LR Enviro Standard Employed
On LNG Newbuilds
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Lloyd's Register made three significant strides with
one announcement when last month it divulged that
Mitsubishi Heavy Industries (MHI) is applying the
Lloyd's Register (LR) Environmental Protection nota-
tion to four LNG ships under construction at its
Nagasaki yard. This news is significant for LR as it
confirms the strength of its push on the environment
and the LNG market, and is the first time this environ-
mental standard has been applied to either LNG or
Japanese built ships.
Compliance with Lloyd's Register's Environmental
Protection standard is voluntary. The notation pro-
motes a standard of environmental performance
beyond that covered by ISM and MARPOL, both in
terms of design and the on-going operation of the ship.
The first ship, Abadi, a joint venture between the
Brunei Government, Mitsubishi Corporation and Shell,
is due to be completed in June 2002. The remaining
three. Galea, Gallina and Gemmata, are scheduled for
delivery from September 2002 through to May 2004
and will all be delivered to Shell.
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LNG Breakthrough For Wartsila
Wartsila Corporation received an order to supply
four Wartsila 6L50DF dual-fuel engines to power a
75,000 cu. in. LNG carrier contracted by the French
gas holding company Gaz de France at the French
shipyard Chantiers de l'Atlantique.
Due for delivery in 2004, this newbuilding is break-
ing away from traditional practices in the propulsion of
LNG (liquefied natural gas) carriers. It will be the first
LNG carrier to be powered by electric propul-
sion, and one of few to have internal-combus-
tion engines instead of the more usual steam
turbine plant.
The four dual-fuel engined generating sets
will meet all the ship's propulsion and ship-
board electrical requirements. The Wartsila
6L50DF engines each develop 5,700 kW at
514 rpm.
This membrane-type vessel (GTT-CS1) will
be employed transporting LNG from Skikda
in Algeria to Fos near Marseilles. This round
voyage will take about one week at a service
speed of 16 knots, which can be achieved with
three of the four generating sets.
The ship is also designed for spot market
trading, such as voyages to the U.S. For such
times, the service speed can be 18.5 knots
using all four generating sets.
Compared with the alternative power plants,
the Wartsila 50DF engines have distinctive
benefits in LNG carriers. While making max-
imum use of the gas fuel (boil-off from the
cargo of liquefied natural gas) to develop use-
ful power, the high efficiency of these engines
calls for a much lower fuel consumption over-
all and thus lower operating costs than the
conventional steam turbine plant. The Wart-
sila 50DF engines also have much lower stack
emissions than a steam plant. Their low NOx
emissions are about one-tenth those of the
equivalent diesel engines. The combination of
the engines' low fuel consumption and their
maximum use of natural gas means the 50DF engines
also have low C02 emissions. The Wartsila 50DF
engines have cylinder dimensions of 500 mm bore by
580 mm piston stroke. Available in configurations with
six, eight and nine cylinders in line, and 12, 16 and 18
cylinders Vee-form, the 50DF engines develop 950 kW
per cylinder MCR at 500 or 514 rpm for 50Hz and
60Hz electricity generation, respectively.
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May, 2002
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or visit www.maritimereporterinfo.com
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