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Original scientific paper

https://doi.org/10.18048/2016-00.131

Comparison of COGES and Diesel-Electric Ship Propulsion Systems

Vedran Mrzljak orcid id orcid.org/0000-0003-0323-2600
Tomislav Mrakovčić orcid id orcid.org/0000-0003-1179-2771 ; Faculty of Engineering Rijeka, Vukovarska 58, 51000 Rijeka


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Abstract

Diesel-electric ship propulsion is a frequent shipowners choice nowadays, especially on passengerships. Despite many diesel engines advantages, their primary disadvantage is emission of pollutants. As
environmental standards become more stringent, the question of optimal alternative to diesel-electric propulsion arises. COGES (COmbined Gas turbine Electric and Steam) propulsion system is one of the proposals for alternative propulsion system, primarily due to significant reduction of pollutant emissions. On the other hand, gas turbines have higher specific fuel consumption in comparison with
diesel engines what represents their noticeable disadvantage. However, some analyzes suggested that COGES propulsion system could be still cost-effective in comparison to diesel-electric propulsion,
particularly on passenger ships where higher initial investment can be compensated by increasing the number of passenger cabins. This paper shows a comparison of above mentioned propulsion systems,
which can be useful for the optimal ship propulsion system selection

Keywords

COGES; diesel-electric propulsion; emission of pollutants

Hrčak ID:

154966

URI

https://hrcak.srce.hr/154966

Publication date:

4.4.2016.

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