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J. Mar. Sci. Eng. 2015, 3(4), 1349-1361; doi:10.3390/jmse3041349

Reducing Reliability Uncertainties for Marine Renewable Energy

University of Exeter, Penryn Campus, Cornwall, TR10 9FE, UK
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Academic Editor: Bjoern Elsaesser
Received: 28 August 2015 / Accepted: 26 October 2015 / Published: 5 November 2015
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Abstract

Technology Readiness Levels (TRLs) are a widely used metric of technology maturity and risk for marine renewable energy (MRE) devices. To-date, a large number of device concepts have been proposed which have reached the early validation stages of development (TRLs 1–3). Only a handful of mature designs have attained pre-commercial development status following prototype sea trials (TRLs 7–8). In order to navigate through the aptly named “valley of death” (TRLs 4–6) towards commercial realisation, it is necessary for new technologies to be de-risked in terms of component durability and reliability. In this paper the scope of the reliability assessment module of the DTOcean Design Tool is outlined including aspects of Tool integration, data provision and how prediction uncertainties are accounted for. In addition, two case studies are reported of mooring component fatigue testing providing insight into long-term component use and system design for MRE devices. The case studies are used to highlight how test data could be utilised to improve the prediction capabilities of statistical reliability assessment approaches, such as the bottom–up statistical method. View Full-Text
Keywords: component reliability testing; “valley of death”; reliability uncertainties component reliability testing; “valley of death”; reliability uncertainties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Weller, S.D.; Thies, P.R.; Gordelier, T.; Johanning, L. Reducing Reliability Uncertainties for Marine Renewable Energy. J. Mar. Sci. Eng. 2015, 3, 1349-1361.

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