Performance Evaluation of the Afam VI Combined Cycle Power Plant System using Energy and Exergy Analysis Approach

Performance evaluation of the 685 MW Afam VI combined cycle power plant (CCPP) in Nigeria was carried out using energy and exergy analyses approach. The data used were the plant’s design data and operating data for 2013-2015. The plant is made up of three gas turbine generation sets of 165 MW each and a condensate-type steam turbine of 190 MW. Each sub-component of the plant was analyzed separately with a view of pinpointing the component with highest source of exergy destruction. The results showed that the combustion chamber (CC) had mean exergy efficiency of 14.02% and highest mean exergy destruction value of 11363986 kW. The least mean exergy destruction of 56.378 kW was found in the pump.