Exergy analysis provides useful means to evaluate and identify the sources of thermodynamic inefficiencies within each system component. This paper tries to analyze the combustion in a simple gas turbine system by comparing the effect of variation of species concentrations in the combustion process. Both complete and equilibrium combustion models as well as gas equilibrium software are used to perform the exergetic evaluation of the simple gas turbine system with a rated output of 50 MW. The complete combustion model involved O2, N2, CO2 and H2O while the equilibrium combustion model involved N2, O2, CO2, H2 O, CO, H2, H, O, OH and NO as the species of combustion products. The results show that the thermo-mechanical exergy rate is higher in the equilibrium combustion model than that of the complete combustion model and this increase is caused by the addition of species in the combustion product. Exergetic evaluation gave the values of 49.993 MW and 56.467 MW for the thermo-mechanical exergy rate for the complete and equilibrium combustion models respectively.
|Journal||European Journal of Scientific Research|
|Publication status||Published - 2017|