World's First Hybrid Ferries Equipped with Voith Schneider Propeller

In summer 2013, the world’s first two ferries with a hybrid propulsion system will be put into service. Owned by CMAL, they are being built by Ferguson Shipbuilders in Glasgow. Each of the hybrid vessels will be equipped with two Voith Schneider Propellers (VSP) with an input power of 375 kW per propeller. With its hybrid concept, the shipyard aims to reduce the ferry’s CO2 emissions by up to 20 percent.

The vessels will be the first of their kind to combine a diesel-electric propulsion system with lithium ion battery technology. The ferries will operate on various routes in the Scottish waters, which are characterized by strong currents and heavy winds. Both double-ended ferries are powered by two Voith Schneider Propellers each, which support the environmentally-friendly ferry concept with their high degree of efficiency and low draft. In addition, they provide the vessels with excellent performance characteristics and safe maneuvering even under the most difficult operating conditions.

To take load off the diesel engine temporarily, the two lithium ion battery banks of each ferry are charged overnight from the grid. The hybrid propulsion system reduces the ferry’s fuel consumption and thus her CO2 emissions with an ambitious aim: an emission reduction of up to 20 percent. Apart from the economic benefits, the hybrid propulsion system leads to a significant reduction in mechanical stress and noise, in particular when entering and leaving ports.

Ferries are generally designed and built for the specific operating scenario in question, with the port infrastructure kept in mind. The new hybrid ferries are to be used on various routes in the Scottish waters to transport approx. 150 passengers and 23 cars per ferry with a service speed of approx. 9 knots. Many Scottish ferry landing areas consist of concrete ramps. The ferries dock without being moored tightly. Accurate control and positioning as well as the high maneuverability are essential for docking in rough seas. To ensure that the two type 16R5 EC/90-1 VSPs are well protected during docking maneuvers, the propellers are arranged diagonally in recesses and not in central positions at the front and aft, as is otherwise the case.

Voith Turbo, the specialist for hydrodynamic drive, coupling and braking systems for road, rail and industrial applications, as well as for ship propulsion systems, is a Group Division of Voith GmbH Voith sets standards in the markets energy, oil & gas, paper, raw materials and transportation & automotive. Founded in 1867, Voith employs more than 40 000 people, generates € 5.6 billion in sales, operates in over 50 countries around the world and is today one of the biggest family-owned companies in Europe.

Source: voithturbo, March 20, 2012

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Posted on March 20, 2012

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