Buks6r 0g Berging to build world`s first LNG tugs

I
ITUGS
I
THE W0RLD'S
TOWTNG
F0f the l.rtest ne\'^/s
|IRSI tNc powered
escoft tugs have been ordered by
Norwegian company Bukser og
mafitimejournal.rom
Buks6r 0g Berging to build world's first LNG tugs
Befging AS.
They will f ulfil the towage contract
recently announced by the oil and gas
company Statoil ASA, Io serve the
Karsto gas processing plant on behalf
of operator Gassco (MJ - towlines
January 2012).
Sanmar Denizcilik AS has been
entfusted with the construction of the
new vessels in their new yard in Tuzla
Bay, lstanbul,
with delivery scheduled
for late in 2013.
Ihe tugs have been designed
in
house by Buksdr og Berging, in
cooperation with Marin Design AS of
Kolvareid, Norway. Ploject partners
Rolls-Royce Marine (Norway) have
signed a contract to deliver highly
elficient engines and propulsion
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The project was developed in
close contact with Rolls-Royce,
The Bukser og Bergn ng LNG fuelled tugs wilL be the f
nt
in the world
giving them a unique opportunity
to understand and adhere to the
gas system, and one AGA Cryo LNc
stepless ramp up time from 0 to 1000/0
operational requifements.
tank with an
load, and are easy to service and
Rolls-Royce
will supply two Befgen
C6 lng engrnes,
two Aquamaster
LNG system based on
two coldboxes.
maintain.
The Bergen gas fuelled engines
. Compliant with Tier lll regulations
Buksdr og Berging AS commercial
director Vetle Sverdrup said, "We
The LNG system is designed by
US35 pfopulsion units, RR Acon control
can operate on low load without any
AGA Cryo and integrated
and monitoring equipment for the
festriction, have a very quick and
Rolls-Royce propulsion system. This
with the
wanted to base the design of the new
tugs on the spark ignition lean burn
engine concept, with the ability to
single tank LNG system has full gas
accommodate direct drive in addition
redundancy approved by NMD
to a low emission profile. The
(Norwegian Maritime Directorate)
propulsion system on high
ie; no diesel back up is required.
performance escort tugs needs to
The fuel system is designed for
accommodate rapid load pick up over
weekly bunkering to be carried out by
the entife load range."
the tug crew and takes approximately
It is anticipated that the new hull
45 minutes.
and propulsion system will achieve up
The operational benefits of a gas
fuelled propulsion system are a
to 200/r highef thrust efficiency.
cleaner engine room, less waste oil
designs, and achieve a bollard pull of
and no'switch over' problems.
at least 65 tons. The tugs will have an
Environmental benefits with Spark
overall length of 38.00m, a beam of
compared to standard escort tug
lgnition gas engines incorporated in
14.50m and draft of 7.50m, with
the new design are:
. 920/o reduced NOx emission
accommodation for five persons. In
.
shiphandling, the tugs will be
170/o reduced GHG emission
. 98-100V0 feduced SOx emission
. 980/o reduced particulates
Ihis Rolls
Royce graphic shows the location of the
Bergen LNG engines, the drive lrne and LNG tank.
addition to escort duties and
equipped for fire fighting and pollution
control duties.