Energy–exergy analysis and modernization suggestions

Energy–exergy analysis and modernization suggestionsfor a combined-cycle power plantEnergy and exergy analysis were carried out for a combined-cycle power plant by using the data taken fromits units in operation to analyse a complex energy system more thoroughly and to identify the potential forimproving efficiency of the system. In this context, energy and exergy fluxes at the inlet and the exit of thedevices in one of the power plant main units as well as the energy and exergy losses were determined. Theresults show that combustion chambers, gas turbines and heat recovery steam generators (HRSG) are themain sources of irreversibilities representing more than 85% of the overall exergy losses.