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On the energy required to maintain an ocean mirror using the reflectance of foam

Garciadiego Ortega, E; Evans, JRG; (2018) On the energy required to maintain an ocean mirror using the reflectance of foam. Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment 10.1177/1475090217750442. (In press). Green open access

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Abstract

Among the various interventions proposed to remediate the health and security effects of climate change by solar radiation protection is the proposal to enhance natural ocean whitecap formation. Compared to other solar protection interventions, this is technically simple and quickly terminated. However, it has a drawback: even if the energy be obtained from wind or wave, the power demand to maintain a foam raft determines the capitalization of equipment. The average power demand is inversely related to foam lifetime which can be prolonged by surfactants preferably derived from ingenerate resources. Here, we estimate the associated energy and power demands by identifying the parameters that can be adjusted to moderate the capital cost of implementation. Before dividing by efficiency factors, the range of power demand for an intermediate areal energy requirement of 5 MJ/km2 of ocean varies from 6 to 30 W/km2 for foam lifetime of 10–2 days. The most likely route to deployment is through merchant ship lubrication using bubbly liquids which both reduces fuel consumption and creates an extended wake and is perhaps an example of technical symbiosis.

Type: Article
Title: On the energy required to maintain an ocean mirror using the reflectance of foam
Open access status: An open access version is available from UCL Discovery
DOI: 10.1177/1475090217750442
Publisher version: http://doi.org/10.1177/1475090217750442
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Albedo, climate restoration, ocean foam, reflectance
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 Chemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/10046949
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