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Volvo Penta’s IMO Tier III Solution



Volvo Pentas IMO Tier III Solution

With 114 journeys every day, the Svanhild ferry has a heavy workload in transporting passengers and cars between two Swedish islands. The roll-on roll-off (Ro-Ro) vessel makes 57 return trips between the islands of Lilla Varholmen and Bjorko, west of Gothenburg. Each journey on the 900m route takes around five minutes, but with such a busy schedule, time is of the essence. Yet efficiency is not the only mark of the ferrys success; as the company is a division of the governments Swedish Transport Administration, sustainability is also valued. As such, Trafikverket Färjerederiet has been field-testing Volvo Pentas IMO Tier III engine package, to see whether a reduction in emissions is compatible with the required performance.

We chose to test Volvo Pentas IMO Tier III solution because our vision is to operate a service that is as environmentally-friendly as possible,says Mikael Olofsson, the Svanhilds skipper for Trafikverket Färjerederiet. We have been carrying out testing for a year and it has been great.

A 24-hour per day operation
Trafikverket Färjerederiet operates a number of routes throughout Sweden. The 213ft (65m) Svanhild ferry on the Bjorkoledenroute runs 24 hours per day, making journeys every 10-20 minutes during peak hours, for commuters and sightseers. It has a capacity of 40 cars and 197 passengers. With an engine room at each end of the vessel, the ferry is able to travel easily between the two ports without having to turn around.

It previously used four engines two in each engine room and was equipped with Volvo Pentas 12-liter TAMD 122A models providing 203kW at 1800rpm. The Svanhild ferry now uses only one 13-liter unit in each engine room, and is installed with Volvo Pentas D13MH models that provide 441kW at 1900rpm. The D13MH engines in the ferry use a 360-degree gearbox and are also both equipped with a selective catalytic reduction (SCR) unit to reduce emissions for forthcoming IMO Tier III regulations.

It is good for us to require less maintenance with fewer engines, and reduced fuel consumption and minimal exhaust emissions,says Olofsson. He adds: The co-operation weve had with Volvo Penta is very good, so we are very happy so far.

Maximizing emissions reduction
Volvo Pentas D13MH model is an in-line 6-cylinder diesel engine that uses a high-pressure unit injector system, overhead camshaft, a twin-entry turbo with a water-cooled exhaust manifold, and miller valve timing. This contributes to world-class fuel efficiency and excellent operating economy, combined with very low emissions.

As IMO Tier III regulations in the North and Baltic seas will come into force in 2021, requiring a reduction NOx (nitrogen oxides) emissions by around 70 per cent, Volvo Pentas engine solution uses an SCR unit with two alternative exhaust outlets and a separate UREA injector pipe, for flexible and compact installation. The engine package surpasses regulations by reducing emissions by up to 75 per cent.

Additional benefits of Volvo Pentas IMO Tier III solution:

    Optimized for sulfur fuel up to 1000 ppm.
    Ability to use either 32% or 40% urea.
    SCR acts a silencer to reduce noise by up to 35 dBA.
    6-inch robust bolt flanges.
    Twin 6-inch outlets.

In using more powerful engines than previously on the Svanhild ferry, Trafikverket Färjerederiet has made a great choice with our D13MH models,says Aniko Holm, manager for marine field tests at Volvo Penta. These two 13-liter engines give them all the power they need to run the ferry smoothly and efficiently, but with half the requirements for servicing and maintenance. And in using our IMO Tier III package, the ferry company is maximizing the reduction of emissions, well ahead of 2021 deadline.



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