Abstract No.C180227-240

Author name(s): Shaowei CHU, Song LIU

Company: Marine Design & Research Institute of China, China

In order to adapt to restricted control rules of maritime pollution emission, more and more ship owners prefer to reserve the choice of Liquefied Natural Gas (LNG) as alternative fuel in the future. At ship design stage the pre-consideration of dual fuel conversion in future is called LNG READY. The paper introduces our experience of LNG READY in the design of ultra large container ships (ULCS). The basic requirement of LNG READY is explained first, including the conversion of structure, main engine, auxiliary engine, piping and boiler, etc. Class notation and corresponding requirement of different class society are introduced and compared. The main difference of LNG READY between ULCS, bulk carrier and oil tanker is summarized briefly. The type of LNG tank is selected as B type or integrated membrane according to different conversion design. The location of LNG tank and corresponding fuel gas supply system are introduced and two suggested designs are given. Several important details such as hazardous area, ventilation of LNG system are summarized. General process of conversion for type A or type B tanks is introduced in the end.

KEY WORDS: LNG READY; ULCS; dual fuel; conversion in the future; hazardous area

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