Machinery Options for Green Ship

Shipping is critical to global economy being means of transportation for 90 % of world trade goods. Shipping continues to remain the most environmental friendly transportation option compared to other available means due to lowest gCO2/ton.km emissions. It can however not be overlooked that shipping is responsible for 3 % of global CO2 emissions, 14-15 % of global NOX emissions and 16 % of global SOX emissions. International Maritime Organization (IMO) is committed to reducing shipping emissions through policy and regulatory measures. Marine Pollution (MARPOL) regulations have been increasingly demanding to tackle aggravating environmental concerns. IMO has been introducing measures for better energy-effectiveness (i.e. SEEMP) in addition to better environmental performance (i.e. EEDI). Green ship concepts require exploring and implementing technologies and practices on ships to reduce emissions and increase energy-efficiency. Ship machinery is an important area with large potential to reduce emissions and increase cost-and-energy-effectiveness. This paper provides a comprehensive review of the machinery options for green ship. The author will discuss basic concepts, principles and potential of machinery options for green ship in detail.