Nippon Yusen Kabushiki Kaisha (NYK), MTI, and Japan Marine United Corporation (JMU) have announced the development of a highly efficient propeller that claims to achieve a 1.2% reduction CO2 emissions and fuel consumption.
The new propeller was designed and developed by analysing the conditions of a vessel’s propeller in actual operation. Observation of cavitation and flow velocity measurements around the propeller were taken to assess where excess cavitation occurred on the propeller blade, which leads to ship vibration and erosion of the propeller.
The three companies involved in the design and engineering of the propeller believed that close monitoring of a propeller in operation would enable them to reduce a ship’s environmental load and design an optimal propeller shape based on the results.
The results confirmed that simulation data matched actual conditions with a high probability. The simulation was then used to optimise the propeller design to generate maximum fuel efficiency.
The new propeller is due for delivery in 2019 and will be installed on two newbuild containerships.