Machines and Drives Comparison for Low-Power Renewable Energy and Oscillating Applications

Brekken, Ted K. A.; Hapke, Hannes Max; Stillinger, Chad; Prudell, Joe

doi:10.1109/tec.2010.2046641

Cited by 36 publications

(13 citation statements)

References 17 publications

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“…This mechanical interface is used to convert the slow rotational speed or reciprocating motion into high-speed rotational motion for connection to a conventional rotary electrical generator. In this context, attention will be directed at the mechanism needed to convert wave energy into electricity as most building blocks in the generation system remain nearly the same after being transformed into the electrical form [18].…”

Section: Iii2 Wec Main Projectsmentioning

confidence: 99%

An Up-to-Date Technologies Review and Evaluation of Wave Energy Converters

Titah-Benbouzid¹,

Benbouzid²

2015

IREE

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The potential of electric power generation from marine renewable energy is enormous. Ocean waves are being recognized as a resource to be exploited for the sustainable generation of electrical power. The high load factors resulting from the fluid properties and the predictable resource characteristics make ocean waves particularly attractive for power generation and advantageous when compared to other renewable energies. Regarding this emerging and promising area of research, this paper presents a complete review of wave energy technologies describing, analyzing and fixing many of the concepts behind wave energy conversion. The proposed review will specifically highlights the main wave energy conversion projects around the world at different levels (demonstration stage, in production, and commercialized projects). In particular, mooring will be discussed, as it is a key feature behind massive deployment of wave energy converters. Finally, a discussion will highlight challenges that wave energy converters need to overcome to become commercially competitive in the global energy market.

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Section: Iii2 Wec Main Projectsmentioning

confidence: 99%

An Up-to-Date Technologies Review and Evaluation of Wave Energy Converters

Titah-Benbouzid¹,

Benbouzid²

2015

IREE

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“…A key challenge for WEC employing directly driven rotary or linear induction PTO is the high continuous electromagnetic damping that works against the inertial mass motions (relative to a mostly fixed opposing end), which can lead to stalling if inertial forces do not exceed friction thresholds 20 . The PTO mechanism developed in this research alleviates this concern and moreover enhances system performance by combination of a modular multistable design and the use of impulsive dynamics for energy conversion.…”

Section: Pto Mechanism Designmentioning

confidence: 99%

“…For large-scale WECs, these forces are more readily overcome by the momentum of large moving inertia 2 . But for lightweight and mobile WEC, such dissipations are challenging to surmount, particularly to break through the stall forces of friction 20 .…”

Section: Introductionmentioning

confidence: 99%

Multistable chain for ocean wave vibration energy harvesting

2014

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The heaving of ocean waves is a largely untapped, renewable kinetic energy resource. Conversion of this energy into electrical power could integrate with solar technologies to provide for round-the-clock, portable, and mobile energy supplies usable in a wide variety of marine environments. However, the direct drive conversion methodology of gridintegrated wave energy converters does not efficiently scale down to smaller, portable architectures. This research develops an alternative power conversion approach to harness the extraordinarily large heaving displacements and long oscillation periods as an excitation source for an extendible vibration energy harvesting chain. Building upon related research findings and engineering insights, the proposed system joins together a series of dynamic cells through bistable interfaces. Individual impulse events are generated as the inertial mass of each cell is pulled across a region of negative stiffness to induce local snap through dynamics; the oscillating magnetic inertial mass then generates current in a coil which is connected to energy harvesting circuitry. It is shown that linking the cells into a chain transmits impulses through the system leading to cascades of vibration and enhancement of electrical energy conversion from each impulse event. This paper describes the development of the multistable chain and ways in which realistic design challenges were addressed. Numerical modeling and corresponding experiments demonstrate the response of the chain due to slow and large amplitude input motion. Lastly, experimental studies give evidence that energy conversion efficiency of the chain for wave energy conversion is much higher than using an equal number of cells without connections.

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“…al report another comparative study [16], this time among low-power renewable energy conversion applications in the oscillating mode. The authors compare devices that produce power levels of 100 W or less, such as autonomous buoys.…”

Section: Ocean/sea Wave Energy Generators: Research Andmentioning

confidence: 99%

The Development of a Rotational Wave Energy Conversion System: Design and Simulations

Karayaka

Mahlke

Mehrübeoğlu

2011

2011 IEEE Green Technologies Conference (IEEE-Green)

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Electrical power generation by means of renewable energies is becoming a flourishing industry with many researchers focusing on investigating new and effective ways to harness this power. This paper presents a new proposed mechanism for harnessing the potential energy of open ocean waves and the procedures of efficiently converting this energy into electricity. Unlike many of the already proposed designs that utilize linear generators, this paper exposes some light on the idea of rotational conversion using ocean waves to make use of mostreadily available generators. A simple buoy, piston, connecting rod and flywheel system fixed to a platform elevated from the sea level is designed and simulated to track the wave surface for converting the linear motion into rotational motion, which will eventually turn the generator. The results are validated with experimental data collected from a laboratory wave generator.

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Machines and Drives Comparison for Low-Power Renewable Energy and Oscillating Applications

Cited by 36 publications

References 17 publications

An Up-to-Date Technologies Review and Evaluation of Wave Energy Converters

An Up-to-Date Technologies Review and Evaluation of Wave Energy Converters

Multistable chain for ocean wave vibration energy harvesting

The Development of a Rotational Wave Energy Conversion System: Design and Simulations

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