COMBINED COOLING OF CENTRIFUGAL COMPRESSORS

Abstract

Actual problem is increases of efficiency of systems for cooling of centrifugal compressors with the purpose of increase in their productivity and decrease of specific power consumption during manufacture of compressed air. One from reserve for perfection of existing systems is use of the combined system of cooling in which except traditional remote intersection refrigerators is applied evaporating cooling of gas during it compressed due to liquid injected in the compressor before each section of compression and the organization of contact heat exchange between an injected liquid and hot gas directly after each section of compression. Results of experimental researches of the combined cooling of air compressors «K-500», «K-905» and «K-1500» are resulted. It is concluded that use of the combined cooling allows to increase the productivity of compressor on 12-15 % at simultaneous decrease of specific power consumption on 8-10 %. It is marked that at injection of liquid in a flowing part of compressors the stable operating conditions is observed, there is no erosion and active corrosion of elements which are taking place in contact to compressed gas. Recommendations on introduction of combined cooling are given, the most perspective circuit decisions are specified.