Techno-Economic Assessment of Different Inlet Air Cooling Systems in Warm Dry & Wet Climate Stations

Performance of a gas turbine mainly depends on the inlet air temperature. The power output of a gas turbine depends on the flow of mass through it. This is precisely the reason why on hot days, when air is less dense, power output falls. The objective here is to assess the advanced systems applied in reducing the gas turbine intake air temperature and examine the merits from integration of the different air-cooling methods in two 25 MW gas-turbine-based gas pipeline stations. Four different intake air-cooling systems are applied in two pipeline gas stations. The calculations made on annual basis of operation. The techno-economic and exergoeconomic analysis of heat recovery of gas exhaust is assessed for Turbo-compressor Station through this proposed inlet air cooling system. Modifications are applied on a MAPNA 25 MW gas turbine in compressor station. The configuration of gas turbines in compressor station is based on (3+1) arrangement. In this context, a heat recovery steam generator and a steam turbine are added for three gas turbines as a proposed combined cycle. The case study is run on Assaloyeh and Qom pipeline gas stations in Iran Gas Trunk line 8. Thermodynamic simulation, mechanical design and economic analysis are run in Thermoflow (GT PRO module) software. The thermodynamic, economics and exergoeconomic parameters from integration of different cooling systems in this proposed combined cycle are calculated and compared.