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SHIPBUILDING & EQUIPMENT | GREEN SHIP TECHNOLOGY
Developments for a
sustainable shipping industry
INITIATIVE “Green Ship of the Future” is a Danish untraditional joint-cooperative forum with a
vision of demonstrating and developing environmentally friendly and energy effi cient
technologies for reduction of emissions and air pollution arising from the activities of the
shipping industry
Magnus Gary, Christian Schack
The 35,000 dwt ‘low emission’ bulk carrier was optimised with many different technologies
Global shipping amounts
to about 3% of the total
CO 2 emissions. Even
though arguments can be
made regarding effi ciency and
the number of TEU and DWT
moved by ships compared to
other possibilities, it is still
important to recognise the obligation
of reducing the harmful
emissions from shipping to
a minimum. In 2008, “Green
Ship of the Future” was initiated
as an initiative focused on
using available technology to
reduce emissions.
Initially, “Green Ship of the
Future” consisted of four companies,
Aalborg Industries, A.P.
Moller-Maersk, MAN Diesel
and Odense Steel Shipyard, who
went together with the primary
objective of developing and demonstrating
green technologies
within shipping and shipbuilding.
The focus of the group was
on developing solutions based
on what was technically possible
instead of basing the development
solely on the demands of
shipowners and shipyards.
10 Ship & Offshore | 2011 | N o 1
Together with the environmentally
friendly objective,
this bottom-up approach appealed
to many levels within
the maritime world, and soon
more than 15 partners had
joined the initiative. This led
to a more formalised partnership,
and the group of companies
decided on performing a
so-called ‘low emission’ study
on a 8,000 TEU container vessel
and a 35,000 dwt handysize
bulk carrier where the results
from the individual projects
were accumulated with respect
to interdependent interference
and compared with an
estimate of the extra cost of
implementation of the green
technologies.
Methods and results
A key area in the ‘low emission’
studies was the use of
already available ‘green’ technologies
and the ability to
discuss possibilities in a forum
of technically gifted persons.
This means that the projects in
“Green Ship of the Future” are
created through people sharing
thoughts and ideas of how
to bring existing technologies
as close to their effi ciency optimum
as possible – and doing
so from a holistic point of
view, meaning that the project
partners had to create synergism
in their projects in order
to reach the full potential.
The advantage of using already
available technologies was that
it would be possible to build
the ships as specifi ed and documented
by the two task-leading
companies of the concept studies,
Odense Steel Shipyard and
Grontmij | Carl Bro. This was
important as the practical approach
in “Green Ship of the
Future” would coincide very
poorly with the development
of products that could not be
implemented.
The two initial ‘low emission’
studies consisted of many different
projects comprising a
wide range of issues from A.P.
Moller-Maersk and MAN Diesel
performing evaluation of the effects
of auto-tuning of the main
engine to FORCE Technology
and Hempel’s tests on the effi
ciency of Hempel’s fouling
release coating system, HEMP-
ASIL X3, or GreenSteam and DS
Norden’s project where it was
proven that the use of dynamic
trim optimisation would lead to
energy savings of up to 4%.
The overall aim of the studies
was to demonstrate that it was
possible to reduce emissions
from the two types of vessels
by 30% on CO 2 , 90% on SOx
and 90% on NOx. The ‘low
emission’ studies of the bulk
carrier and the container vessel
showed that it was possible to
save up to 7.2% on CO 2 , 79.1%
on SOx and 98.6% on NOx regarding
the 35,000 dwt handysize
bulk carrier and 14% on
CO 2 , 90% on SOx and 80% on
NOx on the 8,000 TEU container
vessel without lowering
the speed or changing main parameters
of the vessels. While
the target was reached for NOx
and SOx, initiatives are still required
to meet the 30% reduction
of CO 2 .