Conversia caldurii in electricitate.
A Sound Way to Turn Heat into Electricity
University of Utah physicists have developed small devices that turn heat into sound and then into electricity. The technology holds promise for changing waste heat into electricity, harnessing solar energy and cooling computers and radars.
“We are converting waste heat to electricity in an efficient, simple way by using sound,” says Orest Symko, a University of Utah physics professor who leads the effort. “It is a new source of renewable energy from waste heat.”
In the above photo, Symko demonstrates how heat can be converted into sound by using a blowtorch to heat a metallic screen inside a plastic tube, which then produces a loud tone, similar to when air is blown into a flute. Symko and his students are developing much smaller devices that not only convert heat to sound, but then use the sound to generate electricity.
Symko plans to test the devices within a year to produce electricity from waste heat at a military radar facility and at the university’s hot-water-generating plant.
Super tare ideea, dar sunt curios daca intradevar randamentul unui asemenea convertor caldura-electricitate este mai mare decat al unei foto celule
Conversia este pizoelectrica, adica trasforma o miscare mecanica in energie elctrica. Miscarea mecanica este data de undele sonore produse intr’un tub de rezonanta, datorita caldurii. Mai multe detalii in articolul complet de mai sus.
