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ENERGY-SAVING MECHANICAL PROPULSION FROM SCHOTTEL FOR BRAZILIAN TUGS

ENERGY-SAVING MECHANICAL PROPULSION FROM SCHOTTEL FOR BRAZILIAN TUGS

Thursday, August 26, 2021 

To help reach the IMO 2030 climate goals, Brazilian towage group Starnav has contracted Detroit shipyard in Itaja, Brazil, to equip four newly built tugs with Schottel RudderPropellers, with one of the 32m long escort tugs featuring the Schottel patented Sydrive-M technology from the start, and the other three configured to be Sydrive-ready.

Schottel believes that the Sydrive M mechanical hybrid solution avoids the complexity of common hybrid technology, to ensure lower maintenance costs and reduced fuel consumption. The Sydrive-M will enable Starnav to offer more profitable and emission-reduced towing services in Brazilian ports. B

Carlos Eduardo Pereira, CEO Starnav Serviços Marítimos, said: “By making use of Schottel hybrid solution, we are taking the initiative to increasingly seek a clean operation. Starting now is particularly important: the vessels that are built today will be in the water for decades to come. Our focus has always been the high level of reliability in the equipment, mainly safety and environment care. With 34 vessels propelled by Schottel in our fleet, we will continue expanding our operations and benefit from a strong partner with extensive know-how in Brazil.”

The main propulsion of each ASD tug consists of two diesel-driven 2.525kW Schottel SRP 490 RudderPropellers with 2.8m diameter FP propellers. With this configuration, they will achieve more than 80t bollard pull and a maximum speed of 12.5 knots. The first of the four tugs is scheduled to enter service in 2022.

Schottel Sydrive-M connects a port and starboard mounted azimuth thruster in one vessel, allowing the thrusters to be driven together by only one of the main engines. In turn, this leads to reduced operating hours of the main engines, resulting in lower maintenance costs as well as reduced fuel consumption and lower emissions. The system needs no additional electronical components, which Schottel says offers advantages in its three main operating modes: Light Operation or Free Sailing Mode, Full Thrust Operation Mode and FiFi-Mode.

The IMO strategy on GHG reduction challenges all stakeholders in the maritime industry to find, develop and integrate new and more energy-efficient solutions, to meet GHG emission reduction goals for 2030 and 2050. A set of toolkits, such as the Ship Emissions Toolkit and the Port Emissions Toolkit, provide practical guidance on assessing emissions from and identifying emissions reduction opportunities for the fleet. By investing in innovative hybrid concepts and offering greener operations, ship owners like Starnav can contribute to achieving these goals.

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