Abstract
The evaporative gas turbine cycle is a new high-efficiency power cycle that has reached the pilot plant testing stage. The latest configuration proposed for this cycle is known as part flow evaporative gas turbine cycle (PEvGT) in which humidification is combined with steam injection. Having advantages of both steam injected and humid air cycles, it is regarded as a very desirable plant for future. A mathematical model of the PEvGT cycle was presented in the previous work (Yari and Sarabchi, 2004), in order to do the analysis of the cycles. In this work the exergy equations have been added to the mathematical model. The aim of this work is to investigate the performance of the PEvGT cycles: PEvGT and PEvGT-IC (Intercooled PEvGT cycle), based on the exergy analysis. The results are presented and the influence of the several parameters is discussed: pressure ratio, part-flow humidification rate and the cycle configuration. Also the optimum cycle configuration has been selected from the exergetic point of view.
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