Ultra-low wind speed piezoelectric windmill

Ravi Anant Kishore; Dušan Vučković; Shashank Priya

doi:10.1080/00150193.2014.875315

Ultra-low wind speed piezoelectric windmill

Ravi Anant Kishore, Dušan Vučković, Shashank Priya

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

We report an ultra-low start-up speed windmill that consists of a 72 mm diameter horizontal axis wind turbine rotor with 12 alternating polarity magnets around its periphery and a 60 mm × 20 mm × 0.7 mm piezoelectric bimorph element having a magnet at its tip. This wind turbine operates at very low Reynolds number of around 2×10⁴, but still it has reasonably high power coefficient of about 11% at the optimal tip speed ratio of 0.7. It was found to produce peak electric power of 450 μW at the rated wind speed of 4.2 mph. An extremely low start-up wind speed of 2.4 mph was achieved by operating the bimorph in actuator mode.

Original language	English (US)
Pages (from-to)	98-107
Number of pages	10
Journal	Ferroelectrics
Volume	460
Issue number	1
DOIs	https://doi.org/10.1080/00150193.2014.875315
State	Published - Feb 17 2014
Externally published	Yes

Bibliographical note

Funding Information:
The authors gratefully acknowledge the financial support provided by NIST program and NSF I/UCRC: Center for Energy Harvesting Materials and Systems (CEHMS).

Keywords

low wind speed
micro wind turbine
Piezoelectricity
renewable energy
wind energy

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1080/00150193.2014.875315

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abstract = "We report an ultra-low start-up speed windmill that consists of a 72 mm diameter horizontal axis wind turbine rotor with 12 alternating polarity magnets around its periphery and a 60 mm × 20 mm × 0.7 mm piezoelectric bimorph element having a magnet at its tip. This wind turbine operates at very low Reynolds number of around 2×104, but still it has reasonably high power coefficient of about 11% at the optimal tip speed ratio of 0.7. It was found to produce peak electric power of 450 μW at the rated wind speed of 4.2 mph. An extremely low start-up wind speed of 2.4 mph was achieved by operating the bimorph in actuator mode.",

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AU - Kishore, Ravi Anant

AU - Vučković, Dušan

AU - Priya, Shashank

N1 - Funding Information: The authors gratefully acknowledge the financial support provided by NIST program and NSF I/UCRC: Center for Energy Harvesting Materials and Systems (CEHMS).

PY - 2014/2/17

Y1 - 2014/2/17

N2 - We report an ultra-low start-up speed windmill that consists of a 72 mm diameter horizontal axis wind turbine rotor with 12 alternating polarity magnets around its periphery and a 60 mm × 20 mm × 0.7 mm piezoelectric bimorph element having a magnet at its tip. This wind turbine operates at very low Reynolds number of around 2×104, but still it has reasonably high power coefficient of about 11% at the optimal tip speed ratio of 0.7. It was found to produce peak electric power of 450 μW at the rated wind speed of 4.2 mph. An extremely low start-up wind speed of 2.4 mph was achieved by operating the bimorph in actuator mode.

AB - We report an ultra-low start-up speed windmill that consists of a 72 mm diameter horizontal axis wind turbine rotor with 12 alternating polarity magnets around its periphery and a 60 mm × 20 mm × 0.7 mm piezoelectric bimorph element having a magnet at its tip. This wind turbine operates at very low Reynolds number of around 2×104, but still it has reasonably high power coefficient of about 11% at the optimal tip speed ratio of 0.7. It was found to produce peak electric power of 450 μW at the rated wind speed of 4.2 mph. An extremely low start-up wind speed of 2.4 mph was achieved by operating the bimorph in actuator mode.

KW - low wind speed

KW - micro wind turbine

KW - Piezoelectricity

KW - renewable energy

KW - wind energy

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Ultra-low wind speed piezoelectric windmill

Abstract

Bibliographical note

Keywords

UN SDGs

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