Performance analysis of gas turbine power plant; Effect of operating parameters

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Gargoum Loubna Ashour

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Journal Paper

Paper Information

Journal: ENERGY EQUIPMENT AND SYSTEMS Year:2024 | Volume:12 | Issue:2 Page(s): 171-183

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Information Journal Paper

Title

Performance analysis of gas turbine power plant; Effect of operating parameters

Author(s)

Gargoum Loubna Ashour | Issue Writer Certificate

Keywords

Simple Cycle Gas Turbine

compressor pressure ratio

Isentropic Efficiency

Exergy destruction

Abstract

This study aims to evaluate the performance of a simple cycle gas turbine power plant by analysing the effect of different operating parameters. These operating parameters include compressor pressure ratio and compressor & turbine isentropic efficiencies. The study quantitatively assesses the exergetic efficiency and the exergy destruction of each unit in the cycle, as well as the power used or produced by the cycle. Any change in these parameters can significantly impact the power plant's overall performance through a specific unit in the cycle. For instance, increasing the compressor pressure ratio can reduce the temperature difference across the combustor, lessening the exergy destruction and improving the cycle’s overall performance. However, any decline in the compressor or the turbine isentropic efficiency results in an increase in the exergy destruction of the affected unit and can result in a decrease in the overall cycle performance. This is due to either an increase in power required by the compressor or a decrease in power produced by the turbine. The analysis suggests that the turbine isentropic efficiency has a greater impact on the net power generated than the compressor isentropic efficiency. Additionally, the turbine inlet temperature is a dependent variable as operating at different compressor pressure ratios and compressor isentropic efficiencies lead to varying turbine inlet temperatures. Therefore, increasing the turbine inlet temperature does not always lead to improved performance.

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