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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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Preprints
https://doi.org/10.5194/wes-2019-100
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2019-100
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 24 Feb 2020

Submitted as: research article | 24 Feb 2020

Review status
A revised version of this preprint is currently under review for the journal WES.

Exploitation of the far-offshore wind energy resource by fleets of energy ships. Part A. Energy ship design and performance

Aurélien Babarit, Gaël Clodic, Simon Delvoye, and Jean-Christophe Gilloteaux Aurélien Babarit et al.
  • LHEEA, Ecole Centrale de Nantes – CNRS, Nantes, 44300,France

Abstract. This paper deals with a new concept for the conversion of far-offshore wind energy into sustainable fuel. It relies on autonomously sailing energy ships and manned support tankers. Energy ships are wind-propelled. They generate electricity using water turbines attached underneath their hull. Since energy ships are not grid-connected, they include onboard power-to-X plants for storage of the produced energy. In the present work, the energy vector is methanol.

The aim of the paper is to propose an energy ship design and to provide an estimate for its energy performance as function of the wind conditions. The energy performance assessment is based on a numerical model which is described in the paper. Results show that the wind energy-to-methanol (chemical energy) conversion efficiency is 24 % and that such energy ship deployed in the North Atlantic Ocean could produce approximately 5 GWh per annum of chemical energy (900 tonnes of methanol per annum).

Aurélien Babarit et al.

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Status: final response (author comments only)
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Aurélien Babarit et al.

Aurélien Babarit et al.

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Latest update: 01 Jun 2020
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Short summary
This paper addresses the topic of far-offshore wind energy exploitation. Far-offshore wind energy exploitation is not feasible with current technology (grid-connected floating wind turbines) because grid-connection cost, installation cost and O&M cost would be prohibitive. An enabling technology is the energy ship concept, which is described and modelled in the paper. A design of an energy ship is proposed. It is estimated that it could produce 5 GWh per annum of chemical energy (methanol).
This paper addresses the topic of far-offshore wind energy exploitation. Far-offshore wind...
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