Advanced exergy analysis of a Cycle for generating power from Sabalan geothermal resources

Sabalan geothermal wells are the only wells dug-out in Iran. In this paper a combined flash-binary cycle for power production from this wells is analyzed from the viewpoint of advanced exergy with EES software using thermodynamic cycles method. The results of exergy analysis show that the condenser of binary cycle has the highest value of exergy destruction, then the condenser of flash cycle, the turbine of binary cycle and the second separator have the highest value of exergy destruction. The results of advanced exergy show that the endogenous part of the exergy destruction for all components of the cycle are higher than the exogenous part except to preheater and the endogenous part of the exergy destruction for whole cycle is much higher than the exogenous part, which shows that the irreversibility effect of the components is greater than the ineffectiveness of the cycle structure. Also the total avoidable exergy destruction of the cycle is equal to 4491/8 kw and the total avoidable exergy destruction of the cycle is equal to 5964/04 kw.