Title: Performance assessment of supercritical power plant based oil fuel under sliding-pressure operation

Authors: Karim Abd El-Hakam A. Mohamed; Ali A.M. Hassan; Hussein M. Maghrabie

Addresses: Department of Mechanical Power Engineering and Energy, Faculty of Engineering, Minia University, Minia, 61111, Egypt ' Department of Mechanical Power Engineering and Energy, Faculty of Engineering, Minia University, Minia, 61111, Egypt ' Department of Mechanical Engineering, Faculty of Engineering, South Valley University, Qena, 83521, Egypt

Abstract: Energetic and exergetic analyses of a 626 MWe supercritical power plant-based mazout oil-fired are carried out to assess the system's performance. The energy losses and exergy destruction are evaluated for each system component using real actual data. The results show that the boiler is the primary source of irreversibility with 88.62% of the total exergy destruction. The intermediate pressure turbine maintains an exergy efficiency of 97% at 100%-load. Moreover, the maximum thermal efficiency is achieved at 100%-full load by 44.85% whereas, the maximum overall exergy efficiency of 40% is acquired at the maximum continuous rate condition of 105%-load.

Keywords: energy and exergy analyses; supercritical steam power plant; sliding-pressure operation; mazout fuel.

DOI: 10.1504/IJEX.2023.129807

International Journal of Exergy, 2023 Vol.40 No.3, pp.303 - 316

Received: 24 Apr 2022
Received in revised form: 11 Dec 2022
Accepted: 11 Dec 2022
Published online: 30 Mar 2023 *

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