New environmental regulations indicate that a ‘business as usual’ approach is no longer an option towards sustainable shipping. LNG is one of the potential alternative solutions to help meet the specified IMO fuel sulphur content limits since it contains only traces of sulphur. Gas and dual fuel (DF) engines utilizing the Otto combustion process can produce NOx emissions below the IMO Tier III limits, and the C/H ratio of LNG allows a significant fuel based reduction of CO2 emissions also. This paper discusses the challenges involved and how these were met when considering LNG as fuel in an ocean-going dry bulk carrier, with a focus on the main challenges involved with CAPEX and engine technologies and their effect on vessel design. The study was conducted by Arista Shipping in conjunction with the American Bureau of Shipping (ABS) and Wärtsilä, and was based on a representative bulk carrier design, an 82,000 dwt Kamsarmax vessel, which was selected as the project platform due to its proven design and high cargo capacity.

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