Its modest power levels mean that it can only charge tools that don’t require lots of electricity, like remote sensors. However exciting, the system still has significant limitations. However they think that the device could also harvest electricity from other temperature variations, such as those produced by on-off cycling of everything from a domestic refrigerator to industrial machinery. The researchers ran initial tests using the 24-hour cycle of ambient air temperature. The material is very good at holding on to the heat, but can also move it around effectively, facilitating the differential required to generate electricity.
One side of the device captures heat, which is then slowly transported to the other side.
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