An experimental study on the efficiency of the submerged plate wave energy converter

Örer, Gürkan; Özdamar, Aydoğan

doi:10.1016/j.renene.2006.06.008

Cited by 58 publications

(37 citation statements)

References 5 publications

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“…This mechanism has the same frequency as the incoming wave, and does not allow wave transmission. Under the plate we can observe a rather strong flow, and some authors suggested using such current for electric power generation (see, e.g., Graw, 1993;Orer and Ozdamar, 2007). The results obtained by second order simulation give additional insight on this configuration.…”

Section: The Flat Plate Breakwater: Linear and Nonlinear Computationsmentioning

confidence: 67%

Analysis of linear and nonlinear features of a flat plate breakwater with the boundary element method

Lalli

Bruschi

Liberti

et al. 2012

Journal of Fluids and Structures

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Section: The Flat Plate Breakwater: Linear and Nonlinear Computationsmentioning

confidence: 67%

Analysis of linear and nonlinear features of a flat plate breakwater with the boundary element method

Lalli

Bruschi

Liberti

et al. 2012

Journal of Fluids and Structures

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“…The maximum error in the determination of the effective rotational speed is estimated about 2.5%, while it is estimated to be about 1.8%, and 4.5% for the effective torque, and power, respectively. The effective overall efficiency, h eff of the present Savonius type rotor system can be determined with the following formula [21]:…”

Section: Experimental Methodologymentioning

confidence: 99%

Performance analysis of a horizontal axis 3-bladed Savonius type wave turbine in an experimental wave flume (EWF)

Tutar

Veci

2016

Renewable Energy

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a b s t r a c tThe present experimental study investigates the generation and propagation of regular water waves and their interactions with an in-house fabricated horizontal-axis 3-bladed Savonius rotor in an experimental wave flume (EWF) equipped with a piston-type wave maker with active absorption capability to assess the rotor performance for different parametric conditions namely, wave height, wave period and submergence level in intermediate-to-shallow water depths. The motion of the wave particles around the Savonius rotor is observed during the experiments as well as measuring the power and torque performance of the rotor to make a reliable assessment of the water movement with the rotor positioning for different inflow wave boundary conditions. The wave-to-mechanical energy conversion efficiency (ECE) of the present device is determined for each case to suggest a possible optimum positioning accompanied with optimum wave heights and frequencies for the manufactured small scale prototype. The present results suggest that experimental solutions within the wave flume can provide a proper guideline for performance analysis of such devices in intermediate-to-shallow water depths for further studies of optimization of design of Savonius rotor type sea and/or ocean wave energy conversion devices for different operating conditions provided that optimum physical flow conditions are satisfied.

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“…When a regular wave is given in the wave channel, wave power P wave is calculated by the following equation [14]:…”

Section: Efficiency Analysis Of the Ddtmentioning

confidence: 99%

“…However, a suitable turbine type for the OWC is not generalized yet because of relatively low efficiency and high flow induced noise by the OWC turbine systems. Therefore, the direct drive hydro turbine (DDT) type converter, which uses the water flow in the turbine passage as working fluid, has been introduced to improve the turbine performance because water flow has a higher energy density compared to that of air flow [13][14][15][16]. Therefore, this study investigates the performance of a newly developed direct drive hydro turbine (DDT) for wave energy converter.…”

Section: Introductionmentioning

confidence: 99%

A performance study on a direct drive hydro turbine for wave energy converter

Choi

Kim²,

Kim³

et al. 2010

J Mech Sci Technol

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Clean and renewable energy technologies using ocean energy give us non-polluting alternatives to fossil-fueled power plants as a countermeasure against global warming and growing demand for electrical energy. Among the ocean energy resources, wave power takes a growing interest because of its enormous amount of potential energy in the world. Therefore, various types of wave power systems to capture the energy of ocean waves have been developed. However, a suitable turbine type is not yet normalized because of relatively low efficiency of the turbine systems. The purpose of this study is to investigate the performance of a newly developed direct drive hydro turbine (DDT), which will be built in a caisson for a wave power plant. Experiment and CFD analysis are conducted to clarify the turbine performance and internal flow characteristics. The results show that the DDT obtains fairly good turbine efficiency in cases with and without wave conditions. Most of the output power is generated at the runner passage of Stage 2. Relatively larger amount of the decreased tangential velocity at Stage 2 produces more angular momentum than that at Stage 1 and thus, the larger angular momentum at the Stage 2 makes a greater contribution to the generation of total output power in comparison with that at Stage 1. Large vortex existing in the upper-left region of the runner passage forms a large recirculation region in the runner passage, and the recirculating flow consumes the output power at Region 2.

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An experimental study on the efficiency of the submerged plate wave energy converter

Cited by 58 publications

References 5 publications

Analysis of linear and nonlinear features of a flat plate breakwater with the boundary element method

Analysis of linear and nonlinear features of a flat plate breakwater with the boundary element method

Performance analysis of a horizontal axis 3-bladed Savonius type wave turbine in an experimental wave flume (EWF)

A performance study on a direct drive hydro turbine for wave energy converter

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