Downscaling wave energy converters for optimum performance in low-energy seas

Majidi, Ajab Gul; Bingölbali, Bilal; Akpınar, Adem; Iglesias, G.; Jafali, Halid

doi:10.1016/j.renene.2020.12.092

Cited by 23 publications

(8 citation statements)

References 21 publications

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“…These power matrices were obtained by applying the method described by Payne [46] and applied in a series of investigations dealing with the scaling of WEC to local sea states [47][48][49][50][51] Thus, following this approach, the original power matrix of a given technology was scaled for different sizes of devices by assuming that the Froude number remained constant between small-scaled prototypes. Thus, according to Froude scaling law, wave heights were scaled linearly with the geometric scale λ, wave periods with the square root of λ and power as λ 3.5 .…”

Section: Assessment Based On Small-scale Prototypesmentioning

confidence: 99%

“…Majidi Nezhad et al [50] exploited this method to evaluate the performance of four technologies, including Wave Star, Oyster, Wave Dragon and Archimedes Wave Swing, on the west coast of Sicily (Italy). More recently, Majidi et al [49] evaluated the performance of 15 WECs in different water depths along the southwestern coast of the Black Sea.…”

Section: Assessment Based On Small-scale Prototypesmentioning

confidence: 99%

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Wave Energy Resource Assessment for Small-Scale WEC near a Harbour

Guillou

Chapalain

Sergent

2022

JMSE

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Accurate evaluations of the available and technically exploitable wave energy resources are fundamental to optimise the design and implementation of energy converters in the marine environment. However, long-term resource assessments have been primarily conducted for large-scale devices in offshore energetic locations, thus ignoring onshore sites such as harbours with easier access, installation and accessibility to devices. Here, we conducted a ten-year evaluation of the performance of wave energy converters (WECs) off Roscoff harbour (northern Brittany, France). As the site of application shows moderately energetic conditions, particular attention was dedicated to small-scale WECs by adapting ratings to the local wave climate. This investigation combined (i) a high-spatial resolution (~5 m) hindcast database established with SWAN with (ii) generic and specific assessments of WEC performance. We exploited, in particular, scaled power matrices derived from the Oyster technology to assess the capacity factors and energy output of devices. In addition to characterising the annual and seasonal variability of the available resource off the harbour breakwater, this investigation provided further insights for optimising WECs, including experimental prototypes. It is therefore suggested that this type of evaluation be considered for the assessment of small- and/or full-scale energy converters in the marine environment.

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Section: Assessment Based On Small-scale Prototypesmentioning

confidence: 99%

Section: Assessment Based On Small-scale Prototypesmentioning

confidence: 99%

Wave Energy Resource Assessment for Small-Scale WEC near a Harbour

Guillou

Chapalain

Sergent

2022

JMSE

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“…The basic idea of the Laplace index method is to expand the variability of each information variable. In the calculation, one information variable is used as a frequency and the other is used as a variable, and each independent variable is changed by considering the variable value of the variable to exert a defined effect [18][19].…”

Section: Lamin Index Decomposition Methodsmentioning

confidence: 99%

Factor Analysis Method and Application of Energy Consumption Intensity Variation

2022

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The rapid growth of my country's economy has led to a continuous increase in energy consumption (EC). Although the growth rate of EC has declined in recent years, the problems of resource utilization and environmental pollution caused by high EC have not yet been identified. For a long time, China's economy has been balancing emission reductions between reducing EC and achieving sustainable economic growth. To this end, the text specifically analyzes the factors that lead to changes in EC and energy intensity (EI), and the corresponding method applications. This paper analyzes the factors that affect the intensity of EC, and uses the LMDI method to study the changes in EC by collecting industrial added value, EC and GDP in various sectors. If we analyze the experimental results, we can know that: in the overall economic situation, it is found that the contribution rate of economic activity is 182.25%, the contribution rate of EI is 77.83%, and the contribution rate of economic structure is 3.45%.

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“…In previous studies investigating the scaling of WECs, the impact of sizing on the PTO efficiency is not considered [17], [18]. However, the results given in Fig.…”

Section: B Influence Of Sizing On the Generator Efficiencymentioning

confidence: 99%

The Influence of Linear Permanent Magnet Generator Sizing on the Techno-Economic Performance of a Wave Energy Converter

Tan

Wang

Laguna

et al. 2021

2021 13th International Symposium on Linear Drives for Industry Applications (LDIA)

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Downsizing the Power Take-off (PTO) rating has been proven to be beneficial for decreasing the Levelized Cost of Energy (LCOE) of wave energy converters (WECs). However, the linear permanent magnet (PM) generator has not yet been modelled and optimized in detail in previous feasibility studies. This paper extends the study of the PTO downsizing to further investigate the influence of the linear PM generator sizing on a WEC's techno-economic performance. The generator is sized for providing different maximum forces, and the effect of sizing on the generator performance is presented. The efficiency map of the selected linear generator design is applied to evaluate the annual energy production (AEP) and finally identify its influence on the techno-economic performance of a WEC.

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Downscaling wave energy converters for optimum performance in low-energy seas

Cited by 23 publications

References 21 publications

Wave Energy Resource Assessment for Small-Scale WEC near a Harbour

Wave Energy Resource Assessment for Small-Scale WEC near a Harbour

Factor Analysis Method and Application of Energy Consumption Intensity Variation

The Influence of Linear Permanent Magnet Generator Sizing on the Techno-Economic Performance of a Wave Energy Converter

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