Omid Moradtalab - Electrical Engineering Department, Islamic Azad University of Borujerd Branch
Rasoul Moradtalab - Oil & Gas Department of MECO, Mapna Group
Ali Fereidooni - Members of Young Researchers Club

The aim of this research was studies how to improve the capacity of the combined cycle (CC) power plant which has been operated for several years. The most popular way is to lower intake air temperature to around 150C (ISO) and 100% RH before entering the air compressor of a gas turbine (GT). We do this research in three seasons: winter, summer and rainy season. According to 2003 Tehran monthly weather data, all year ambient temperature is higher than 150C. This research proposes a steam absorption chiller (AC) to cool intake air to the desired temperature level. It could increase the power output of a GT by about 10.8% and the CC power plant by around 6.24% annually. In economic analysis, the payback period will be about 3.71 years, internal rate of return 41%, and net present value 19.64 MUS$.

combine Cycle power plant, Economics, Monthly analysis, Uncertainty, Gas turbine