Page 3rd Cover: of Maritime Reporter Magazine (May 2002)

LR Enviro Standard Employed

On LNG Newbuilds m j am

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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Circle 278 on Reader Service Card or visit www.maritimereporterinfo.com

May, 2002

Circle 216 on Reader Service Card or visit www.maritimereporterinfo.com 29

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