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Bionics and green technology in maritime shipping: an assessment of the effect of Salvinia air-layer hull coatings for drag and fuel reduction

  • To save energy and reduce environmental impacts, new technologies towards a development of a sustainable ‘greener’ economy are needed. The main opportunity to improve sustainability by reducing emissions is within the transport sector. More than 90% of all goods worldwide are transported by ships. Particularly maritime ships using heavy fuel oil and marine gas oil play a major role. The total fuel consumption of shipping in 2016 was about 250 m t (domestic ca. 50 m t, international shipping ca. 200 m t). The vast portion of the energy consumption of a ship is the need to overcome the drag between ship hull and water—depending on the shape of the vessel and its size up to 90% of total fuel consumption. This means reducing drag helps to save fuel and reduces carbon emissions as well as pollution considerably. Different techniques for drag reduction are known, e.g. the micro-bubble technique or the bulbous bow. We investigated a novel bioinspired technique since 2002: the application of biomimetic surfaces with long-term stable air layers on ship hulls, serving as a slip agent. This technology is based on the Salvinia Effect, allowing a permanent stabilization of air layers under water. In this case study, we analysed the possible savings, which also could be combined with modified micro-bubble technologies.

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Document Type:Article
Author:J. Busch, W. Barthlott, M. Brede, W. Terlau, M. Mail
Parent Title (English):Phil. Trans. R. Soc. A (Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences)
First Page:20180263
Pubmed Id:http://www.ncbi.nlm.nih.gov/pubmed?term=30967069
Publisher:The Royal Society
Date of first publication:2018/12/24
Electronic supplementary material is available online at https://dx.doi.org/10.6084/m9.figshare.c.4335905
Tag:climate change; emissions; fouling; green economy; superhydrophobic surfaces; surface technologies
Departments, institutes and facilities:Fachbereich Wirtschaftswissenschaften
Internationales Zentrum für Nachhaltige Entwicklung (IZNE)
Dewey Decimal Classification (DDC):3 Sozialwissenschaften / 33 Wirtschaft / 333 Boden- und Energiewirtschaft
Entry in this database:2019/01/09