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. |
