When compressing air the compression heat that is, in common compressors, wasted in air coolers is produced. The heat makes 90% of electrical power and it can be used secondarily for other applications. Compression heat can be used for tempering adjacent rooms or heating water or other procedural liquids.
Summary of the benefits:
In this variant, existing air coolers and compressor ventilators are used. Ventilation piping is set at cooling expiration and using it, adjacent operations, workshops, storages, and production halls can be heated. Its advantages are quite easy installation and purchase price. Disadvantage is the fact that heat cannot be used continually all year long and the system cannot be combined with other heating systems into one unit.
The most effective method for utilization of residual heat is collecting thermal energy directly from the oil circuit of compressor and supplying such energy into water.
The principle lies in inclusion of a plate exchanger into the oil circuit of compressor, from which it collects and transforms thermal energy to secondary side, where it can be used for heating of water, heating system, heating of technological processes, etc. Oil circuit is further supplemented with thermostatic valve that keeps constant temperature in oil circuit so that the entire system and air coolers are not exerted due to tension caused by temperature fluctuation.
If thermal energy is not collected by recuperation exchanger, in other words – if there is no heat collection by final equipment (boiler, chemical pre-treatment in coating, in heating system, etc.), it is wasted through air cooler of the compressor. This regulation inside the compressor is fully autonomous.
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