A promising direction in the development of the power engineering is the use of energy-saving technologies based on gas turbine units, which can significantly increase the efficiency of using fossil fuel. In a number of cases, the operation of a gas turbine unit is carried out at modes below the optimum in terms of efficiency. Therefore, the economic efficiency of the unit is of great interest. During the last years, gas turbine efficiencies were successfully improved by raising the compressor pressure ratio and the turbine inlet temperature. The challenge of constantly improving the gas turbine efficiency by these methods has reached a critical moment, raising of the compressor pressure ratio and the turbine inlet temperature ran up to the limit. A high level of these parameters require the using of new expensive durable heat-resistant materials.
