Post by ferryfast admin on May 10, 2012 10:26:39 GMT -5
GE Marine: Gas turbine hybrid propulsion
09 May 2012
GE Marine Press Release
GE Marine is to launch hybrid electric systems for military and commercial marine customers based on its LM aero-derivative gas turbines, motors and drives, to help reduce noise and improve fuel economy.
The company describes its hybrid system as cross-connecting the ship service power system with the propulsion system by placing an electric motor and its associated motor drive in the drive train. At lower speeds, the propulsion engines can be turned off and the electric motors provide cruising power.
“Many ship owners and builders are currently evaluating hybrid electric propulsion designs for existing or new build ships. Thanks to many years in this industry forming key partnerships, GE can now offer more comprehensive hybrid electric propulsion solutions for military and commercial customers,” said Brien Bolsinger, general manager, GE Marine, Evendale, Ohio.
GE says it has already provided components on seven gas turbine hybrid or electric powered ship classes in service or under construction, including the US Navy’s LHD 8 USS Makin Island, the German Navy’s F124 and F125 frigates, and the Italian and French FREMM frigates.
The following benefits are claimed for hybrid electric propulsion:
Improved fuel economy;
Fewer installed prime movers for reduced propulsion costs;
Reduced diesel maintenance costs;
Flexible, integrated power and propulsion systems to direct power as needed;
Improved combat capability.
Traditional COmbined Diesel Or Gas turbine (CODOG) or COmbined Diesel And Gas turbine (CODAG) frigates have two gas turbines and two diesels for propulsion and typically four diesels for ship service power. With GE’s hybrid electric arrangement, the two propulsion diesels can be eliminated and replaced by electric motors. This arrangement can reduce ship construction, propulsion equipment, and maintenance costs while helping reduce noise and improve combat capabilities.
GE’s LM2500 gas turbines, for instance, can be applied in a dual gas turbine hybrid arrangement versus a single gas turbine configuration to provide the lowest technical, cost, schedule and operational risk. If incorporated into an existing LM2500 CODOG ship design, GE believes a dual gas turbine configuration requires the fewest ship modifications. GE’s dual gas turbine system configuration has two completely independent shaft lines to provide significant redundancy and survivability.
Gas turbine hybrid electric systems provide low noise when cruising on the electric motors. Low noise, hybrid systems can use shaft-wound motors, decoupling the gearbox from the drive train during low speed operations. The motor also can be used for astern power, allowing for quieter fixed-pitch propeller systems compared to noisier and less efficient CP propellers.
09 May 2012
GE Marine Press Release
GE Marine is to launch hybrid electric systems for military and commercial marine customers based on its LM aero-derivative gas turbines, motors and drives, to help reduce noise and improve fuel economy.
The company describes its hybrid system as cross-connecting the ship service power system with the propulsion system by placing an electric motor and its associated motor drive in the drive train. At lower speeds, the propulsion engines can be turned off and the electric motors provide cruising power.
“Many ship owners and builders are currently evaluating hybrid electric propulsion designs for existing or new build ships. Thanks to many years in this industry forming key partnerships, GE can now offer more comprehensive hybrid electric propulsion solutions for military and commercial customers,” said Brien Bolsinger, general manager, GE Marine, Evendale, Ohio.
GE says it has already provided components on seven gas turbine hybrid or electric powered ship classes in service or under construction, including the US Navy’s LHD 8 USS Makin Island, the German Navy’s F124 and F125 frigates, and the Italian and French FREMM frigates.
The following benefits are claimed for hybrid electric propulsion:
Improved fuel economy;
Fewer installed prime movers for reduced propulsion costs;
Reduced diesel maintenance costs;
Flexible, integrated power and propulsion systems to direct power as needed;
Improved combat capability.
Traditional COmbined Diesel Or Gas turbine (CODOG) or COmbined Diesel And Gas turbine (CODAG) frigates have two gas turbines and two diesels for propulsion and typically four diesels for ship service power. With GE’s hybrid electric arrangement, the two propulsion diesels can be eliminated and replaced by electric motors. This arrangement can reduce ship construction, propulsion equipment, and maintenance costs while helping reduce noise and improve combat capabilities.
GE’s LM2500 gas turbines, for instance, can be applied in a dual gas turbine hybrid arrangement versus a single gas turbine configuration to provide the lowest technical, cost, schedule and operational risk. If incorporated into an existing LM2500 CODOG ship design, GE believes a dual gas turbine configuration requires the fewest ship modifications. GE’s dual gas turbine system configuration has two completely independent shaft lines to provide significant redundancy and survivability.
Gas turbine hybrid electric systems provide low noise when cruising on the electric motors. Low noise, hybrid systems can use shaft-wound motors, decoupling the gearbox from the drive train during low speed operations. The motor also can be used for astern power, allowing for quieter fixed-pitch propeller systems compared to noisier and less efficient CP propellers.