Thermodynamic modeling and second law based performance analysis of a gas turbine power plant (exergy and exergoeconomic analysis)
Abstract
It this research paper, a complete thermodynamic modeling of one of the gas turbine power plants in Iran is performed based on thermodynamic relations. Moreover, a complete computer code is developed for the simulation purposes using the Matlab software. To assess the system performance, exergy and exergo-economic analysis are conducted to determine the exergy destruction of each component and cost of each flow line of the system. A complete parametric study is also carried out to study the effect of some design parameters such as exergy efficiency and total cost of exergy destruction on the system performance variation. The exergy analysis results have revealed that combustion chamber (CC) is the most exergy destructor component compared to other cycle components. Also, its exergy efficiency is less than other components which is due to the high temperature difference between working fluid and burner temperature. In addition, it was found that by an increase in the TIT (gas turbine inlet temperature), the exergy destruction of this component can be reduced. On the other hand, the cost of exergy destruction, which is a direct function of exergy destruction, is high for combustion chamber. The effects of design parameters on exergy efficiency have shown that an increase in the air compressor pressure ratio and TIT increases the total exergy efficiency of the cycle. Furthermore, the results have revealed that by an increase in the TIT for about 350 K the cost of exergy destruction can be decreased for about 22%. Therefore, TIT is the best option to improve the cycle losses.References
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[2] Ameri M., Ahmadi P., Hamidi A., 2009: Energy, exergy and exergoeconomic analysis of a steam power plant (A Case Study). International Journal of Energy Research 33:499–512.
[3] Ameri M., Ahmadi P., Khanmohamadi S., 2007: Exergy analysis of Supplementary Firing Effects on the Heat Recovery Steam Generator. Proceedings of the 15th international conference on Mechanical Eng, Paper No. 2053, Tehran Iran.
[4] Ameri M., Ahmadi P., 2007: The Study of Ambient Temperature Effects on Exergy Losses of a Heat Recovery Steam Generator. Proceedings of the International Conference on Power Eng., Hang Zhou, China,55-61.
[5] Balli O., Aras H.,: Energetic and exergetic performance evaluation of a combined heat and power system with the micro gas turbine (MGTCHP). International Journal of Energy Research 2007; 31(14):1425–1440.
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[8] Cihan, A., Hacıhafızoglu, O., Kahveci, K., 2006: Energy-exergy analysis and modernization suggestions for a combined-cycle power plant, Int. J. Energy Research 30:115–126.
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[10] Moran M., 1989: Availability Analysis Guide, to Efficient Energy Use Englewood Cliffs, Prentice-Hall, N.J.
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[12] Rosen M.A., Dincer I., 2003: Thermoeconomic analysis of power plants: an application to a coal fired electrical generating station, Energy Conversion and Management 44 , 2743–2761.
[13] Bejan, A., Tsatsaronis, G., Moran M., 1996: Thermal Design and Optimization. Wiley: New York.
[2] Ameri M., Ahmadi P., Hamidi A., 2009: Energy, exergy and exergoeconomic analysis of a steam power plant (A Case Study). International Journal of Energy Research 33:499–512.
[3] Ameri M., Ahmadi P., Khanmohamadi S., 2007: Exergy analysis of Supplementary Firing Effects on the Heat Recovery Steam Generator. Proceedings of the 15th international conference on Mechanical Eng, Paper No. 2053, Tehran Iran.
[4] Ameri M., Ahmadi P., 2007: The Study of Ambient Temperature Effects on Exergy Losses of a Heat Recovery Steam Generator. Proceedings of the International Conference on Power Eng., Hang Zhou, China,55-61.
[5] Balli O., Aras H.,: Energetic and exergetic performance evaluation of a combined heat and power system with the micro gas turbine (MGTCHP). International Journal of Energy Research 2007; 31(14):1425–1440.
[6] Sahin B., Ali K.,: Thermo-dynamic analysis of a combined Carnot cycle with internal irreversibility. 1995, Energy 20(12):1285–1289.
[7] Kotas Tj., 1985: The Exergy Method of Thermal Plant Analysis. Butterworths: London.
[8] Cihan, A., Hacıhafızoglu, O., Kahveci, K., 2006: Energy-exergy analysis and modernization suggestions for a combined-cycle power plant, Int. J. Energy Research 30:115–126.
[9] Ahmadi P., 2006: Exergy concepts and exergy analysis of combined cycle power plants (a case study in Iran), B.Sc. Thesis, Energy Engineering Department, Power & Water University of Technology (PWUT), Tehran, Iran.
[10] Moran M., 1989: Availability Analysis Guide, to Efficient Energy Use Englewood Cliffs, Prentice-Hall, N.J.
[11] Tsatsaronis G., 2007: Definitions and nomenclature in exergy analysis and exergoeconomics, Energy 32, 249–253.
[12] Rosen M.A., Dincer I., 2003: Thermoeconomic analysis of power plants: an application to a coal fired electrical generating station, Energy Conversion and Management 44 , 2743–2761.
[13] Bejan, A., Tsatsaronis, G., Moran M., 1996: Thermal Design and Optimization. Wiley: New York.
Published
2012-10-01
How to Cite
AMERI, Mohammad; ENADI, Nooshin.
Thermodynamic modeling and second law based performance analysis of a gas turbine power plant (exergy and exergoeconomic analysis).
Journal of Power Technologies, [S.l.], v. 92, n. 3, p. 183--191, oct. 2012.
ISSN 2083-4195.
Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/331>. Date accessed: 18 apr. 2024.
Issue
Section
Power Plant
Keywords
Gas turbine power plant, Exergy analysis, Efficiency, Exergy destruction, Economic analysis
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