Monday, August 5, 2019

New Design of LNG Powered Class of Ore Carrier Approved as Sulphur Cap Approaches

Japanese Groups Strive for More Efficiency and Lower Emissions
Shipping News Feature
JAPAN – WORLDWIDE – With the International Maritime Organization's mandatory sulphur cap fast approaching, liquefied natural gas (LNG) is rapidly being adopted as an alternative fuel to the familiar heavy oil which traditionally powers every large vessel class, from container ships to bulk carriers and tankers of every type. Now K Line and Namura Shipbuilding say they have joint approval in principle from DNV GL for a new concept design.

The vessel is an LNG fuelled Ore Carrier, a second generation WOZMAX® class, the ridiculously titled vessel type christened by NYK over a decade ago and trademarked to Namura, the acronym derived from Western Australia, a precis of the slang term for that country, and of course, the largest size vessel able to load ore from the region. The new ship however is not one to be ridiculed, the brief being to manage to retain almost identical dwt and service speed as the class parameters, with sufficient endurance to round-trip between Singapore and Brazil in gas fuel mode utilising gas tanks situated in the central hull area.

Also required was for the vessel to stay within the parameters of the Energy Efficiency Design Index (EEDI) 3, that is achieve a 30% reduction in CO2 emissions compared with ships built between 1999 and 2008. Further studies were made to investigate the possibility of combining the LNG powered system with a shaft generator, a binary cycle power generation system and lithium batteries so as to further reduce CO2 output, which tests confirmed that this system can achieve an additional further 4% reduction of fuel oil consumption.

K Line says this is just part of its continuous attempts to attain greater efficiency in its operations as well as further reduction of emissions and environmental pollutants in accordance with the company’s K Line Environmental Vision 2050 programme. The new design records a length just shy of 330 metres with a 57 metre beam. The dwt is circa 250,000 with a service speed of 14.3 knots.