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SCHOTTEL HYBRID DRIVE FOR SEMBCORP LNG HYBRID TUGS

SCHOTTEL HYBRID DRIVE FOR SEMBCORP LNG HYBRID TUGS

Tuesday, April 13, 2021 

Singapore-based Sembcorp Marine has contracted the Schottel azimuthing hybrid drive system Sydrive-E for what it believes is the first LNG hybrid tug.

Sembcorp Marine is building a fleet of 12 hybrid LNG-fuelled tugs to replace its existing diesel-powered vessels. The new tug design is by naval architect LMG Marin, a wholly owned subsidiary of Sembcorp Marine subsidiary, based in Bergen, Norway, and which specialises in energy efficient solutions.

The tug’s future operation profile in the harbours of Singapore will demand highly variable power ranges. Depending on the desired operating mode and the required propulsion power, the hybrid drive system activates the appropriate power source or both together. The LNG-fuelled main engines and the electrical motors are both coupled to the Sydrive system and are arranged to always operate efficiently within their optimal load ranges, thereby reducing fuel consumption and emissions, supporting Sembcorp Marine’s efforts in environmental protection.

In terms of thruster integration, each upper gearbox offers two power input positions with an offset angle of ±90° for two power sources. An option with a ±135° offset angle is available, allowing greater design flexibility.

Sembcorp Marine’s hybridised Schottel SRP 430 RudderPropellers will have a power intake capacity of about 2,000kW each, which will be fed by zero emission electrical motors and/or low-emission LNG main engines. The 360° steerable SRPs combine maximum manoeuvrability and a high bollard pull as harbour operations require. 

The Schottel Sydrive-E azimuth thrusters are engineered and manufactured in Germany. Commissioning and After Sales Service will be provided by Schottel Far East, in Singapore. Sembcorp Marine’s hybridised fleet will be operated by its subsidiary Jurong Marine Services for services in Singapore’s harbours with operations scheduled to start in late 2021.

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