Design and Comparison of Dual Fuel Schemes for a Medium Sized Container Vessel
Taking a medium-sized dual fuel container ship as an example,this paper summarizes the design of three dual fuel schemes:LNG(Liquefied Natural Gas)B-type tank dual fuel scheme,LNG membrane tank dual fuel scheme,and methanol dual fuel scheme.The fuel tank capacity,endurance,empty ship weight,14 t heavy container index,EEDI(Energy Efficiency Design Index),and CII(Carbon Intensity Indicator)of these three schemes are compared and analyzed.The comparison results show that under the same layout space,the fuel tank capacity of the LNG dual fuel scheme is smaller than that of the methanol dual fuel scheme,but its lightweight is greater;Due to the higher energy density and lower mass density of LNG compared to methanol,the range of LNG dual fuel scheme is greater than that of methanol dual fuel scheme,and its 14 t heavy container intake index is better.Based on current technological conditions,the EEDI and CII of the LNG dual fuel scheme are superior to the dual fuel methanol scheme.However,with the continuous development of green methanol technology,the methanol dual fuel scheme will have more advantages.
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