TRIAL DESIGN OF A LIQUEFIED CO2 CARRIER

In this paper the basic concept of a liquefied CO2 (LCO2) carrier is studied from the aspect of the physical properties of LCO2, and environmental control of the cargo tank and hold space, design and arrangement of cargo tanks, dimensional study of hull form, damage stability and related subjects. The authors proposed a 49,000 m3 vessel with six spherical tanks of 9% Ni steel of IMO designation type C stored in the hold, controlled with for the CO2 vapour. The study assumes that the tank wall has a thickness of around 40 mm satisfying the Charpy value requirement and a cargo pressure of 7 kgf/cm2. Studies for damage stability according to the IMO regulation gas code 3G type showed the consideration of high density of the cargo would be a key factor for the hull arrangement. The paper shows a selection of the extensive hull configurations including some new concepts.