# Experimental Study on an Inclined Cylindrical Piezoelectric Energy Harvester

## TL;DR

This paper introduces a new adjustable piezoelectric energy harvester that improves performance in low-wind-speed environments.

## Contribution

The novel design features an inclined cylindrical bluff body with adjustable parameters to enhance energy harvesting performance.

## Key findings

- The optimized configuration achieves a wider operational frequency band and higher energy conversion efficiency.
- A second voltage peak reaches up to 122.4% of the first peak's maximum voltage.
- The device maintains performance over a wind speed range of 2.3 m/s to 5.7 m/s.

## Abstract

Energy harvesting plays a pivotal role in enabling sustainable power supply for the Internet of Things and distributed sensor networks, particularly for low-power devices. Piezoelectric energy harvesters based on vortex-induced vibrations offer a promising solution for low-wind-speed applications, yet their performance is constrained by limited bandwidth and sensitivity to wind speed variations. This study addresses these limitations by proposing a novel multi-parameter adjustable piezoelectric energy harvester featuring an inclined cylindrical bluff body. By systematically tuning the inclination angle and installation position, the device achieves substantial performance improvements. Experimental results indicate that the optimized configuration yields a wider operational frequency band and enhanced energy conversion efficiency. Through the experimental results, we discovered the existence of the double-peak phenomenon and the plateau phenomenon. The voltage value of the second peak can reach up to 122.4% of the maximum voltage of the first peak. The duration of the maximum plateau phase can maintain between the wind speed of 2.3 m/s and 5.7 m/s.