The Underwater Venting of Methanol Vapour
conference paper
Sailing on methanol supports the decarbonisation of shipping. Venting under water is a solu tion to avoid dangerous zones, normally created by venting toxic methanol above deck. An Eulerian based Computational Fluid Dynamics (CFD) model and a simple integral model are used to predict the methanol concentration above the waterline after underwater venting of methanol vapour. Both models are successfully validated against experimental data from a methane release at the bottom of a water basin. The CFD model showed superiority over the integral model. The numerical models are applied on a mixture of methanol and nitrogen being vented during bunkering. The gas dissolution depends strongly on the bubble diameter and venting depth. The CFD model shows in the most critical case the gas dissolution being sufficient and no methanol vapour reaches the deck of the ship. The underwater venting of methanol-nitrogen vapour proves to be a safe alternative compared to venting above deck
Topics
TNO Identifier
996558
Source title
MARTECH 2024. 7th International Conference on Maritime Technology and Engineering, 14-16 May 2024, Lisbon, Portugal
Pages
1-8
Files
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