Tiny generator turns waste walnut shells and water droplets into clean electricity

Researchers at the University of Waterloo have developed a small generator that converts agricultural waste, specifically walnut shells, into clean electricity using water droplets. This device, known as a water-induced electric generator (WEG), taps into hydrovoltaic energy harvesting by utilizing the electrical imbalance created when water evaporates from a walnut shell. While currently able to power small electronics like calculators, the technology holds promise for applications in remote or off-grid locations. The team is exploring additional practical uses, including wearable designs that harvest energy from sweat or raindrops.