Reliability and O&amp;M sensitivity analysis as a consequence of site specific characteristics for wave energy converters

Gray, Anthony; Dickens, Beth; Bruce, Tom; Ashton, Ian; Johanning, Lars

doi:10.1016/j.oceaneng.2017.06.043

Cited by 27 publications

(12 citation statements)

References 13 publications

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“…A second step toward identifying sites for WEC placement typically involves an availability analysis [4,24] because of the advantages and reduced costs associated with having fair weather conditions; for deployment, maintenance, and removal of equipment from sites. The reliability of wave energy converters to not break in certain wave conditions is also very important [25] as the equipment needs to be built to handle the loads and forces involved. To maintain a good profitability, they should not be over-dimensioned far outside the range of what extreme metocean conditions reasonably can occur for the basin in which they will be deployed.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Extreme and Metocean Conditions in the Swedish Exclusive Economic Zone for Wave Energy

et al. 2020

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Here, accessibility to near-shore and offshore marine sites is evaluated based on wave and ice conditions. High-resolution third-generation wave model results are used to examine the operation and maintenance conditions for renewable energy sources with a focus on wave energy. Special focus is given to the wave field and ice characteristics for areas within the Swedish Exclusive Economic Zone including analysis of return levels for extreme values for significant wave height, which provides guidance for dimensioning wave energy converters. It is shown that the number of weather windows and accessibility are influenced by distance from the coast and sea-ice conditions. The longest waiting periods for the closest weather window that is available for Operation and Maintenance (O&M) is in ice-free conditions shown to be strongly correlated with the fetch conditions. The sheltered Baltic Sea is shown to have very high accessibility if marine infrastructure and vessels are designed for access limits of significant wave height up to 3 m. In the northern basins, the waiting periods increase significantly, if and when the ice-conditions are found to be critical for the O&M activity considered. The ice-conditions are examined based on compiled operational sea-ice data over a climatic time period of 34 years. The results are location specific for the Swedish Exclusive Economic Zone, but the analysis methods are transferable and applicable to many other parts of the world, to facilitate assessment of the most promising areas in different regions.

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Section: Introductionmentioning

confidence: 99%

Assessment of Extreme and Metocean Conditions in the Swedish Exclusive Economic Zone for Wave Energy

et al. 2020

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“…BioFREE frames may provide rigorous in situ studies of both biofouling and coating performance necessary for their evaluation in high-tidal flow and extreme wave conditions world-wide. When combined with a greater understanding of biofouling processes in these environments, developers can use wider project design and operational strategies to avoid and minimise impacts (Morandeau et al 2013;Gray et al 2017), and avoiding operational costs associated with reactive maintenance and servicing of devices (EMEC 2014;Topper et al 2019). Avoiding periods of major settlement, and timing cleaning operations to maximise removal of the most problematic foulants, may form part of an effective scheduling strategy to minimise the consequences from fouling.…”

Section: Discussionmentioning

confidence: 99%

Sea-trial verification of a novel system for monitoring biofouling and testing anti-fouling coatings in highly energetic environments targeted by the marine renewable energy industry

et al. 2021

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“…Another important consideration for operation and maintenance planning activity is the accessing of the facility if it is offshore [177][178][179][180][181]. The experience gained from the offshore energy industry including offshore wind and oil and gas industries [182] can help to appreciate the risks and costs associated with maintaining an offshore facility.…”

Section: Design Installation and Operationmentioning

confidence: 99%

Ocean Wave Energy Converters: Status and Challenges

2018

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Wave energy is substantial as a resource, and its potential to significantly contribute to the existing energy mix has been identified. However, the commercial utilization of wave energy is still very low. This paper reviewed the background of wave energy harvesting technology, its evolution, and the present status of the industry. By covering the theoretical formulations, wave resource characterization methods, hydrodynamics of wave interaction with the wave energy converter, and the power takeoff and electrical systems, different challenges were identified and discussed. Solutions were suggested while discussing the challenges in order to increase awareness and investment in wave energy industry as a whole.

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Reliability and O&M sensitivity analysis as a consequence of site specific characteristics for wave energy converters

Cited by 27 publications

References 13 publications

Assessment of Extreme and Metocean Conditions in the Swedish Exclusive Economic Zone for Wave Energy

Assessment of Extreme and Metocean Conditions in the Swedish Exclusive Economic Zone for Wave Energy

Sea-trial verification of a novel system for monitoring biofouling and testing anti-fouling coatings in highly energetic environments targeted by the marine renewable energy industry

Ocean Wave Energy Converters: Status and Challenges

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