Abstract
The performance of a marine dual-fuel engine, equipped with an innovative hybrid turbocharger producing electric power to satisfy part of the ship’s electric load, is presented by a simulation comparison with the traditional turbocharging technology. The two distinct fuel types, combined with the hybrid turbocharger, involve a substantial change in the engine control modes, resulting in more flexible and efficient power management. Therefore, the investigation requires a numerical analysis depending on the engine load variation, in both fuelling modes, to highlight different behaviours. In detail, a dual-fuel engine simulation model is validated for a particular application in order to perform a complete comparison, reported in tabular and graphical form, between the two examined turbocharging solutions. The simulation analysis is presented in terms of the engine working data and overall energy conversion efficiency.
Highlights
Due to the need to mitigate the harmful impact deriving from marine engines powered by fossil fuels, the regulations implemented over the years by the International Maritime
The present analysis shows the behaviour of a marine DF engine in the TC/hybrid turbocharger (HTC)
The present study aims to extend the comparison analysis to to include of the heavy fuel oil (HFO)-powered engine in order to have a valid overview of inthe include the the casecase of the in order to have a valid overview of the influence of the different working conditions and related combustion control methods fluence of the different working conditions and related combustion control methods on on the behaviour of the engine in the two distinct turbocharging configurations
Summary
Due to the need to mitigate the harmful impact deriving from marine engines powered by fossil fuels, the regulations implemented over the years by the International Maritime. IMO rules are increasingly restrictive about the ship’s polluting emissions of nitrogen and sulphur oxides (IMO Tier II and III, and ECA world areas [2]), while the energy efficiency design index (EEDI) has become mandatory for carbon dioxide [3,4]. This framework needs new measures to improve the energy conversion efficiency of propulsion engines and diesel–electric generators
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