Toward Small-Scale Wind Energy Harvesting: Design, Enhancement, Performance Comparison, and Applicability

Table 8

Summary of other types of energy harvester devices.

Author	Transduction	Cut-in wind speed (m/s)	Cut-out wind speed (m/s)	Maximum power (mW)	Wind speed at max power (m/s)	Dimensions	Power density per volume (mW/cm^3)	Advantages/disadvantages and other information
Bibo et al. [75]	Piezoelectric	≈5.5	—	0.05	7.5	Cantilever: 5.8 × 1.626 × 0.038 cm^3.; Chamber volume: 2300 cm^3	2.17 × 10^−5	(i) Mimicking the basic physics of music-playing harmonicas.; (ii) Using optimal chamber volume and decreasing aperture’s width reduce the cut-in wind speed.
Ovejas and Cuadras [76]	Piezoelectric	—	—	0.0002	12.3	Two identical bluff bodies: 0.5 cm in dia.; Piezoelectric film: 15.6 cm × 1.9 cm × 40 μm	1.25 × 10^−5	(i) Bluff body configuration outperformed the one fixed side and two fixed side configurations.; (ii) Rotational turbulent flow from a dryer added to vortex shedding effects, giving higher electrical output than the laminar flow did.

Obtained from the information of Figure (b) of the reference.