR C ; M
0730 X
0834
0736 X
0840
0741 X
0844
0815
0854 D
0821 X
0857
0828 X
FWE
0915
0829 C M
0833