Wärtsilä, Japanese ship builder Oshima Shipbuilding, and DNV GL have delivered the first results of their joint industry development project. During Nor-Shipping, the project partners announced a next-generation 62,000 dwt Ultramax Bulk Carrier design that is optimised, and that will meet upcoming emissions legislation.
The design showcased that emission levels from conventional merchant vessels can be significantly cut, complying with IMO targets.
The project goals included the achievement of low emission levels, both at sea and in port, compliance with IMO’s requirements to decrease CO2 emissions per ship’s capacity-mile by at least 40% by 2030, and zero emissions during waiting time.
The project also aims to establish a new standard that enhances the return on investment (ROI) for the owner. Another key objective was to limit GHG emissions through the application of currently available technologies.
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The design is based on actual operating profile data from Ultramax bulk carriers and it incorporates an LNG-fueled Wärtsilä 31DF dual-fuel main engine connected to a power take out (PTO) shaft generator and controllable pitch propeller (CPP). According to Stein Thorsager, Director, Merchant and Gas Carrier, Wärtsilä Marine, the result out-performs all current designs in terms of efficiency and sustainability.
Greater efficiency and better environmental performance has been made possible through collaboration with Wärtsilä and DNV GL … It represents a future proof solution that will enable bulk carrier owners to comply with legislation while also lowering operating costs
mentioned Eiichi Hiraga, President at Oshima Shipbuilding.
What is more, the high efficiency of the propulsion solution reduces the EEDI by 50% in comparison to standard ships of this size and type. The EEDI provides a specific figure for an individual ship design, expressed in grams of carbon dioxide (CO2) per ship’s capacity-mile.
Other benefits include the capability to operate in an environmental mode while being in port through the main use of solar panels, the installation of an LNG tank that is dimensioned according to the capacity needed for the operating profiles and the availability of LNG bunkering infrastructure.
The project also features an optimized hull shape, and the option to install a hard sail to generate extra propulsion. The hard sail system is being created jointly by Oshima Shipbuilding and Mitsui O.S.K. Lines.
