الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The increasing pressure on the fuel consumption reduction and exhaust gas emissions from ships has forced the ship owners and the concerned bodies to seek alternative ways and methods to abide by IMO regulations. Electrification of ship conventional propulsion systems has shown considerable improvements to reduce fuel consumption and emissions. This thesis studies the influence of replacing conventional propulsion systems of a cruise ship with electric propulsion systems, concentrating on the fuel consumption, emissions, and operation and maintenance costs. This task is achieved by defining a methodology to select an electric propulsion system, using real data collected from a referenced voyage of a case study: M/S Birka Stockholm cruise ship. The starting point is analysing the referenced voyage profile. Afterward, the design consideration and the technical layout of the components are considered as per the IMO and the classification society regulation. Next, the specification of the electric propulsion system components, mainly the engines and the batteries-pack, are evaluated. Finally, a comparison between the conventional and electric systems is made.The designed electric propulsion systems use the same main engines of the conventional systems, but eliminating the auxiliary engines and replacing them with the battery pack. The battery pack serves two purposes; maintaining the main engines at their optimum point and providing power demand when only the auxiliary load is requested.The results show that there is a reduction in fuel consumption by about 7.66% in addition to a decrease in SOX, CO2, and NOX pollutants by 16Kgs, 5.3 tons, and 432 Kgs respectively per voyage. The decrease in SOX and CO2 are directly proportional to the fuel consumed while the NOX is about 26.6%. The SOX and CO2 are estimated using the fuel-based method while the NOX is estimated using a power-based method. The result also reveals that the cost of the operation and maintenance for the electric systems is roughly 1.9% less compared to conventional systems.