Marine renewable energies

Paillard, Michel; Lamblin, Véronique; Lacroix, Denis

doi:10.35690/978-2-7592-0184-6

2009

DOI: 10.35690/978-2-7592-0184-6

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Marine renewable energies

Michel Paillard¹,

Véronique Lamblin²,

Denis Lacroix³

Abstract: They also thank Olivier Barbaroux and Gérard Véron for their contributions to the artwork, as well as all the authors of the variables fact sheets who were kind enough to illustrate them.Warm thanks also go to Janet Heard-Carnot and Valerie Howe for translating and editing the English version of the book. Special thanks are due to the team from the Communications Department at Ifremer headquarters for their support in the final phase leading to publication, particularly Pascale Pessey Martineau and Mathieu Jah… Show more

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Cited by 3 publications

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Ocean thermal energy conversion by deliberate seawater salinization

Arias

2017

Int J Energy Res

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This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.Consideration is given to the possibility of ocean thermal energy conversion (OTEC) by the deliberate salinization of surface seawater. The proposed technique is similar to traditional OTEC, with one important exception: rather than cold water being brought from the bottom to the surface, the warm surface water is circulated to the bottom, cooled there, and lifted back to the surface. The entire process is driven by the induced salinity gradient at the surface. As a result, there is no need for a pumping system to bring the cold bottom water to the surface. Two methods are explored for surface salinity enhancement, namely solar evaporation and the direct addition of salt to the seawater.Peer ReviewedPostprint (author's final draft

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Ocean thermal energy conversion by deliberate seawater salinization

Arias

2017

Int J Energy Res

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Interactions between oceans and societies in 2030: challenges and issues for research

Lacroix¹,

David

Lamblin

et al. 2016

Eur J Futures Res

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The perception of ocean areas by policymakers or by people, living or not on the coast, has significantly varied over centuries. Due to its vastness and complexity, the sea has been studied within distinct academic disciplines. However, the current issues related to the sea, such as climate change, marine pollution or coastal tourism, require an integrated vision of the assets and drawbacks in order to meet the challenges arising from human activities both at sea and onshore. In this study, a group of foresight officers from the French network of public research institutes decided to crosscheck and compare several science approaches (biology, sociology, economics, etc) about oceans. Thus, 11 sectors of maritime activity (transportation, fisheries, energy, etc.) were cross-tabulated with 9 basic social functions (providing food, housing, learning, etc.). In this matrix, the main challenges and issues projected for 2030 were sought, in the frame of a baseline scenario.Results were clustered through 4 criteria, leading to 9 major challenges, each of them broken down into two important issues for research. The outcomes were used to create a survey, allowing the ranking of the research priorities. Most of the 9 challenges tally with the research and development objectives of great maritime states, except for governance and monitoring, which remain underscored. As a result, maritime powers still show more interest on securing national resources rather than on promoting international cooperation for secure trade and sustainable exploitation of marine resources. But foresight in this field could help changing the mentalities notably because oceans show clearly now to be a vital common good for mankind.

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Impact of Tidal Level Variations on Wave Energy Absorption at Wave Hub

Castellucci

Waters

2016

Energies

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Abstract:The energy absorption of the wave energy converters (WEC) characterized by a limited stroke length -like the point absorbers developed at Uppsala University-depends on the sea level variation at the deployment site. In coastal areas characterized by high tidal ranges, the daily energy production of the generators is not optimal. The study presented in this paper quantifies the effects of the changing sea level at the Wave Hub test site, located at the south-west coast of England. This area is strongly affected by tides: the tidal height calculated as the difference between the Mean High Water Spring and the Mean Low Water Spring in 2014 was about 6.6 m. The results are obtained from a hydro-mechanic model that analyzes the behaviour of the point absorber at the Wave Hub, taking into account the sea state occurrence scatter diagram and the tidal time series at the site. It turns out that the impact of the tide decreases the energy absorption by 53%. For this reason, the need for a tidal compensation system to be included in the design of the WEC becomes compelling. The economic advantages are evaluated for different scenarios: the economic analysis proposed within the paper allows an educated guess to be made on the profits. The alternative of extending the stroke length of the WEC is investigated, and the gain in energy absorption is estimated.

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Marine renewable energies

Cited by 3 publications

References 1 publication

Ocean thermal energy conversion by deliberate seawater salinization

Ocean thermal energy conversion by deliberate seawater salinization

Interactions between oceans and societies in 2030: challenges and issues for research

Impact of Tidal Level Variations on Wave Energy Absorption at Wave Hub

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