AIR WELL
A curious bell-shaped well, used to collect condensation water in arid zones, to discover.
In 1931, Achille Knapen, a Belgian engineer, had the idea of inventing this curious well, a limestone bell tower 12 m in diameter and 12 m high. Beneath the bell tower, a kind of condenser with porous tubes conveys water into a cistern. Using the condensation principle, dew droplets form inside the well and are then transported to the cistern. A system so ingenious that it is now listed in the Inventaire Supplémentaire des Monuments Historiques and has been replicated in various hot and desert countries.
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