Wärtsilä Energopac - Wärtsilä Propulsors & Gears

EnergoPac is the optimised propulsion and manoeuvring solution for coastal and ocean going vessels. The key objective is to reduce the vessel’s fuel consumption by integrating the design of both the propeller and rudder. Each EnergoPac is designed to fit the intended vessel and to meet its specific requirements; this allows EnergoPac to be optimised fully for energy efficiency, whilst not compromising on either manoeuvrability or comfort levels. Fuel savings EnergoPac reduces fuel consumption because it effectively reduces the flow separation behind the propeller hub. Extended studies show that for the same course-keeping capabilities, EnergoPac will create less drag than conventional rudder systems. In particular, when using small – corrective – steering forces to keep the vessel on course, the difference in rudder resistance is significant. The high-lift performance of EnergoPac requires smaller steering angles and consequently reduces rudder resistance. Cost savings with EnergoPac The reduction in fuel consumption depends very much on the vessel type, its operational profile, and on the reference propeller and rudder. For any application, the power savings can be estimated by Wärtsilä. The estimate is based on the vessel design, its operational profile and other requirements. Proven savings in the power required for a vessel’s trial speed vary between 2–9% with EnergoPac.