Experimental testing and model validation for ocean wave energy harvesting buoys

Gemme, Douglas A.; Bastien, Steven P.; Sepe, R.B.; Montgomery, John; Grilli, Stéphan T.; Grilli, Annette R.

doi:10.1109/ecce.2013.6646720

Cited by 9 publications

(7 citation statements)

References 9 publications

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“…However, collectively, the energy conversion benefits from highly energetic bistable switching, the ability to excite impulses from much lower amplitude input motions, and the beneficial modular design provide the multistable PTO chain a critical ability to convert electrical power from progressively smaller input energies (wave motions). This factor is indeed a great challenge for directly driven PTO in which case the minimum energy barrier is related to sliding armature or generator friction and the large electromagnetic damping, which often lead to fairly massive designs to compensate for the dissipations through increased inertial influences 19 .…”

Section: Pto Mechanism Designmentioning

confidence: 99%

“…Fewer investigations have focused on mobile WEC platforms for low-power applications. Portable WECs using directly driven PTO based on proprietary transmissions with rotary generators [13][14][15] and linear electromagnetic induction [16][17][18][19] have been recently explored. In these studies, average power generation spanning around 0.01-100 W has been numerically and experimentally demonstrated.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Pto Mechanism Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multistable chain for ocean wave vibration energy harvesting

2014

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“…Gemme et al [70] manufactured 1:4 prototypes of both direct-drive-system and resonant-drive-system to verify their "wave-to-wire" numerical model. They use a person's high-sized floats, using hollow cylinders or balls as a source of welfare.…”

Section: Large-and Medium-scale Energy Harvesters Of Liquid Flowmentioning

confidence: 99%

Capturing Flow Energy from Ocean and Wind

et al. 2019

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Flow-induced energy harvesting has attracted more and more attention among researchers in both fields of the wind and the fluid. Piezoelectric energy harvesters and triboelectric nanogenerators are exploited to obtain superior performance and sustainability, and the electromagnetic conversion has been continuously improved in the meantime. Aiming at different circumstances, researchers have designed, manufactured, and tested a variety of energy harvesters. In this paper, we analyze the state-of-the-art energy harvesting techniques and categorize them based on the working environment, application targets, and energy conversion mechanisms. The trend of research endeavors is analyzed, and the advantages, existing problems of energy harvesters, and corresponding solutions of energy harvesters are assessed.Energies 2019, 12, 2184 2 of 22 pose a potential threat to human health. The environmental threat is more obvious for one-off batteries, which are not intended for replacement and recycling, resulting in appreciable pollution problems [13]. Harvesting energy from the environment instead of carrying a chemical battery around is safer, undoubtedly, for both humans and the nature. Safety and universality make environmental energy harvesting an attractive topic. Relatively speaking, energy harvesting has advantages, as follows: (a) Battery-less operations are feasible, (b) embedded systems are easy to wire, (c) the infrastructure is easy to retrofit, (d) labor is saved, or "fit and forget" [14], and (e) the equipment is lightweight. Some long-term monitor systems with low power consumption, such as sensors for building structure health detection, body information collection, and low-energy self-maintenance systems [15] usually need long-term stable energy supply. In practical applications, ocean climate detectors have an option to take advantage of the ocean by using tidal energy or wave energy, and bridge safety monitors can be recharged by wind flow to suit local conditions. Thus, ubiquitous flow energy provides a good energy harvesting option toward self-powered systems.Energy harvesting from flow environments flourishes with the development of the energy industry along the general trend. Various forms of flow energy, such as wave, tidal, water current, wind flow have been exploited and utilized [16]. The mass level of large flow energy harvester can reach 2 × 10 5 kg, where the energy harvesting magnitude can reach 18.2 KW [17]. Flow energy harvesters can also be minimized as small as a few centimeters and indicate energy harvesting density as 1-10 mW [18,19]. A variety of energy harvesters have been developed based on different energy conversion mechanisms. Among them, the large-scale electromagnetic energy harvester relies on large generators, suffering from complex structures [20]. The approach can produce energy in large magnitudes and can generate electricity feeding the grid for the industrial production process and daily life use. As for triboelectric nanogenerators (TENG) and piezoelectric energy harvesters ...

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“…A number of LGs used in wave power with different specifications are found in the literature [1][2][3][4][5][6][7][8][9][10][11]. The power and input voltage ratings are chosen as per the LG ratings given in References [2,33].…”

Section: Selection Of Voltage and Power Ratingsmentioning

confidence: 99%

“…The following wave-energy conversion technologies are reported in the literature: (i) attenuator, (ii) oscillating water column, (iii) overtopping, and (iv) point absorber. Among these technologies, one of the point-absorber type of devices, called Archimedes wave swing (AWS), is currently the most attractive device [8][9][10]. AWS uses a direct-drive linear generator (LG) to convert its reciprocating motion into electricity [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

A 10 kW ZVS Integrated Boost Dual Three-Phase Bridge DC–DC Resonant Converter for a Linear Generator-Based Wave-Energy System: Design and Simulation

Harischandrappa

Bhat

2019

Electronics

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The design and performance analysis of a 10 kW three-phase DC–DC LCL-type resonant converter having a built-in boost function were carried out. This high-power converter is proposed for its application in grid-interfacing a linear generator (LG)-based wave-energy system. Fixed-frequency control is used, and the converter was designed to operate with a lagging power factor. It is shown that all switches turn on with zero-voltage switching (ZVS) for wide input voltage and load variations. This results in reduced switching losses and stresses, which is very important in large-power applications. The performance of the converter was studied through PSIM simulation software. Theoretical and simulation results are presented for comparison. Power-loss break-down analysis of the designed converter was carried out and the summary of results is presented.

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Experimental testing and model validation for ocean wave energy harvesting buoys

Cited by 9 publications

References 9 publications

Multistable chain for ocean wave vibration energy harvesting

Multistable chain for ocean wave vibration energy harvesting

Capturing Flow Energy from Ocean and Wind

A 10 kW ZVS Integrated Boost Dual Three-Phase Bridge DC–DC Resonant Converter for a Linear Generator-Based Wave-Energy System: Design and Simulation

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