FIELD: development of power plants. SUBSTANCE: air duct in the form of framework is covered with flexible casing. Toroidal balloon secured duct communicates through inner surface restricting toroid bore, with external surface of air duct. Toroidal surface external in respect to bore is connected to cables placed at certain angle to vertical and fixed in ground. Several toroidal balloons are mounted through height of air duct. Balloons mounted closer to ground have smaller diameter and volume than those mounted between layers. EFFECT: development of new environment-oriented power supplies. 4 cl, 3 dwg
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