Tag: ship propulsion

Marine propulsion systems are reducing CO2 emissions and enable greater fuel savings Italian shipyard Cantieri Navali Megaride has proven that diesel-electric systems are suitable not only for large merchant and naval vessels but also small ships.It recently commissioned Siemens Marine Solutions to equip a 65m RINA class offshore supply vessel (OSV) which was designed by Errenavi, Rome, for the Italian coast guard and features a Siemens Siship EcoProp hybrid propulsion system.Working in close cooperation with ZF Marine, its preferred gearbox supplier, Siemens ensured delivery of a total hybrid propulsion solution tailored to the needs of the customer. This included a ZF 9300 PTI 'hybrid-ready' transmission and two Siemens electric motors (180 kW at 3,000 rpm) matched to two CAT 3512 C diesels (1,765 kW at 1,800 rpm). The speed of the vessel using diesel mode is approximately 12 knots and 8 knots in electric mode.For this project the ZF 9300 PTI 'spur gear' version was used, which acts as a ratio multiplier, keeping the footprint of the transmission small and allowing a wide range of ratios for each transmission. The system has no boost function and no battery driven propulsion mode. Propulsion modes are diesel only, directly through the transmission, ...