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SHIPBUILDING & EQUIPMENT | GREEN SHIP TECHNOLOGY
The E-Ship 1 is 130m long and equipped with four rotor sails Photo: Chrisostomos Fountis
Innovative new cargo ship
adds thrust with rotor sails
ENERCON Aiming for both sustainable and effi cient transport, the German wind-turbine manufacturer
Enercon recently put the E-Ship 1 into service to deliver its products to wind parks
around the world. The innovative cargo vessel uses rotor sails to harness wind energy, which
supplements the power provided by the diesel-electric propulsion system. This, along with
other effi ciency-enhancing features, makes operation of the E-Ship 1 especially economical and
environmentally friendly.
In 2006 Enercon placed an order at Kiel’s
Lindenau shipyard for the E-Ship 1,
whose construction was completed last
year at the Cassens shipyard in Emden,
northern Germany. The vessel’s design
makes use of cutting-edge technologies,
above all a hybrid propulsion system consisting
of diesel engines and rotor sails
(vertical rotating cylinders). This brings
fuel savings of up to 50%, enabling Enercon
to deliver its wind turbines to customers
in Europe and overseas in an economical
as well as environmentally friendly
way. Originally meant only to identify the
newbuilding project, E-Ship 1 caught on
and has been the offi cial name of the ship
since it began operations in August 2010.
Technical specifications
Classifi ed by Germanischer Lloyd, the
E-Ship 1 (class notation: �100 A 5 E3 with
freeboard 2010m, Multi-Purpose Dry Cargo
Ship IW NAV-OC BWM SOLAS II-2, Reg.19
16 Ship & Offshore | 2011 | N o 1
C2P49, environmental passport, equipped
for the carriage of containers, equipped for
carriage of ro-ro cargo, strengthened for
heavy cargo, �MC E3 AUT RCP 46/100
RP 1-40%) has a length of 130m, width of
22.5m and tonnage of 10,200dwt. Its hull
is streamlined to minimise drag below the
waterline as well as to optimise aerodynamic
conditions around the rotor sails.
Enercon engineers also took care when designing
the propeller and rudders to realise
further fuel-saving potential by making
their interplay hydrodynamically ideal.
To provide the best possible manoeuvrability,
the E-Ship 1 has three rudders with a
total surface area of approximately 60m².
The four rotor sails, two fore and two aft,
are positioned in the corners of the main
deck. The aft rotors fl ank a free-fall lifeboat.
Between the fore rotors are the fairing-encased
outlets of the main engines’
nine exhaust pipes and the engine-room
ventilator.
The E-Ship 1 also has an innovative wastewater
system, specially developed for the
vessel, which Enercon says discharges far
fewer pollutants than current international
limits allow. To prevent serious environmental
damage in case of an accident at
sea, all tanks containing fuel and lubricants
are protected by a double hull.
The cargo ship can accommodate up to 22
people.
Flexible cargo capacity
Being a RoLo (roll-on lift-off) vessel,
E-Ship 1 can handle both wheeled cargo
and conventional cargo loaded and unloaded
by crane. It was tailor-made for
the transport of Enercon’s wind-turbine
components. A tweendecker, the vessel
has three holds able to take on as many
as 20 wind turbines with an output of
2MW. The volume of the cargo bay is
about 22,000m³ with a stacking capacity
of 18t/m 2 on the tank deck. The �