Cost Optimization of Mooring Solutions for Large Floating Wave Energy Converters

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Abstract

The increasing desire for using renewable energy sources throughout the world has resulted in a considerable amount of research into and development of concepts for wave energy converters. By now, many different concepts exist, but still, the wave energy sector is not at a stage that is considered commercial yet, primarily due to the relatively high cost of energy. A considerable amount of the wave energy converters are floating structures, which consequently need mooring systems in order to ensure station keeping. Despite being a well-known concept, mooring in wave energy application has proven to be expensive and has a high rate of failure. Therefore, there is a need for further improvement, investigation into new concepts and sophistication of design procedures. This study uses four Danish wave energy converters, all considered as large floating structures, to investigate a methodology in order to find an inexpensive and reliable mooring solution for each device. The study uses a surrogate-based optimization routine in order to find a feasible solution in only a limited number of evaluations and a constructed cost database for determination of the mooring cost. Based on the outcome, the mooring parameters influencing the cost are identified and the optimum solution determined.
Original languageEnglish
Article number159
JournalEnergies
Volume11
Issue number1
Number of pages23
ISSN1996-1073
DOIs
Publication statusPublished - 2018

Fingerprint

Cost Optimization
Mooring
Converter
Energy
Costs
Renewable Energy
Sector
Concepts
Optimization
Methodology
Evaluation

Bibliographical note

The article is published in a Special Issue of Energies, "Wave Energy Potential, Behavior and Extraction".

Keywords

  • Mooring
  • station keeping
  • Wave energy
  • Optimization
  • Meta-modeling
  • Surrogate model
  • Cost
  • Wave energy converters
  • WEC

Cite this

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title = "Cost Optimization of Mooring Solutions for Large Floating Wave Energy Converters",
abstract = "The increasing desire for using renewable energy sources throughout the world has resulted in a considerable amount of research into and development of concepts for wave energy converters. By now, many different concepts exist, but still, the wave energy sector is not at a stage that is considered commercial yet, primarily due to the relatively high cost of energy. A considerable amount of the wave energy converters are floating structures, which consequently need mooring systems in order to ensure station keeping. Despite being a well-known concept, mooring in wave energy application has proven to be expensive and has a high rate of failure. Therefore, there is a need for further improvement, investigation into new concepts and sophistication of design procedures. This study uses four Danish wave energy converters, all considered as large floating structures, to investigate a methodology in order to find an inexpensive and reliable mooring solution for each device. The study uses a surrogate-based optimization routine in order to find a feasible solution in only a limited number of evaluations and a constructed cost database for determination of the mooring cost. Based on the outcome, the mooring parameters influencing the cost are identified and the optimum solution determined.",
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Cost Optimization of Mooring Solutions for Large Floating Wave Energy Converters. / Thomsen, Jonas Bjerg; Ferri, Francesco; Kofoed, Jens Peter; Black, Kevin.

In: Energies, Vol. 11, No. 1, 159, 2018.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - Cost Optimization of Mooring Solutions for Large Floating Wave Energy Converters

AU - Thomsen, Jonas Bjerg

AU - Ferri, Francesco

AU - Kofoed, Jens Peter

AU - Black, Kevin

N1 - The article is published in a Special Issue of Energies, "Wave Energy Potential, Behavior and Extraction".

PY - 2018

Y1 - 2018

N2 - The increasing desire for using renewable energy sources throughout the world has resulted in a considerable amount of research into and development of concepts for wave energy converters. By now, many different concepts exist, but still, the wave energy sector is not at a stage that is considered commercial yet, primarily due to the relatively high cost of energy. A considerable amount of the wave energy converters are floating structures, which consequently need mooring systems in order to ensure station keeping. Despite being a well-known concept, mooring in wave energy application has proven to be expensive and has a high rate of failure. Therefore, there is a need for further improvement, investigation into new concepts and sophistication of design procedures. This study uses four Danish wave energy converters, all considered as large floating structures, to investigate a methodology in order to find an inexpensive and reliable mooring solution for each device. The study uses a surrogate-based optimization routine in order to find a feasible solution in only a limited number of evaluations and a constructed cost database for determination of the mooring cost. Based on the outcome, the mooring parameters influencing the cost are identified and the optimum solution determined.

AB - The increasing desire for using renewable energy sources throughout the world has resulted in a considerable amount of research into and development of concepts for wave energy converters. By now, many different concepts exist, but still, the wave energy sector is not at a stage that is considered commercial yet, primarily due to the relatively high cost of energy. A considerable amount of the wave energy converters are floating structures, which consequently need mooring systems in order to ensure station keeping. Despite being a well-known concept, mooring in wave energy application has proven to be expensive and has a high rate of failure. Therefore, there is a need for further improvement, investigation into new concepts and sophistication of design procedures. This study uses four Danish wave energy converters, all considered as large floating structures, to investigate a methodology in order to find an inexpensive and reliable mooring solution for each device. The study uses a surrogate-based optimization routine in order to find a feasible solution in only a limited number of evaluations and a constructed cost database for determination of the mooring cost. Based on the outcome, the mooring parameters influencing the cost are identified and the optimum solution determined.

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