Comparative analysis of alternative ways to ensure compliance with environmental standards for marine exhaust emissions (part 2)

Abstract

The requirements adopted by the International Maritime Organization in 2020 and set out in annex VI to the MARPOL 73/78 Convention concerning the limitation of sulfur and nitrogen oxides in ship exhaust gases have led to an increase in international transportation costs. These costs are primarily related to the need to switch to expensive low-sulfur fuels while completely eliminating the use of traditional fuel oil, and although marine exhaust gas purification equipment (the so-called scrubber) allows you to continue using high-sulfur fuels, this is also associated with significant costs for installing and operating a scrubber.

At the same time, compliance with environmental standards can be achieved through the use of non-traditional fuels on board as a truly "clean" fuel, which, among other things, includes natural gas, which, in order to achieve maximum efficiency of storage, transportation and use, is liquefied on special equipment, cooled to a temperature of -163 °C. The constructive aspects of implementing the above-mentioned methods to achieve compliance with environmental standards on ships are highlighted below, and their cost is compared using the example of CNF19M ferries.

In their previous work [1], the continuation and addition of which is the proposed article, the authors have already made a similar comparison using the example of Aframax class tankers under construction at the Zvezda shipbuilding complex, but found it necessary to highlight a number of additional aspects in using methods, which became the object of the proposed publication.