To prevent air pollution caused by ships, through a long term review and discussion process by the IMO(International Maritime Organization), the MEPC(Marine Environment Protection Committee) 2008 made a decision to implement Tier III for ships navigating through ECAs (Emission Control Areas) starting in 2016.
In this research when the diesel fuel propulsion system of medium range tankers that navigate the seacoasts that fall under ECAs or the governance of the EPA (US environmental protection agency) is changed to a liquefied natural gas fuelled propulsion system that satisfies SOx emissions regulations or when a hybrid scrubber system is additionally installed to the diesel fuelled propulsion system, according to oil price prediction scenarios by analyzing the CAPEX(capital expenditures) and the OPEX(operating expenses), the economic impact and the profits of the two propulsion systems were examined.
As a result, when changing the medium range tanker to a liquefied natural gas fuelled propulsion system or when additionally installing an additional hybrid scrubber system to the diesel fuelled propulsion system, it was confirmed that the liquefied natural gas fuelled propulsion system was sufficed to be an economic alternative.
When constructing ships that have liquefied natural gas fuelled propulsion systems implemented in the future, it is considered that this research can be used by shipping firms as relevant materials for proposing rational solutions and for proposals on environmental regulations.