Economic and environmental comparison between diesel-electric and mechanical propulsion plants for a small cruise ship

Giovanni Benvenuto, Ugo Campora
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Abstract

The paper reports an economic and environmental comparison between diesel-electric and mechanical propulsion plants, employed as an alternative to the other one, to the propulsion of a small cruise ship, also described in a previously authors article. The plants prime mover are two versions of the Rolls-Royce Bergen marine diesel engines, employed one as an alternative to the other in all the considered propulsion plants. The engines are characterized by similar rated power but with different power lint curves and specific fuel contours trend in the operating diagram. The diesel-electric propulsion plants are simulated considering the diesel generators working in both constant and variable speed. The economic and environmental (by EEDI and CII index) comparison results, between the considered ship propulsion plants, are presented in tabular and graphical form and commented.
小型游轮柴油-电力推进装置与机械推进装置的经济和环境比较
本文报告了柴油-电力推进装置和机械推进装置在经济和环境方面的比较,这两种推进装置被用作小型游轮推进装置的替代品。设备的原动机是两种型号的劳斯莱斯 Bergen 船用柴油发动机,在所有考虑的推进设备中,一种发动机可替代另一种发动机。这两款发动机的额定功率相似,但在运行图中的功率曲线和比燃料等值线趋势不同。考虑到柴油发电机在恒速和变速状态下工作,对柴油-电力推进装置进行了模拟。所考虑的船舶推进装置之间的经济和环境(通过 EEDI 和 CII 指数)比较结果以表格和图形形式呈现,并进行了评论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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