Estimation of Cumulative Output Energy of Oscillating Water Column Wave Energy Converter Considering Power Take Off Damping

Iino, Mitsumasa; Miyazaki, Taeko; Iida, Michihisa

doi:10.1115/1.0001030v

Cited by 2 publications

(2 citation statements)

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“…Oscillating water column (OWC) wave energy generators are promising wave energy converters. The efficiency of the OWC device peaks during a resonated wave cycle [78]. However, the efficiency was significantly reduced during other waves.…”

Section: Performance Of Deg Systems and Application Examples Of The Degmentioning

confidence: 98%

Examination of factors to improve the performance of dielectric elastomer transducers and their applications

Chiba,

Waki,

Takeshita

et al. 2024

Smart Mater. Struct.

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Actuators, sensors, and generators using dielectric elastomers are inexpensive and light, and can be easily to structured, multilayer-able, and very efficient. They are　ideal for an eco-energy society. In the latest technology, an only 0.15 g dielectric elastomer can lift an 8 kg weight by 1 mm or more in just 88 ms. the near future, it can be applied to efficient drive systems of humanoid robots, systems that assist in driving the motors of electric vehicles, and various industrial machinery. It is highly likely that very thin and miniaturized dielectric elastomer sensors would also support the driving of motors. In addition, dielectric elastomer generators, which can be applied to various external forces, have attracted significant attention as a renewable energy source. In this paper, we discuss the R&D status of dielectric elastomers using mainly commercially available elastomer materials, give examples of issues, and discuss and their potential applications, and usefulness.The excellent performance of the dielectric elastomers mentioned above is largely due to their carbon-based electrodes. In this study, various carbon materials (including carbon grease, carbon black, MWCNT, and SWCNT) and their dielectric elastomer performances were compared.

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Section: Performance Of Deg Systems and Application Examples Of The Degmentioning

confidence: 98%

Examination of factors to improve the performance of dielectric elastomer transducers and their applications

Chiba,

Waki,

Takeshita

et al. 2024

Smart Mater. Struct.

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show abstract

“…Besides buoy power generation, the existing oscillating water column (OWC) wave energy converter is also commonly considered one of the most effective wave energy converters [69]. The efficiency of OWC devices peaks during the resonant wave period, but drops off significantly during other wave periods.…”

Section: Use Of Wave Power and Water Flowmentioning

confidence: 99%

Possibilities of Artificial Muscles Using Dielectric Elastomers and their Applications

Chiba

Waki²,

Takeshita

et al. 2023

AMR

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The recent developments in dielectric elastomers (DE) are spectacular. Currently, a DE as an actuator, 0.15 g of acrylic sandwiching SWCNT electrodes, is capable of lifting a weight of 8 kg by more than 1 mm at a speed of 88 msec. In the near future, DE motors could be used to drive electric vehicles. Moreover, the DE can be used as a high-efficiency sensor with the same structure. With a diameter of 20 mm and a thickness of 0.5 mm, it can accurately measure pressure from several kg to 150 kg. In addition, reversing this DE actuator (DEA) movement also enables high-efficiency power generation. In other words, when the DEA is stretched or pushed, it generates electric power. Single wall nanotubes (SWCNTs) were used as an electrode, and an acrylic DE power generation cartridge with a diameter of 80 mm was used. When the center of the DE power generation cartridge is pushed by about 15 mm, a power of 33.6 mJ is generated. Using these two DE cartridges, it was possible to charge a secondary battery through a DC converter. In addition to this power generator, practical research and development of power generation using wave power, wind power, waste heat, and fluids (ocean currents, water currents, etc.) is progressing. In this paper, we have described state-of-the-art DEAs, DE generators (including the case that the power generated locally by microgenerators are consumed locally), and DE sensors and explained their usefulness.

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Estimation of Cumulative Output Energy of Oscillating Water Column Wave Energy Converter Considering Power Take Off Damping

Cited by 2 publications

References 0 publications

Examination of factors to improve the performance of dielectric elastomer transducers and their applications

Examination of factors to improve the performance of dielectric elastomer transducers and their applications

Possibilities of Artificial Muscles Using Dielectric Elastomers and their Applications

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