Anemoi Marine Technologies, in collaboration with Guangzhou Shipyard International (GSI) and tanker operator Hafnia, has successfully completed a project aimed at integrating Rotor Sail wind propulsion systems into medium-range (MR) tankers. The design has received Approval in Principle (AiP) from the classification society DNV, providing a verified framework for shipowners to install wind-assisted propulsion in this segment.
The project focuses on incorporating two folding, explosion-rated Rotor Sails, measuring 5 by 35 meters, into the MR tanker design. These sails meet safety requirements for hazardous areas on tanker decks, addressing challenges related to deck space and cargo handling. Additionally, a lightweight deck seat was developed to facilitate inspection and maintenance without the need for underdeck reinforcement.
DNV’s review included the Rotor Sails’ compliance with the International Maritime Organization’s Energy Efficiency Design Index (EEDI) and Energy Efficiency Existing Ship Index (EEXI) frameworks, confirming the design’s energy efficiency potential. Nick Contopoulos, Chief Production and Partnerships Officer at Anemoi, highlighted the project’s significance, noting that it offers a practical pathway for adopting wind-assisted propulsion in the tanker sector with minimal structural impact.
