SVITZER’s first environmentally friendly ECOtugs are here. The ECOtug is modeled on the renowned M-class where all
components of the M-class have been analysed and optimised in order to make the ECOtugs as eco-efficient as
possible. Applying the latest technology to minimise fuel consumption and emissions without compromising the high
level of performance has been key here for SVITZER.
The ECOtug is the world’s first IMO Tier 3 tug and is made for clients and harbours looking for an environmentally
friendly solution. We will continue to develop environmentally friendly tugs and are already in the process of
developing the next generation of the ECOtug.
International research shows that medium-speed engines are most efficient when they operate at around
80-85 percent of their capacity, so the goal was to make the engines work as close to 80 percent as
possible at all times during operation. The ECOtug’s three-part engine is designed with this in mind.
“When we don’t need full power, we only run on the necessary engine or engines. When we need more, we
simply activate more. That way, we can stay close to the engine’s most efficient load zone at all times –
regardless of what tasks we are solving. And that makes all the difference.”
Esben H. Grundtvig, Head of Group New Building.
The SVITZER ECOtugs are an industry revolution and an important step in SVITZER’s continuous efforts to
minimise emissions. The ECOtugs feature both diesel-electric propulsion and fully electrical winches. In
order to save fuel without compromising a high level of performance, three smaller engines make it
possible to run the ECOtug at maximum efficiency at all times. The result is a 10 % CO2
reduction and up to 80 % NOX reduction, thereby meeting IMO Tier 3 requirements well before
they come into effect in 2016.
This is only the first but very important step in SVITZER’s effort to minimise emissions while at the
same time providing environmental and economical advantages for our clients.
To SVITZER, eco-efficiency is an aspiration to go beyond legislative compliance and at the
same time achieve a competitive advantage. To reach that level, we have been systematically identifying
potentials for a more efficient use of resources, thereby lowering total emissions and optimising costs.
Since 2009 the SVITZER Group’s overall CO2 emissions per tug job have been reduced by 1 %
each year, thereby reaching our target for 2009-2012.
When discussing emissions, there are two categories to consider: one that pollutes the environment
(SOX, NOX and PM) and one that affects the climate (CO2). Reduction of
CO2 is only achievable through the reduction of fuel consumption, as the burning of fossil
fuels creates CO2.
Sulphur oxides (SOX)
The most effective way of reducing sulphur oxide emissions from the fuel combustion is to use fuel with
low sulphur contents. Low-sulphur fuel is used throughout our towage operations.
Nitrogen oxides (NOX)
Nitrogen oxides are byproducts of the combustion process. The most common way of reducing them is by
fitting a catalyst that converts NOX into nitrogen and water by adding ammonia. SCR’s
(Selective Catalyst Reaction) are an integral part of the ECOtug in order to meet the IMO Tier 3
Particulate matter (PM)
Particulate matter comes from the fuel combustion. The SCR of the ECOtug’s middle engine is integrated
with an additional particulate filter property to further reduce PM emissions.