NYK orders ‘green’ LNG turbine ship

02 Mar 2011
MHI’s turbine-powered ‘Eco-ship’ LNG carrier concept design has been ordered by NYK

MHI’s turbine-powered ‘Eco-ship’ LNG carrier concept design has been ordered by NYK

Mitsubishi Heavy Industries (MHI) has received an order from Nippon Yusen Kabushiki Kaisha (NYK) for a LNG carrier capable of marked reductions in fuel consumption.

MHI says the ship  is the first of its kind to adopt MHI’s ultra steam turbine (UST), which it describes as a new turbine plant offering about 15% higher fuel efficiency than conventional steam turbine plants, which it achieves through efficient use of thermal energy by reheating the steam. The LNG carrier is scheduled for completion and delivery in 2014.

The Eco-LNG carrier, of about 123,000gt, will measure 288m length oa, 49m in breadth and 26.8m in depth. LNG capacity will be 145,400m3 in four Moss type spherical storage tanks. Other environmentally friendly design features include a ballast water treatment system and capability to use low sulphur fuel oil.

MHI’s UST adopts a medium-pressure turbine, in addition to high- and low-pressure turbines. Steam exiting the high-pressure turbine is returned to the boiler and reheated for driving the medium-pressure turbine, and subsequently the low-pressure turbine. The company says that it has developed this technology in response to IMO emission limits and market demands for reduced CO2 emissions, to provide a solution for ships in frequent service and requiring stable operation. Against this background, MHI will continue to develop its ‘Eco-ships’ concepts and technologies.

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