Wärtsilä will supply its EnergoFlow and EnergoProFin solutions for 10 Bird Class oil and chemical tankers owned by Singapore head-quartered global tanker operator Hafnia.
The combination of the two Wärtsilä systems is designed to provide an optimised waterflow over and after the propeller, thereby improving propulsion efficiency considerably.
EnergoFlow is a pre-swirl stator that creates an optimal inflow for the propeller, reducing fuel consumption and emissions in all operating conditions. The EnergoProFin is an energy saving propeller cap with fins that rotate together with the propeller. It reduces the energy losses created by the propeller hub vortex, increasing overall propulsion efficiency and reducing underwater noise.
By improving the vessels’ fuel efficiency, emissions are reduced, operating costs are lowered, and both the CII rating and EEXI values are improved.
Ralph Juhl, EVP Technical Director, Hafnia said: “There are many benefits to be gained by improving the operating efficiency of our vessels’ propulsion systems and we look forward to having these innovative Wärtsilä solutions installed. At Hafnia we are working hard to decarbonise our operations and these retrofitted solutions will support this commitment.”
Francois Emin, Product Manager Propulsion, Wärtsilä said: “Wärtsilä’s OPTI Design methodology takes advantage of computational fluid dynamics along with our extensive in-house know-how. The EnergoProFin propeller cap and EnergoFlow pre-swirl stator work together to deliver meaningful fuel savings and better environmental performance, which are key ambitions for today’s leading operators.”
The Wärtsilä equipment is scheduled to be delivered commencing in 2024. The project will be carried out over a two-year period for the 10 vessels.
