Hydrodynamic performance and optimization of a pneumatic type spar buoy wave energy converter

Li, Meng; Wu, Rukang; Wu, Botao; Yang, Zehua; Guo, Li

doi:10.1016/j.oceaneng.2022.111334

Cited by 6 publications

(1 citation statement)

References 16 publications

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“…Since the structure of the front and rear air chambers of the dual-chamber OWC model is the same, the same PTO damping is applied to the front and rear air chambers. When the applied aerodynamic PTO damping is equal to the heave radiation damping coefficient, the maximum absorbed power can be obtained (Li et al, 2022). In order to obtain the maximum CWR, the sum of the PTO damping is set as 60 Ns/m, according to the heave radiation damping coefficient of the models A-1.…”

Section: Figurementioning

confidence: 99%

Numerical study on the hydrodynamic performance of a symmetrical dual-chamber oscillating water column wave energy converter

Yang²,

Wu³

et al. 2023

Front. Energy Res.

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In this study, a novel floating oscillating water column (OWC) wave energy converter (WEC) with dual chambers is proposed, and its hydrodynamic performance and primary energy conversion characteristics are investigated by numerical calculation. It consists of a floating body and two long vertical pipes opening downward at the bottom, forming dual chambers at the top. These two rectangular pipes are fixed to the front and back ends of the buoyancy tank with the same width, and it can be regarded as an oscillating single floating body as a whole. Under the action of the incident wave, the WEC captures wave power by the heave motion and relative motion of the pipe and the water column in it to form an oscillating water column, outputting pneumatic power. The geometry size of the vertical pipes is optimized by comparing the hydrodynamic performance and capture width ratio (CWR) of the WEC models with several rectangular pipes of different sizes. The calculation results show that increasing the draft, which is positively correlated with the total mass of the WEC model, increases its optimal response period. By comparing the numerical calculation results of the hydrodynamic performance and CWR of the WEC models with three kinds of floater bottom shapes, semi-cylindrical, sharp-bottomed, and flat-bottomed, it is found that the flat-bottomed model has the best capture performance.

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Section: Figurementioning

confidence: 99%