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Effects of Ship Manoeuvring Motion on NOX Formation

Lookup NU author(s): Dr David Trodden, Dr Maryam Haroutunian

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


Abstract

Oxides of Nitrogen (NOX) are harmful to human health, as such their emissions are monitored and controls arebecoming increasingly stringent.NOX formation is dependent on engine running conditions and therefore on ship operation; there will be differencesin the amount of NOX produced when a ship is travelling in a straight line, compared to when manoeuvring.Ships tend to spend more time in manoeuvring conditions around population dense areas such as inland waterways,compared to when on the deep sea. It is therefore important to investigate the difference that manoeuvring motion hason NOX production, compared to steady-state running.Emission factors, which are often given as a function of fuel oil consumption and based upon steady-state conditions,are frequently used to estimate engine emissions. In this paper, an emission factor is developed using a numericalengine model coupled with chemical kinetics computations. The same model, coupled to a ship manoeuvringsimulator is then used to compare NOX formation during manoeuvring operations.It is demonstrated that during manoeuvres, the developed simulator exhibits significant differences in NOX formation,compared to the commonly used emission factor approaches.


Publication metadata

Author(s): Trodden DG, Haroutunian M

Publication type: Article

Publication status: Published

Journal: Ocean Engineering

Year: 2018

Volume: 150

Pages: 234–242

Print publication date: 15/02/2018

Online publication date: 05/01/2018

Acceptance date: 18/12/2017

ISSN (print): 0029-8018

ISSN (electronic): 1873-5258

Publisher: Pergamon Press

URL: https://doi.org/10.1016/j.oceaneng.2017.12.046

DOI: 10.1016/j.oceaneng.2017.12.046


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