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The analysis of the existing gas turbine plants (GTP) by using air intercooling from various manufacturers has been carried out, the main technical characteristics and basic parameters of operation of these GTP have been determined. Among the considered technologies for intercooling of cyclic air in gas turbine plants there are data from such wellknown manufacturers as Rolls-Royce, General Electric and Nevsky Plant. The main ways of implementing intercooling of cyclic air GTP have been considered, namely, cooling in the surface heat exchanger and contact cooling with injected water. An aerothermopressor apparatus used can be a promising way of moistening the working environment of a gas turbine. The aerothermopressor work is based on the process of thermogasdynamic compression (thermopression). A feature of this process is an increase in pressure, as a result of the instantaneous evaporation of the liquid injected into the air flow, which is accelerated to speed near the sound. In this case, heat is removed from the air flow to evaporate water, as a result of which air temperature is decreased. A comparative analysis of the existing and aerothermopressor technologies for air intercooling of GTP has been carried out. The aerothermopressor provides more effective liquid spraying and, hence, more effective isothermal compression process in the high pressure compressor is done. The proposed cooling technology makes it possible using low-potential heat of secondary energy resources of gas turbine plants (heat of cyclic air). It has been revealed that the aerothermopressor allows to increase the pressure of the cyclic air between the compressors by 2-9%, which leads decreasing compression work in compressor steps, and water injection leads increasing the number of working fluid in the cycle by 2-5%, and, as a result, the power is increased by 3-10% and the GTP efficiency is increased by 2-4%. The additional amount of injected water can be up to 10-15% relative to the cyclic air consumption. [ABSTRACT FROM AUTHOR]