New ways for increasing efficiency of the small-capacity air-derivative gas-turbine units operating by gas-steam cycle

The scheme of a gas-turbine unit (GTU) operating according to the gas-steam cycle with wet compression of the working medium, water injection downstream of the compressor, and regenerative heating of the air-water mixture obtained is developed and analyzed. Comparative calculations of the efficiency and specific power are conducted for power installations operating according to such a cycle, which can be created on the basis of type GTE-1.25 and some other domestic gas turbines. The data obtained show high performance indexes of such installations.