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SCHOTTEL: Azimuthal Hybrid Drive system SYDRIVE-E for the worlds first LNG hybrid tug

Singapore-based Sembcorp Marine relies on SCHOTTELs azimuthal hybrid drive system SYDRIVE-E for the worlds first liquefied natural gas (LNG) hybrid tug. With this first in a series of 12 vessels, Sembcorp Marine will build the worlds first hybrid LNG-fueled tug fleet that will replace its existing diesel-powered tugs. The vessel is designed by LMG Marin, a wholly owned Sembcorp Marine subsidiary, and a leading naval architecture design house in Bergen, Norway, which provides energy efficient solutions.

Hybrid drive system SYDRIVE-E supports Sembcorp Marines environmental protection efforts
The tugs 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-fueled main engines and the electrical motors are both coupled to the SYDRIVE system and always operate efficiently within their optimal load ranges, thereby reducing fuel consumption and emissions and supporting Sembcorp Marines 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 also available allowing even more design flexibility.

Azimuth thrusters for powerful manoeuvrability
Sembcorp Marines hybridized SCHOTTEL RudderPropellers type SRP 430 will have a power intake capacity of about 2,000 kW each which will be fed by zero emissions electrical motors and/or low-emissions LNG main engines. The 360-degree 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, Singapore. Sembcorp Marines hybridized fleet will be operated by its subsidiary Jurong Marine Services for services in Singapores harbours with operations scheduled to start in late 2021.



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