Recent Advances in Energy Harvesting Technologies for Structural Health Monitoring Applications

Table 1

Comparison of energy harvesting methods [15].

	Power density (µW/cm^3); 1-year lifetime	Power density (µW/cm^3); 10-year lifetime
Solar (outdoors)	15,000—direct sun; 150—cloudy day	15,000—direct sun; 150—cloudy day
Solar (indoors)	6—office desk	6—office desk
Vibrations	200	200
Temperature gradient	15 @ 10°C gradient	15 @ 10°C gradient
Batteries (nonrecharg. lithium)	45	3.5