Test results of a 30 kW self-rectifying biradial air turbine-generator prototype

Carrelhas, A.A.D.; Gato, L.M.C.; Henriques, J.C.C.; Falcão, A.F.O.; Varandas, J.

doi:10.1016/j.rser.2019.04.008

Cited by 41 publications

(33 citation statements)

References 16 publications

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“…The OWC's PTO system considered was a biradial turbine [39] because of its high peak and time-averaged efficiency [40], as well as its wide operational flow range [27]. As the biradial turbine has a quadratic relationship between the flow rate and the pressure [40], which is the same as for an orifice plate, it was modeled using the diaphragm from a Canon photographic camera lens, Figure 6.…”

Section: Physical Modelmentioning

confidence: 99%

Performance Assessment of a Hybrid Wave Energy Converter Integrated into a Harbor Breakwater

et al. 2020

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Seaports are highly energy demanding infrastructures and are exposed to wave energy, which is an abundant resource and largely unexploited. As a result, there has been a rising interest in integrating wave energy converters (WEC) into the breakwaters of seaports. The present work analyzes the performance of an innovative hybrid WEC module combining an oscillating water column (OWC) and an overtopping device (OWEC) integrated into a rubble mound breakwater, based on results of a physical model study carried out at a geometrical scale of 1:50. Before the experimental tests, the device’s performance was numerically optimized using ANSYS Fluent and WOPSim v3.11. The wave power captured by the hybrid WEC was calculated and the performance of the two harvesting principles discussed. It was demonstrated that hybridization could lead to systems with higher efficiencies than its individual components, for a broader range of wave conditions. The chosen concepts were found to complement each other: the OWEC was more efficient for the lower wave periods tested and the OWC for the higher. Consequently, the power production of the hybrid WEC was found to be less dependent on the wave’s characteristics.

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Section: Physical Modelmentioning

confidence: 99%

Performance Assessment of a Hybrid Wave Energy Converter Integrated into a Harbor Breakwater

et al. 2020

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“…Tidal barrage power plants use the difference in the height of the water surface during ebbs and There are different types of PTO systems adopted for different WEC devices, e.g., pneumatic [94,95], hydraulic [96][97][98][99], direct mechanical drive [100][101][102], and direct electrical drive [103][104][105]. An elaborated description of these systems can be found in [106][107][108].…”

Section: Tidal Range Energy Conversionmentioning

confidence: 99%

“…Others, describing concepts different from the above categories, e.g., the wave carpet [91] and the rotating mass [92,93], which uses the motion of a hull to accelerate and maintain the revolutions of a spinning mass inside. There are different types of PTO systems adopted for different WEC devices, e.g., pneumatic [94,95], hydraulic [96][97][98][99], direct mechanical drive [100][101][102], and direct electrical drive [103][104][105]. An elaborated description of these systems can be found in [106][107][108].…”

mentioning

confidence: 99%

Ocean Renewable Energy Potential, Technology, and Deployments: A Case Study of Brazil

Shadman

Silva

Faller³

et al. 2019

Energies

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This study, firstly, provides an up-to-date global review of the potential, technologies, prototypes, installed capacities, and projects related to ocean renewable energy including wave, tidal, and thermal, and salinity gradient sources. Secondly, as a case study, we present a preliminary assessment of the wave, ocean current, and thermal gradient sources along the Brazilian coastline. The global status of the technological maturity of the projects, their different stages of development, and the current global installed capacity for different sources indicate the most promising technologies considering the trend of global interest. In Brazil, despite the extensive coastline and the fact that almost 82% of the Brazilian electricity matrix is renewable, ocean renewable energy resources are still unexplored. The results, using oceanographic fields produced by numerical models, show the significant potential of ocean thermal and wave energy sources in the northern and southern regions of the Brazilian coast, which could contribute as complementary supply sources in the national electricity matrix.

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“…Amongst the WECs projects in Spain, we note NEREIDA wave power plant in Mutriku which was installed by the Basque Energy Agency (EVE) since 2011 and is the first OWC establishment performing like a test-rig for technology developers [11], [12], MARMOK-A-5 as the earliest operating grid-connected floating OWC which was developed in Oceantec in Bilbao and then acquired by IDOM in 2016 [13], WEP+ created in Wedge Global and had 5-years testing in the PLOCAN test-facility of the Canary Islands [7] and LifeDemoWave which is a project testing an unconnected 25kW prototype in the Galician-coast since 2018 [14].…”

Section: Introductionmentioning

confidence: 99%

Fuzzy Gain Scheduled-Sliding Mode Rotational Speed Control of an Oscillating Water Column

M’zoughi

Garrido

et al. 2020

IEEE Access

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The generated power of Oscillating Water Columns (OWC) based on Wells turbines is limited due to the stalling behavior. Therefore, this paper presents the modeling of an OWC and a rotational speed control using a novel Fuzzy Gain Scheduled-Sliding Mode controller (FGS-SMC) for a stalling-free operation. The proposed SMC-rotational speed control will regulate the turbo-generator angular velocity to avoid the stalling behavior and increase the generated power. In an effort to reduce the fluctuations in the generated power, Fuzzy Logic Supervisors (FLS) were designed to adaptively schedule the switching gains of the SMC controller to reduce the chattering and improve its performance. A comparative study has been carried out between the FGS-SMC, the SMC and uncontrolled OWC using irregular waves and real measured waves. Results show the effectiveness of the proposed controls against the uncontrolled case and the superior performance of FGS-SMC over the SMC ensuring power generation improvement.INDEX TERMS Back-to-back converter, fuzzy gain scheduling (FGS), sliding mode control (SMC), oscillating water column (OWC), power generation, stalling behavior, wave energy, wells turbine.

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Test results of a 30 kW self-rectifying biradial air turbine-generator prototype

Cited by 41 publications

References 16 publications

Performance Assessment of a Hybrid Wave Energy Converter Integrated into a Harbor Breakwater

Performance Assessment of a Hybrid Wave Energy Converter Integrated into a Harbor Breakwater

Ocean Renewable Energy Potential, Technology, and Deployments: A Case Study of Brazil

Fuzzy Gain Scheduled-Sliding Mode Rotational Speed Control of an Oscillating Water Column

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Test results of a 30 kW self-rectifying biradial air turbine-generator prototype

Cited by 41 publications

References 16 publications

Performance Assessment of a Hybrid Wave Energy Converter Integrated into a Harbor Breakwater

Performance Assessment of a Hybrid Wave Energy Converter Integrated into a Harbor Breakwater

Ocean Renewable Energy Potential, Technology, and Deployments: A Case Study of Brazil

Fuzzy Gain Scheduled-Sliding Mode Rotational Speed Control of an Oscillating Water Column

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Product

Resources

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Test results of a 30 kW self-rectifying biradial air turbine-generator prototype