estimation of actual performance of gas turbines of the compressor station in the southern iran operational region by using process data

the purpose of this study is modeling and simulation of twin-shaft gas turbine of the compressor station in the southern iran operational region and estimating their actual performance in the current situation in order to provide a maintenance plan for prioritizing the repair time for 4 rows of sgt-400 turbo compressor of gas compressor station. in this research, the information of twin-shaft gas turbine, sgt-400, (siemens company, germany) and measurable process data from the gas compressor station were collected. in this project, aspen hysys software was used for modeling and simulation of the gas compressor station process. in the simulation environment, the gas turbine was parted based on the constituent elements including 1) air compressor, 2) combustion chamber, 3) gas generator turbine 4) power turbine and each were modeled separately. the process gas compressor that its driving force is provided by the gas turbine also was modeled. by using collected process data of turbo compressors and process gas compressors from the compressor station, required output parameters such as power consumption or power production of each elements and their efficiency were obtained at operation conditions. according to modeling, the overall framework for prioritizing repair and maintenance time for gas turbines at this gas compressor station was provided on the basis of performance efficiency, which facilitates gas turbines repair process and reduces costs. in addition, the gas turbine process was simulated and effect of process parameters on the performance of gas turbine at operating conditions was investigated. the results showed noticeable effects of environmental conditions and temperature of inlet air to the combustion chamber on the gas turbine's performance efficiency.