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Flushing ballast tanks

Qi, Z; Eames, I; Greig, A; (2014) Flushing ballast tanks. Ocean Engineering , 89 157 - 172. 10.1016/j.oceaneng.2014.07.022. Green open access

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Abstract

The International Maritime Organization requires ballast water tanks to be flushed through with three tank volumes to remove aquatic species. We apply a network model for multiply connected compartments to analyse the influence of internal geometry and inlet-outlet positions on how much of the initial water of each compartment is flushed in time. A complementary experimental study was undertaken to quantify the flushing from 2×2, 3×3 and 5×4 tank configurations by an optical method. The agreement between the predictions and measurements is good. The results show that the flushing in a multi-compartment tank is generally more efficient than perfect mixing. The 95% reduction is met after three exchange volumes in all cases. The outlet needs to be positioned far from the inlet to reduce bypassing through the tank. These results are finally discussed in the context of international regulations for flushing ballast tanks. © 2014 The Authors.

Type: Article
Title: Flushing ballast tanks
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.oceaneng.2014.07.022
Publisher version: http://dx.doi.org/10.1016/j.oceaneng.2014.07.022
Language: English
Additional information: Copyright © 2014. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/).
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1380808
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