FIELD: compression of gaseous media, air in particular, sucked from atmosphere at high degree of compression. SUBSTANCE: circulating loop of plant formed by compressor, connecting pipe line, settler and cooling liquid pipe line is used for circulating the cooling water free from oil and lubricants. Cooling water is delivered to cooler under action of pressure in settler. Circulating loop is provided with water preparation device which prevents formation of sediments of minerals. Water preparation device is made in form of polarizing unit for imparting electrical charge to foreign matter moved by cooling water; it may be provided with two permanent electrodes fed from external voltage supply source. Compression effected in compressor is close to isothermal compression. During compression, gas is cooled by mist of cooling water. Water is circulating in closed circulating loop and is subjected to repeated cycles of preparation. Water is delivered to compressor in such amount and such low temperature that temperature of gas at outlet is below or equal to it at inlet. Plant may be provided with screw compressor. Air saturated with water is fed as compressible gas. Larger part of air is injected into compression part of compressor through its housing. Compressor plant is provided with electrical control system. EFFECT: increased degree of compression at ecological safety. 17 cl, 4 dwg, 1 tbl
