Considerations on economic and ecological analysis of naval propulsion systems

Abstract

Shipowners have begun to invest in "dual-fuel" propulsion because of the price of fuel and pollution standards that are becoming more and more stringent every day. In order to meet the needs of shipowners, MAN B&W is one of the brains that have invested heavily in research and developed dual-fuel not only economical but also safe, reliable, environmentally friendly. The new Wartsila series engines have been designed to deliver newer and more modern engines with the latest developments in functional, production, common-rail electronic systems, and more, as well as units that develop much higher powers. In these applications, the key needs are economic operations, low oil and fuel consumption, stable operating speeds, high reliability, long service maintenance, compactness and optimized industrialization. The EEDI index implies a minimum acceptable level in terms of ship energy efficiency, quantified by CO2 emissions and relative to freight and transport distance. Supported values will be reduced depending on the implementation phases; it expects the implementation of this index to drive the deployment of innovative shipboard technologies to influence their energy efficiency. The measures to reduce the EEDI value are foreseen in SEEMP existing on board ships. These include both approaches to the implementation of new technologies and operational ones.