New approach for enhancing the performance of gas turbine cycle: A comparative study

Abstract

In order to achieve higher performance of combined cycle power plant and reducing greenhouse gas emission, recently different technical approaches have been used based on the choice of higher efficiency of pure mechanical components nonetheless these solution remain very expensive. Though, including original combinations of two or more systems are not well treated previously. In this paper a comparative study has been performed for three combined gas turbine cycle configurations S3, S4 and S5 including innovative combinations for both simple gas turbine cycle S1 and regenerative gas turbine cycle S2. The evaluations of these proposed configurations are executed according to the thermodynamics conventional energy and exergy analysis. The effects of the new configurations on the performance and the exergy destruction of the combined cycle plant are investigated. The results indicate that the third configuration S5 is the most beneficial for the industrialists. The analysis method is used to recognize and identify the most substantial system configuration with less exergy destruction. Models that were used in the present study give a novel alternative approach to increases not only the thermal efficiency and net output of power plant by using the same amount of fuel rate but also to reduce exergy losses.