Abstract

The traffic volumes in arctic waters are expected to grow rapidly in thenear future. New fleets of oil and LNG carriers as well as ice classeddrillships and offshore supply vessels and icebreakers with high ice-class areneeded for the transportation and oil exploration. The recent growth inactivities in the Arctic region has materialized in several projects, whereAzipod propulsion system is playing an important role in making the projectstechnically possible and economically feasible. Azipod propulsion offers a veryattractive and efficient propulsion solution for most of these vessels. However, there is an evident need for azimuthing propulsion units with power inexcess of 15 MW with highest ice classes, such as the " new" IACS PC1.

In response to the market demand ABB Marine has recently developed an Azipodpropulsion concept with high power to meet the requirements of the high arcticice classes.

This paper will outline some important design considerations during thedevelopment work, such as:

  • different ice class rule requirements

  • need for overload / overtorque capacity of the electric propulsion motor inice

  • utilisation of measurements from full-scale ice trials with poddedpropulsion

High power Azipod propulsion systems help the shipowners to accessopportunities in the Arctic areas by providing safe and reliable operation inthe region. With ABB electric propulsion and Azipod units, the shipowner getsequipment designed to meet the demanding Arctic requirements and which isproven to be reliable in ensuring safe navigation in the sensitive Arcticseas.

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