Effect of Operating Variables on Exergetic Efficiency of an Active Gas Turbine Power Plant

Abam, F. I.; Ugot, I. U.; Igbong, D. I.
February 2012
Journal of Emerging Trends in Engineering & Applied Sciences;Feb2012, Vol. 3 Issue 1, p131
Academic Journal
The effect of operating thermodynamic variables on the exergetic efficiency of an active gas turbine power plant was investigated. The study is primarily aimed at analysing the performance of the turbine plant and examine how the changes in the operating thermodynamic variables affect the performance of the gas turbine components and the entire turbine plant. The operating variables considered are: ambient temperature (AT), turbine isentropic efficiency (TIE), compressor isentropic efficiency (CIE), compressor pressure ratio (CPR) and turbine inlet temperature (TIT). The results obtained show that a degree increase in AT, lead to 0.45% decrease in the overall exergetic efficiency of the plant, 0.27MW increase in total exergy destruction rate and 0.1%, 0.32% and 0.23% increase in exergy destruction rate of the compressor, combustion chamber and turbine respectively. Similarly, the overall exergetic efficiency of the turbine increased by 0.06% for 5% increase in CPR and decreased by 0.04% for 7% increase in CPR. TIT, TIE and CIE have profound effect on the exergetic efficiency of the plant. However, for moderate changes in CPR, CIT and TIE no severe changes were noticed in the gas turbine performance


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