Energy-harvesting surfaces are smart infrastructure elements, such as pavements and walls, designed to generate electricity from environmental vibrations and temperature differences.
They address the challenge of powering smart city infrastructure and Internet-of-Things (IoT) devices without relying on traditional grid electricity or batteries.
These surfaces incorporate piezoelectric crystals and thermoelectric generators (TEGs). Piezoelectric materials convert mechanical stress into electrical energy when compressed or vibrated. TEGs transform heat gradients directly into electrical power without the need for moving parts, making them highly efficient in harvesting thermal energy.
Manufacturing involves integrating piezoelectric crystals and TEGs into concrete, asphalt, or other building materials. This requires precise engineering to ensure durability and performance under various environmental conditions.
The build process includes mixing the energy-harvesting components with conventional construction materials during the manufacturing stage. Once installed, these surfaces can begin generating power immediately upon use.
Field units draw low hundreds of watts; fabrication is energy-intensive due to vacuum baking.
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