Are IMO regulations tough enough to keep national governments from imposing stricter measures?

Only partly
No--expect a slew of regional regs!

Marine Log

June 20, 2007

Converteam electric propulsion for Knutsen LNG ships

Converteam has won a contract at Daewoo Shipbuilding and Marine Engineering Co. Ltd. in Korea to supply electric power and propulsion systems for three LNG carriers for Norwegian shipowner Knutsen OAS Shipping AS.

These 173,400 cu.m LNG carriers will be Knutsen's first with electric propulsion.

They will be fitted with Converteam systems based on induction motors and PWM type MV7000 converters.

The vessels will be of twin skeg design and will each be driven by two 13.6 MW 570 rpm high torque density induction motors each fed by two dual PWM type MV7000 converters associated with an advanced digital propulsion control system.

Converteam will also supply the generators and the Main and Cargo MV switchboard. This new solution is the fruit of Converteam's extensive expertise in electric propulsion systems, electric rotating machines and power converters, and of technical advances within power electronic components such as IGBTs (Insulated Gate Bipolar Transistors).

It is claimed to significantly increase propulsion performance and to offer better availability, higher efficiency and reduced operational and maintenance costs.

Earlier this year, Norwegian Cruise Lines and Aker Yards selected this same technology for two cruise liners (each 2 x 24MW at 130 rpm).

The first vessel (hull no 2267) is scheduled to be delivered to Knutsen OAS Shipping AS on April 15th, 2010, and the others will follow later that year.