Articles | Volume 5, issue 3
https://doi.org/10.5194/wes-5-839-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-5-839-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
03 Jul 2020
Research article |
| 03 Jul 2020
| 03 Jul 2020
Exploitation of the far-offshore wind energy resource by fleets of energy ships – Part 1: Energy ship design and performance
Aurélien Babarit
CORRESPONDING AUTHOR
LHEEA, École Centrale de Nantes – CNRS, Nantes, France
Gaël Clodic
LHEEA, École Centrale de Nantes – CNRS, Nantes, France
Simon Delvoye
LHEEA, École Centrale de Nantes – CNRS, Nantes, France
Jean-Christophe Gilloteaux
LHEEA, École Centrale de Nantes – CNRS, Nantes, France
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This paper addresses the topic of far-offshore wind energy exploitation. Far-offshore wind energy exploitation is not feasible with current technology because grid-connection cost, installation cost and O&M cost would be prohibitive. An enabling technology for far-offshore wind energy is the energy ship concept, which has been described, modelled and analyzed in a companion paper. This paper provides a cost model and cost estimates for an energy system based on the energy ship concept.
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This study deals with energy performance optimization of Unmoored Floating Offshore Wind turbines (UFOWTs). UFOWTs use thrusters in lieu of mooring systems for position control. Previous studies have shown that net positive power generation can be achieved depending on design. In this study, we investigate the effect of rotor design. Results show that the optimal rated induction factor is smaller than the usual value of 1/3 both from the perspective of energy performance and cost of energy.
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In this paper, a new energy system for the conversion of far-offshore wind energy into methanol is proposed, and the cost of energy is estimated. Results show that this system could produce approximately 70 000 t of methanol per annum at a cost comparable to that of methanol produced by offshore wind farms in the long term.
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Anna-Maria Tilg, Charlotte Bay Hasager, Hans-Jürgen Kirtzel, and Poul Hummelshøj
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Jakob Ilsted Bech, Charlotte Bay Hasager, and Christian Bak
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Tobias Ahsbahs, Merete Badger, Patrick Volker, Kurt S. Hansen, and Charlotte B. Hasager
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Sebastian Schafhirt and Michael Muskulus
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Lisa Ziegler, Ursula Smolka, Nicolai Cosack, and Michael Muskulus
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Antonio Jarquin Laguna
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Steffen Aasen, Ana M. Page, Kristoffer Skjolden Skau, and Tor Anders Nygaard
Wind Energ. Sci., 2, 361–376, https://doi.org/10.5194/wes-2-361-2017, https://doi.org/10.5194/wes-2-361-2017, 2017
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The industry standard for analysis of monopile foundations is inaccurate, and alternative models for foundation behavior are needed. This study investigates how four different soil-foundation models affect the fatigue damage of an offshore wind turbine with a monopile foundation. Stiffness and damping properties have a noticeable effect, in particular for idling cases. At mud-line, accumulated fatigue damage varied up to 22 % depending on the foundation model used.
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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 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 modeled 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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