Hydrodynamic optimization of the geometry of a sloped-motion wave energy converter

Rodríguez, Claudio A.; Rosa-Santos, Paulo; Taveira-Pinto, Francisco

doi:10.1016/j.oceaneng.2020.107046

Cited by 30 publications

(18 citation statements)

References 35 publications

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“…Cooperative EAs [18] Design & PTOs fully-submerged 1 Hybrid EAs [29] Layout fully-submerged 50, 100 Multi-strategy EAs [30] Design & PTOs heaving WEC 1 Evolutionary and GA [19] PTOs oscillating wave surge converter 1 GA [20,31] Design sloped-motion WEC 1 Heuristic optimization [32] PTOs oscillating water column-based 1 Water cycle algorithm [33] PTOs hinged-type WECs 1 Experimental observations [34] PTOs oscillating wave surge converter 1 GA and ML [35] Layout The CETO6 is a fully-submerged point absorber wave energy converter that is manufactured, installed, and updated by Carnegie Clean Energy Ltd. The prospective location of the WECs array is off the coast of Albany due to its exposure to open ocean wave conditions [58].…”

Section: Objective Wecs Type Wecs Number Methods Year Referencesmentioning

confidence: 99%

A Parametric Study of Wave Energy Converter Layouts in Real Wave Models

et al. 2020

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Ocean wave energy is a broadly accessible renewable energy source; however, it is not fully developed. Further studies on wave energy converter (WEC) technologies are required in order to achieve more commercial developments. In this study, four CETO6 spherical WEC arrangements have been investigated, in which a fully submerged spherical converter is modelled. The numerical model is applied using linear potential theory, frequency-domain analysis, and irregular wave scenario. We investigate a parametric study of the distance influence between WECs and the effect of rotation regarding significant wave direction in each arrangement compared to the pre-defined layout. Moreover, we perform a numerical landscape analysis using a grid search technique to validate the best-found power output of the layout in real wave models of four locations on the southern Australian coast. The results specify the prominent role of the distance between WECs, along with the relative angle of the layout to dominant wave direction, in harnessing more power from the waves. Furthermore, it is observed that a rise in the number of WECs contributed to an increase in the optimum distance between converters. Consequently, the maximum exploited power from each buoy array has been found, indicating the optimum values of the distance between buoys in different real wave scenarios and the relative angle of the designed layout with respect to the dominant in-site wave direction.

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Section: Objective Wecs Type Wecs Number Methods Year Referencesmentioning

confidence: 99%

A Parametric Study of Wave Energy Converter Layouts in Real Wave Models

et al. 2020

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“…Over the last five years, extensive research has been conducted to refine the original CECO design. First, the shape and mass of the LMMs have been optimised to improve the hydrodynamic response of CECO [52,53] and, consequently, increase the power absorption for a wider range of wave conditions [42]. Furthermore, it was found that both the PTO damping [54] and inclination [55] also play a predominant role in CECO's response.…”

Section: Co-located Wave-wind Farm 221 Energy Conversion Technologiesmentioning

confidence: 99%

Assessing the Effectiveness of a Novel WEC Concept as a Co-Located Solution for Offshore Wind Farms

Ramos

Giannini

Calheiros-Cabral

et al. 2022

JMSE

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The combined exploitation of wave and offshore wind energy resources is expected to improve the cost competitiveness of the wave energy industry as a result of shared capital and operational costs. In this context, the objective of this work is to explore the potential benefits of co-locating CECO, an innovative wave energy converter, with the commercial WindFloat Atlantic wind farm, located on the northern coast of Portugal. For this purpose, the performance of the combined farm was assessed in terms of energy production, power smoothing and levelised cost of energy (LCoE). Overall, the co-located farm would increase the annual energy production by approximately 19% in comparison with the stand-alone wind farm. However, the benefits in terms of power output smoothing would be negligible due to the strong seasonal behaviour of the wave resource in the area of study. Finally, the LCoE of the co-located farm would be drastically reduced in comparison with the stand-alone wave farm, presenting a value of 0.115 per USD/kWh, which is similar to the levels of the offshore wind industry as of five years ago. Consequently, it becomes apparent that CECO could progress more rapidly towards commercialisation when combined with offshore wind farms.

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“…The block formed by the central frame connected to the two LMMs oscillates along an inclined direction of motion, Figure 16b. Different scaled models (1:20-25) of CECO were constructed and tested at the wave basin of the Hydraulics Laboratory of the Faculty of Engineering of the University of Porto [35][36][37]. As envisioned for the real-scale design, the frame motions activate the PTO system enclosed into a fixed or floating supporting structure [38,39].…”

Section: Case Study 3: Ceco Experimental Pto Physical Modelmentioning

confidence: 99%

Wave Energy Converter Power Take-Off System Scaling and Physical Modelling

Giannini

Temiz

Rosa-Santos

et al. 2020

JMSE

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Absorbing wave power from oceans for producing a usable form of energy represents an attractive challenge, which for the most part concerns the development and integration, in a wave energy device, of a reliable, efficient and cost-effective power take-off mechanism. During the various stages of progress, for assessing a wave energy device, it is convenient to carry out experimental testing that, opportunely, takes into account the realistic behaviour of the power take-off mechanism at a small scale. To successfully replicate and assess the power take-off, good practices need to be implemented aiming to correctly scale and evaluate the power take-off mechanism and its behaviour. The present paper aims to explore and propose solutions that can be applied for reproducing and assessing the power take-off element during experimental studies, namely experimental set-ups enhancements, calibration practices, and error estimation methods. A series of recommendations on how to practically organize and carry out experiments were identified and three case studies are briefly covered. It was found that, despite specific options that can be strictly technology-dependent, various recommendations could be universally applicable.

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Hydrodynamic optimization of the geometry of a sloped-motion wave energy converter

Cited by 30 publications

References 35 publications

A Parametric Study of Wave Energy Converter Layouts in Real Wave Models

A Parametric Study of Wave Energy Converter Layouts in Real Wave Models

Assessing the Effectiveness of a Novel WEC Concept as a Co-Located Solution for Offshore Wind Farms

Wave Energy Converter Power Take-Off System Scaling and Physical Modelling

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