International Research Journal of Innovations in Engineering and Technology - IRJIET International Open Access, Monthly, Peer Reviewed, Reputed Journal ISSN (online): 2581-3048

Impact Factor (2025): 6.9

DOI Prefix: 10.47001/IRJIET

Exergy Analysis of Combined Gas Turbine Unit

Abstract

The present study focused on evaluating the performance of the combined generating unit using the second law of thermodynamics and under different operating conditions, including the external ambient temperature and the compression ratio. The results showed that when the compression ratio changed from 8 to 16, the generated power and thermal efficiency in the Combined unit and the efficiency of the second law of the Combined unit would increase by (4.2%), (9.815%) (8.64%), respectively with the increase in the compression ratio from 8 to 16. In order to find out the amount of exergy destruction, the second law of thermodynamics was used to determine the greatest amount of available destructive energy in all components of the Combined generating unit, starting from the simple gas unit and ending with the Combined generating unit, as the results showed that the exergy destruction relative to the simple gas unit decreases with high the external ambient temperature is from 100C to 500C and the highest value of the exergy destruction is in the combustion chamber and is estimated at (228.9MW).  While the highest value of the exergy destruction was obtained in the steam generation system is (138.9MW) at the external ambient temperature of 100C, the steam unit was also affected by the increase in the external ambient temperature and the highest value of the exergy destruction is (5.654MW) at the temperature of the external environment The ambient is 500C and the maximum amount of energy available destroyed in a combined generating unit is MW (496,356) at an ambient temperature of 100C.

Country : Iraq

1 Rafal Khalid Jasim Alswediani2 Abdul Rahman.H.AL-Hobo

  1. Northern Technical University, Mosul, Iraq
  2. Assistant Professor, Mechanical Engineering Department, Mosul University, Mosul, Iraq

IRJIET, Volume 6, Issue 3, March 2022 pp. 1-6

doi.org/10.47001/IRJIET/2022.603001

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