On September 2, the latest 5 sets of 35m folding marine rotor sails built for Anemoi Marine Technologies (Anemoi) by Chengxi Shipyard under China State Shipbuilding Corporation (CSSC) were successfully delivered.
It is reported Brazilian mining firm Vale will install these five rotor sails on the world’s largest ore carrier – 400,000 DWT Valemax “Sohar Max”, which will form the world’s largest wind rotor propulsion system, marking another major breakthrough for CSSC Chengxi in the field of deep plowing into the field of energy saving and emission reduction of green ships and attacking the construction of rotor sails. The vessel is owned by Omani shipowner, Asyad.
It is the second batch of folding rotor sails developed by CSSC Chengxi Shipyard for Anemoi in batch. Compared with the same type of product, the overall weight of the steel structure components has been reduced by 30%.
This rotor sail has advanced hydraulic folding and automatic adjustment system; the rotor sail has a diameter cylindrical of 5 meters, the top has a diameter of 9 meters and the overall height reaches 38 meters, and the total tonnage reaches 135 tons; With a maximum design speed of 200 rpm and a tipping angle of up to 89°, close to horizontal, it effectively mitigates the impact on airflow and cargo handling operations.
Compared with the rotor sails previously installed on the 325,000 DWT Guaibamax, this wind rotor propulsion system delivered this time doubles the wind area. According to Anemoi’s estimation, after the installation of rotor sails on Sohar Max, the annual energy saving effect is expected to reach 6%, which is equivalent to the reduction of 3,000 tons of CO2-equivalent emissions, and the effect of energy saving and emission reduction is remarkable.
According to statistics, up to now, CSSC Chengxi has built 21 sets of marine rotor sails, and many sets of optimized and improved new rotor sails are being installed and commissioned in a tight schedule.
