Thermodynamic and thermoeconomic comparison of combined cycle cogeneration systems

Date

2006-01-01

Author

Colpan, Can O.
Yesin, Tulay

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In this paper, several configurations of combined cycle cogeneration systems are investigated by energy, exergy and thermoeconomic analyses. In each of these configurations, varying steam demand is considered rather than fixed steam demand. Among the different approaches for thermoeconomic analysis in the literature, the specific exergy costing method is applied. Since the systems have more than one product (process steam and electrical power), systems are divided into several sub-systems and cost balances are applied together with the auxiliary equations. Hence, the cost rate of each product is calculated. Comparison of the configurations, in terms of performance assessment parameters and costs per unit of exergy, are also given in this study. In conclusion, it is found that combined cycle cogeneration systems with extraction-condensing steam turbines are thermodynamically and thermoeconomically more advantageous when compared to those with back-pressure steam turbines.

Subject Keywords

Cogeneration, Combined cycle, Energy, Exergy, Speco, Thermodynamic analysis, Thermoeconomic analysis

URI

https://hdl.handle.net/11511/65323

Journal

INTERNATIONAL JOURNAL OF EXERGY

DOI

https://doi.org/10.1504/ijex.2006.009797

Collections

Department of Mechanical Engineering, Article

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Citation Formats

C. O. Colpan and T. Yesin, “Thermodynamic and thermoeconomic comparison of combined cycle cogeneration systems,” INTERNATIONAL JOURNAL OF EXERGY, pp. 272–290, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65323.