Air pollution by ships in close proximity to dense populated areas
Delvaeye, J. (2020). Air pollution by ships in close proximity to dense populated areas. MSc Thesis. Universiteit Gent, Faculteit Ingenieurswetenschappen en Architectuur: Gent. 153 pp.
https://lib.ugent.be/catalog/rug01:002946295
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Document type: Dissertation
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| Keywords |
Confined water
Maritime transport
Pollutants > Air pollutants > Greenhouse gases
Water > Shallow water
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| Author keywords |
Propeller-engine interaction |
| Abstract |
The maritime shipping sector is responsible for 2.6% of the global CO2 emissions, which are assumed to increase by 150-250% in business-as-usual scenarios. This critical scenario has boosted research and investment regarding technological measures to reduce harmful emissions. This dissertation investigates the problem of emissions caused by a ship and presents the results of a case study performed on a bulk carrier sailing along the channel Ghent-Terneuzen. In addition, the air pollutants over a specific part of this trajectory were compared with a similar situation in deep and unrestricted water. The present study is based on a model developed with a reversed-calculation procedure of the propeller engine interaction. Results show a significant increase when sailing in shallow and confined water, with ratios of 1.89 for CO2 and SO2 emissions and even higher for others. Moreover, the ship’s efficiency takes a serious drop as well, going from an average of 21.3% in deep water to an average of 16-18% in shallow water, with a minimum of 11.7%. Additionally, the effect of using HFO instead of MDO resulted in a slightly higher efficiency, while also emitting more harmful pollutants. |
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