Abstract
Abstract An interesting configuration of the gas turbine engine is the over-expansion cycle, where an inverted gas turbine is added to the gas turbine engine in addition to the waste heat recovery comprising water and liquid hydrogen heaters. The analysis of this cycle involved compressor pressure ratio and turbine inlet temperature as the main variables. Pressure losses in the heat exchangers and variation of polytropic efficiencies of turbomachines with different loads were considered. The results of this study show that the over-expansion cycle gives about 17% less specific work and 20% higher efficiency than the conventional cycle. Thus, it could be used conveniently in industrial stationary applications.
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