An impact-based broadband aeroelastic energy harvester for concurrent wind and base vibration energy harvesting

This paper proposes a novel broadband energy harvester to concurrently harvest energy from base vibrations and wind flows by utilizing a mechanical stopper. A problem for a conventional wind energy harvester is that it can only effectively harness energy from two types of excitations around its reso...

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Main Authors: Zhao, Liya, Yang, Yaowen
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2020
Subjects:
Online Access:https://hdl.handle.net/10356/140840
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1408402020-06-02T07:09:08Z An impact-based broadband aeroelastic energy harvester for concurrent wind and base vibration energy harvesting Zhao, Liya Yang, Yaowen School of Civil and Environmental Engineering Engineering::Civil engineering Broadband Concurrent Energy Harvesting Wind Energy This paper proposes a novel broadband energy harvester to concurrently harvest energy from base vibrations and wind flows by utilizing a mechanical stopper. A problem for a conventional wind energy harvester is that it can only effectively harness energy from two types of excitations around its resonance frequency. The proposed design consists of a D-shape-sectioned bluff body attached to a piezoelectric cantilever, and a mechanical stopper fixed at the bottom of the cantilever which introduces piecewise linearity through its impact with the bluff body. The quasi-periodic oscillations are converted to periodic vibration due to the introduction of the mechanical stopper, which forces the two excitation frequencies to lock into each other. Broadened bandwidth for effective concurrent energy harvesting is thus achieved, and at the same time, the beam deflection is slightly mitigated and fully utilized for power conversion. The experiment shows that with the stopper-bluff body distance of 19.5 mm, the output power from the proposed harvesting device increases steadily from 3.0 mW at 17.3 Hz to 3.8 mW at 19.1 Hz at a wind speed of 5.5 m/s and a base acceleration of 0.5 g. A guideline for the stopper configuration is also provided for performance enhancement of the broadband concurrent wind and vibration energy harvester. 2020-06-02T07:09:08Z 2020-06-02T07:09:08Z 2017 Journal Article Zhao, L., & Yang, Y. (2018). An impact-based broadband aeroelastic energy harvester for concurrent wind and base vibration energy harvesting. Applied Energy, 212, 233-243. doi:10.1016/j.apenergy.2017.12.042 0306-2619 https://hdl.handle.net/10356/140840 10.1016/j.apenergy.2017.12.042 2-s2.0-85037692784 212 233 243 en Applied Energy © 2017 Elsevier Ltd. All rights reserved.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Civil engineering
Broadband Concurrent Energy Harvesting
Wind Energy
spellingShingle Engineering::Civil engineering
Broadband Concurrent Energy Harvesting
Wind Energy
Zhao, Liya
Yang, Yaowen
An impact-based broadband aeroelastic energy harvester for concurrent wind and base vibration energy harvesting
description This paper proposes a novel broadband energy harvester to concurrently harvest energy from base vibrations and wind flows by utilizing a mechanical stopper. A problem for a conventional wind energy harvester is that it can only effectively harness energy from two types of excitations around its resonance frequency. The proposed design consists of a D-shape-sectioned bluff body attached to a piezoelectric cantilever, and a mechanical stopper fixed at the bottom of the cantilever which introduces piecewise linearity through its impact with the bluff body. The quasi-periodic oscillations are converted to periodic vibration due to the introduction of the mechanical stopper, which forces the two excitation frequencies to lock into each other. Broadened bandwidth for effective concurrent energy harvesting is thus achieved, and at the same time, the beam deflection is slightly mitigated and fully utilized for power conversion. The experiment shows that with the stopper-bluff body distance of 19.5 mm, the output power from the proposed harvesting device increases steadily from 3.0 mW at 17.3 Hz to 3.8 mW at 19.1 Hz at a wind speed of 5.5 m/s and a base acceleration of 0.5 g. A guideline for the stopper configuration is also provided for performance enhancement of the broadband concurrent wind and vibration energy harvester.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Zhao, Liya
Yang, Yaowen
format Article
author Zhao, Liya
Yang, Yaowen
author_sort Zhao, Liya
title An impact-based broadband aeroelastic energy harvester for concurrent wind and base vibration energy harvesting
title_short An impact-based broadband aeroelastic energy harvester for concurrent wind and base vibration energy harvesting
title_full An impact-based broadband aeroelastic energy harvester for concurrent wind and base vibration energy harvesting
title_fullStr An impact-based broadband aeroelastic energy harvester for concurrent wind and base vibration energy harvesting
title_full_unstemmed An impact-based broadband aeroelastic energy harvester for concurrent wind and base vibration energy harvesting
title_sort impact-based broadband aeroelastic energy harvester for concurrent wind and base vibration energy harvesting
publishDate 2020
url https://hdl.handle.net/10356/140840
_version_ 1681058703280701440