Efficiency of complex cycles of a gas turbine unit with varying degrees of heating in the first and second stages

The method of finding parameters of complex cycle gas turbine with intermediate heating is created, provided that effective efficiencies of simple and complex cycles are equal and the degree of gas heating at the first and second stages is different. It is shown, that under the conditions of equality effective efficiencies of simple and complex cycles and decrease of the degree of gas heating at the second stage compared with that at the first one, the work and effective efficiency maximum is achieved at of the degree of increase of pressure is optimal in terms of effective efficiency (economic) for the simple cycle, which may be the function of the degree of gas heating both at the first and the second stage. It is found that under the conditions of equality effective efficiencies of simple and complex cycles, decrease of the degree of gas heating at the second stage and economic of the degree of increase of pressure determined as the function this of degree of heating, provides a higher work maximum compared with that achieved under economic of the degree of increase of pressure determined as the function of the degree of gas heating at the first stage.