Optimization and Annual Average Power Predictions of a Backward Bent Duct Buoy Oscillating Water Column Device Using the Wells Turbine.

Smith, Courtney L.; Bull, Diana L; Willits, Steven M.; Fontaine, Arnold A.

doi:10.2172/1171555

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…No short-term storage was modeled for this device. A number of design studies were conducted which attempted to locate the optimum PCC design for the provided BBDB design [24,5]. These studies included variation of the turbine type, the vent pressure, the turbine radius, the number of turbines, and the power ratings of the VFD and generator.…”

Section: Power Conversion Chain Designmentioning

confidence: 99%

Levelized cost of energy for a Backward Bent Duct Buoy

Bull

Jenne

Smith

et al. 2016

International Journal of Marine Energy

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The Reference Model Project, supported by the U.S. Department of Energy, was developed to provide publically available technical and economic benchmarks for a variety of marine energy converters. The methodology to achieve these benchmarks is to develop public domain designs that incorporate power performance estimates, structural models, anchor and mooring designs, power conversion chain designs, and estimates of the operations and maintenance, installation, and environmental permitting required. The reference model designs are intended to be conservative, robust, and experimentally verified. The Backward Bent Duct Buoy (BBDB) presented in this paper is one of three wave energy conversion devices studied within the Reference Model Project. Comprehensive modeling of the BBDB in a Northern California climate has enabled a full levelized cost of energy (LCOE) analysis to be completed on this device.

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Section: Power Conversion Chain Designmentioning

confidence: 99%

Levelized cost of energy for a Backward Bent Duct Buoy

Bull

Jenne

Smith

et al. 2016

International Journal of Marine Energy

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“…The ballast is distributed to obtain the desired draft and ensure that the center of gravity and the center of buoyancy are aligned vertically. The mass of the PCC (drivetrain, generator, power conditioning electronics) is approximated from the results presented in Smith et al (2014) and is placed at the expected center of the PCC location.…”

Section: Rigid-body Geometriesmentioning

confidence: 99%

An improved understanding of the natural resonances of moonpools contained within floating rigid-bodies: Theory and application to oscillating water column devices

Bull

2015

Ocean Engineering

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a b s t r a c tThe fundamental interactions between waves, a floating rigid-body, and a moonpool that is selectively open to atmosphere or enclosed to purposefully induce pressure fluctuations are investigated. The moonpool hydrodynamic characteristics and the hydrodynamic coupling to the rigid-body are derived implicitly through reciprocity relations on an array of field points. By modeling the free surface of the moonpool in this manner, an explicit hydrodynamic coupling term is included in the equations of motion. This coupling results in the migration of the moonpool's natural resonance frequency from the piston frequency to a new frequency when enclosed in a floating rigid-body. Two geometries that highlight distinct aspects of marine vessels and oscillating water column (OWC) renewable energy devices are analyzed to reveal the coupled natural resonance migration. The power performance of these two OWCs in regular waves is also investigated. The air chamber is enclosed and a three-dimensional, linear, frequency domain performance model that links the rigid-body to the moonpool through a linear resistive control strategy is detailed. An analytic expression for the optimal linear resistive control values in regular waves is presented.

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