Design, construction, and ocean testing of a taut-moored dual-body wave energy converter with a linear generator power take-off

Elwood, David; Yim, Solomon C.; Prudell, Joe; Stillinger, Chad; Jouanne, Annette von; Brekken, Ted K. A.; Brown, Adam; Paasch, Robert

doi:10.1016/j.renene.2009.04.028

Cited by 125 publications

(49 citation statements)

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“…The company is primarily financed by the US Department of Energy, the US Navy and private investors. To date, CPT has conducted three ocean deployments, testing a first-generation direct-drive point absorber buoy in 2007 [15]. In the autumn of 2008, they deployed a secondgeneration 10 kW device for a total of 5 days that was connected by an electrical umbilical to a power analysis and data acquisition (PADA) system onboard the deployment vessel [16].…”

Section: (B) Columbia Power Technologiesmentioning

confidence: 99%

Wave energy: a Pacific perspective

Paasch

Ruehl

Hovland

et al. 2012

Phil. Trans. R. Soc. A.

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This paper illustrates the status of wave energy development in Pacific rim countries by characterizing the available resource and introducing the region's current and potential future leaders in wave energy converter development. It also describes the existing licensing and permitting process as well as potential environmental concerns. Capabilities of Pacific Ocean testing facilities are described in addition to the region's vision of the future of wave energy.

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Section: (B) Columbia Power Technologiesmentioning

confidence: 99%

Wave energy: a Pacific perspective

Paasch

Ruehl

Hovland

et al. 2012

Phil. Trans. R. Soc. A.

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“…Shoreline wave energy is limited by fewer potential sites and has high installation costs (Amarkartjik et al, 2012, Pizer, 1993. Their deployment costs are very high due to large economy scale of such projects (David et al, 2010). On the other hand, average unit capacity is generally higher for offshore devices as these individual devices can be very effective Harender, 2010, 2102).…”

Section: Introductionmentioning

confidence: 99%

Deep ocean wave energy systems (DOWES): experimental investigations

Chandrasekaran¹,

Raphel

Shree

2014

J. nav. arch. mar. engg.

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“…These power sources can be integrated with buoy systems to minimize the size of batteries, or eliminate the need for batteries if supercapacitors are used. Recently, a significant amount of work has been performed on the design, numerical modeling and field testing of buoy systems to be used as point absorbers to harvest energy from ocean waves [1][2][3][4][5]. A majority of these wave energy converters (WEC) target large amounts of power for grid applications.…”

Section: Introductionmentioning

confidence: 99%

Experimental testing and model validation for ocean wave energy harvesting buoys

Gemme

Bastien

Sepe

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

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Abstract-Methodology and results are presented for numerical simulations and field experiments using point absorption ocean wave energy harvesting buoy systems, using the heave motion of the buoys to produce useful electrical power. Two approaches, a direct-drive system and a resonantdrive system are analyzed. These systems are not designed for large scale grid power applications, but rather for relatively low-power ocean sensor and communications applications, with power requirements in the 1-10 W range. The field experiments provided useful data for model verification and validation purposes. Results showed that RMS values for armature displacement and armature velocity and mean harvested electrical power were generally within 10% between model simulations and experimental data.Index Terms -energy conversion, wave energy harvesting, linear generator, ocean energy, heaving buoy I. NOMENCLATUREA rigid-drive-system is an energy harvesting system which forces the linear generator armature to perfectly track (or mirror) the ocean wave surface elevation without amplification or attenuation of amplitude.A direct-drive-system is an energy harvesting system which attempts to force the linear generator armature to track (or mirror) the ocean wave surface elevation, but is unable to do so perfectly, resulting in attenuation of the amplitude.A resonant-drive-system is an energy harvesting system which allows the linear generator armature and/or the buoy to resonate with, and amplify, the ocean wave surface elevation. II. INTRODUCTIONOcean wave energy harvesting systems, designed for sensor buoys, convert wave motion into electricity, to allow operation under all weather conditions, while enabling enhanced functionality, higher performance and continuous operation. Such systems generate and accumulate energy that can be used to indefinitely power remote buoys, equipped with sensors arrays, as well as electronics for processing and communications. These power sources can be integrated with buoy systems to minimize the size of batteries, or eliminate the need for batteries if supercapacitors are used. Recently, a significant amount of work has been performed on the design, numerical modeling and field testing of buoy systems to be used as point absorbers to harvest energy from ocean waves [1][2][3][4][5]. A majority of these wave energy converters (WEC) target large amounts of power for grid applications. This paper, however, will focus on relatively low-power, distributed, point absorption WEC's and is an extension of preliminary design and numerical modeling work on direct-drive and resonant-drive systems aimed at harvesting power in the 1-10 W range in small sea states for sensor and communication applications [6]. An important contribution of this work was the development of accurate wave-to-wire simulation models that enable optimization of the various energy harvesting systems, while including important sub-system interactions. The theoretical system equations are structured as a nonlinear state-space model with a fini...

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Design, construction, and ocean testing of a taut-moored dual-body wave energy converter with a linear generator power take-off

Cited by 125 publications

References 1 publication

Wave energy: a Pacific perspective

Wave energy: a Pacific perspective

Deep ocean wave energy systems (DOWES): experimental investigations

Experimental testing and model validation for ocean wave energy harvesting buoys

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