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Identification of emission indicators harmful compounds for assessment of dynamic state of a marine diesel engine

100%

Bogdanowicz A. , Zadrąg R.

tom R. 58, nr 3

247--251

The operation of a ship's propulsion system is a variable process in time, which is described in both static and dynamic states. The mutual proportions between them depend primarily on a type of ship and tasks to which it was designed. In a case of special units of particular use (e.g. warships) and ships, which operate on narrow waters such as canals or port basins, participation of dynamic states is increasing significantly. Hence a necessity to analyze the dynamic states of marine diesel engines, among others in terms of their increased harmful compounds emission. The paper presents a methodology of engine dynamic state analysis, emission indicators that can be used to assess the dynamic state of a ship have been proposed. As an example of application, the analysis of harmful compounds emissions during dynamic states while a real cruise of navy ship has been carried out. It has been also proposed to use simple dynamics indicators such as single-base and chain indexes to describe the change in concentrations of harmful compounds in dynamic states.

Analysis of simulated dynamic loads of a ship propulsion system of a non-conventional power system

61%

Zadrąg R. , Socik P. , Kniaziewicz T. , Zacharewicz M. , Bogdanowicz A. , Wirkowski P.

2024

tom R. 63, nr 2

158--168

Unconventional approaches to propulsion system design are increasingly being explored to meet increasing demands for efficiency, ecology, and reliability. This paper focuses on the analysis of simulated dynamic loads on the propulsion system of ships that feature unconventional power systems - Reformed Methanol Fuel Cell System (RMFC). The analysis is aimed at understanding the performance of these systems under dynamic sea conditions, assessing their performance, and identifying potential challenges and benefits associated with them (including military ones). According to military assumptions, an undeniable benefit is the minimization of the ship's physical fields and its independence from the base (i.e., in the future, obtaining hydrogen from seawater electrolysis).