Mathematical modeling of Oyster wave energy converter device

Koley, Santanu; Trivedi, Kshma

doi:10.1063/5.0025237

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…One of the original and best-known bottom-hinged WECs to reach full deployment status was the Oyster [661,603,412,103] (see Figure 1 Exowave [89], is a Danish company that has also developed a type of bottom-fixed flapping WEC. However, their design concept differs in that their devices are smaller and modular in form.…”

Section: Pitchingmentioning

confidence: 99%

Modelling and Optimisation of Wave Energy Converters

Ning¹,

Ding²

2022

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Section: Pitchingmentioning

confidence: 99%

Modelling and Optimisation of Wave Energy Converters

Ning¹,

Ding²

2022

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“…It often equals or is close to the pulse calculated at any peripheral point. Activities that may induce changes are physical exercises, anxieties, sleep, stresses, illnesses, and drug ingestions [7]. The American heart association reported that (60-100) b.p.m is the normal resting adult human heart rate [8].…”

Section: Introductionmentioning

confidence: 99%

The Evaluation of Endotracheal Intubation Effect on Blood Flow Stability Parameters in Baghdad and Gazzi AL-Harriri Hospitals

Mhaibes

2022

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Endotracheal intubation and laryngoscopy have become necessary to provide sufficient airway management, deliver anesthesia and avoid aspiration in anesthetized individuals. Laryngoscopy and intubation have been shown to induce a broad spectrum of stress responses e.g. hypertension and tachycardia. The current study aimed to assess the impact of endotracheal intubation on the pulse rate (P.R) and blood pressure (B.P) during different time intervals of general anesthesia. This study was performed in Baghdad teaching and Gazzi AL-Harriri hospitals during 2019-2020. A total of fifty (50) patients were included in the study; twenty-five (25) were females and twenty-five (25) males with American society of anesthesiologist (ASA) physical status (I & II). The ages of patients ranged between (16-60) years. All patients were administrated (I.V.) Dexamethasone (0.11 mg/kg), Metoclopramide (0.14mg/kg), Ranitidine (0.71mg/kg) & Ketamine (0.5 mg/kg) as premedication. At the induction of anesthesia, patients were administrated (2-3 mg/kg) Propofol as a hypnotic drug and succinylcholine 1 mg/kg as a muscle relaxant. The results revealed a significant increase (p≤0.05) in systolic/ diastolic blood pressure (B.p) at- intubation (135.58 ± 10.29 / 91.74 ± 10.91) and also at 1 minute (132.34 ± 10.08 / 88.58 ± 13.06 ). There was also a significant increase (p≤0.05) in pulse rate (P.R) at-intubation (103.00 ± 18.59).

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“…Lastly, terminators are WECs that produce energy when oriented perpendicular to the direction of the wave propagation. Examples for this category are Wave Dragon (Kofoed et al, 2000), Oyster (Koley and Trivedi, 2020) and PeWEC (Pendulum Wave Energy Converter) (Pozzi et al, 2018). Both terminators and attenuators are also called directional WECs because they produce maximum energy if the wave direction impacts them perpendicularly and parallel, respectively.…”

mentioning

confidence: 99%

On the influence of multidirectional irregular waves on the PeWEC device

2022

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Wave energy is a promising renewable resource for its reliability and power density, and many technological milestones have been achieved. Significant efforts are made to design and optimize Wave Energy Converters (WECs); however, analyses are often limited to simplified conditions. Among such restrictive assumptions, waves are frequently described utilizing monodirectional spectra, thus leading to approximate evaluations, also in terms of absorbed power. In real sea conditions, the waves are multidirectional, and the analysis as a 2D superposition of multiple wave components should be investigated. In particular, linear waves can be analyzed as a sum of sine waves characterized by different amplitudes, frequencies, phases and directions. The case study device analyzed in this paper is PeWEC (Pendulum Wave Energy Converter), a rotating mass device that converts energy based on pitch motion, moored through a spread catenary mooring system. The sea states investigated are those of the island of Cyprus. The spectrum is defined as the combination between the JONSWAP frequency spectrum and the cos-2s directional spectrum. To compute the sea elevation components the Deterministic Amplitude Scheme (DAS) method is used. The forcing acting on the device, the mooring loads and the device motions are examined and compared to quantify the error produced by the monodirectional approximations. The time domain solver OrcaFlex is employed to investigate the interaction of the waves with the moored hull. Compared with the multidirectional analysis, the monodirectional approximation generates an overestimation of the pitch by 5% and of the surge by 3%, highlighting the importance of taking spreading into account if the device is directional.

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Mathematical modeling of Oyster wave energy converter device

Cited by 6 publications

References 8 publications

Modelling and Optimisation of Wave Energy Converters

Modelling and Optimisation of Wave Energy Converters

The Evaluation of Endotracheal Intubation Effect on Blood Flow Stability Parameters in Baghdad and Gazzi AL-Harriri Hospitals

On the influence of multidirectional irregular waves on the PeWEC device

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