Due to their numerous advantages, gas turbine (GT) power plants have become an important technology for power generation. A parametric analysis for the different configurations of the gas-turbine plant with effects of isentropic compressor and turbine efficiency are presented in this paper. The optimum configuration for gas-turbine was proposed to select optimum performance of a gas-turbine power plant with effects the isentropic compressor and turbine efficiency. The computational model was developed utilizing the MATLAB software.The simulated results show that the reheat gas-turbine configuration (HGT) has higher power output, while the regenerative gas-turbine configuration (RGT) has higher thermal efficiency with effects the isentropic compressor and turbine efficiency. The maximum thermal efficiency about 52.4 % and the maximum power output about 268MW obtained with the isentropic turbine efficiency. The obtained result reveals that the isentropic compressor and turbine efficiency are strongly influenced o the performance of gas-turbine.

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