Considering the impact of the boundary width of the emission control area(ECA),a mixed-integer nonlinear pro-gramming model is established with the objective of minimi-zing the total operational costs of the vessel,thereby optimi-zing emission reduction strategies and sailing speed.The Southeast Asian route of a certain company is taken as an ex-ample for solution and sensitivity analysis.Results show that the cost comparison of different emission reduction schemes is mainly affected by the level of fuel oil prices,while carbon ta-xes have no impact on the cost comparison results of different schemes.From the current various fuel oil prices,desulfuriza-tion towers installation is the most economical emission reduc-tion measure,which is followed by the ECA internal and ex-ternal fuel conversion strategy,using MGO fuel strategy,and using LNG fuel strategy,respectively.As the width of ECA decreases and the difference in fuel oil prices decreases,the cost of fuel conversion schemes will be lower than that of in-stalling desulfurization towers.When the initial investment cost of using LNG fuel is reduced to 80%or less,or the price of LNG fuel is reduced to 50%or less,while the price of MGO fuel is invariable or higher,the cost of using LNG fuel will be lower than that of using MGO fuel.The setting of the ECA width will affect the emission reduction strategy of ship-ping companies,while by appropriately increasing the width of the ECA,the behavior of ship companies switching fuels in-side and outside the ECA can be reduced.
ship emission reductionemission reduction meas-uresemission control area(ECA)boundary widthoptimiza-tion of sailing speedmixed integer nonlinear programming
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