Efficiency Analysis of the Third Unit in Al-Khoums Steam Power Plant, Libya

Musa M. Allafi; Mohamed A. Ehdidan; Ahmed A. Lashlem

doi:10.59743/jmset.v9i2.157

Authors

Musa M. Allafi المعهد العالي لتقنيات علوم البحار، الخمس، ليبيا.
Mohamed A. Ehdidan Higher Institute of Science and Technology, Al-Khoums, Libya.
Ahmed A. Lashlem Faculty of Natural Resources, Al-Jufra University, Libya.

DOI:

https://doi.org/10.59743/jmset.v9i2.157

Keywords:

Steam turbine, Steam power plant, Overall efficiency, Al-Khoms steam power plant, Thermal efficiency

Abstract

The thermal and overall efficiency of the third unit in the Al-Khoums steam power plant were investigated in this paper. Two samples of data have been used: the first was collected from the start-up data sheet of the power plant with a load of 120 MWH, and the second was collected in June 2023 with a load of 96 MWH. This study reveals that the thermal efficiency of the unit decreased by 9.4% (from 40.4% to 36.6%) due to the life of the plant and the stoppage of extraction lines, and the overall efficiency decreased by 8.7% (from 36.7% to 33.5%). Moreover, heat rejected by the condenser increased in the second sample by 44 kJ/kg. Steam cycles for both study samples were presented by T-S diagrams using Engineering Equation Solver software (EES), and it was clear from those diagrams that the efficiency of the high-pressure turbine in the first sample is higher than the second one.

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