EXERGY ANALYSIS OF A CO-GENERATION PLANT

Abstract

Limitations of traditional first-law analysis, based upon thermodynamic performance of process unit coupled with mass and energy balances, are not a serious limitation when dealing with familiar systems. However, when dealing with more uncongenial, complex ones, it provides incomplete insight for such evaluation. These limitations came from the fact that first-law analysis does not indicate the sources or magnitudes of entropy production, which is, by the second law, essential criterion for scaling losses. An evaluation of plant performance will usually require a comparison of the thermodynamic performance of process units with available data from existing plants. Therefore, exergy analysis is more than useful, providing information about magnitudes of losses and their distribution throughout the system as well. Such analysis is very thankful at the level of process units but applied on higher system levels e.g. the comparison of overall plant performance (total system) or the performance of subsystems, represents the valuable method for indicating where research resources can be directed to best advantage.

Keywords

Dates

  • Submission Date2008-02-27
  • Revision Date2008-07-11
  • Acceptance Date2008-07-15

DOI Reference

10.2298/TSCI0804075F

References

  1. Bošnjaković, F., Figt against Irreversibilities (in German), Archiv für Wärmewirtschaft, Zeitschrift für Energie-Wirtschaft., 19 (1938), 1, pp. 1-2
  2. Bejan, A., Entropy Generation Minimization, CRC Press, Boca Raton, Fla., USA, 1996
  3. Galović, A, Termodinamika I, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 1998
  4. Bošnjaković, F., Knoche, K. F., Technical Thermodynamics - Part 1 (in German), Steinkopf Verlag Darmstadt, Leipzig 1988
  5. Hussain, M. M., Dincer, I., Li, X., Energy and Exergy Analysis of an Integrated SOFC Power System, http://watcar.uwaterloo.ca/pdf/SOFC_system_analysis.pdf
  6. Austrem, I., The Exergy Efficiency of Hydrogen-Fired Gas Power Plants, http://www.indecol.ntnu.no/indecolwebnew/publicaions/mastertheses/Inger%20Austrem%20var03/altie-tt.pdf
  7. Woudstra, N., Value Diagrams and Exergy Efficiencies, http://www.3me.tudelft.nl/live/pagina.jsp?id=c1ada5ad-9a91-4b12-be73-c1c92a2a1453&lang=en&binary=/doc/Value%20diagrams%20and%20exergy%20efficiencies.pdf
  8. Moran, M., Tsatsaronis, G., Engineering Thermodynamics, Chapter 1 in CRC Handbook of Thermal Engineering (Editor-in-Chief, F. Kreith), CRC Press, Boca Raton, Fla., USA, 2000, pp. I-1 through I-108
  9. Rašković, P., Kuštrimović, D., Second Law of Thermodynamic - Theoretical Background, Approaches and Implications in Practical Engineering, Faculty of Mechanical Engineering, University of Niš, Niš, Serbia
  10. Baehr, H. D, Thermodynamics, Springer-Verlag, Berlin-Heidelberg-New York, Tokyo, 1984
  11. Tsatsaronis, G., Definitions and Nomenclature in Exergy Analysis and Exergoeconomics, Technische Universität Berlin, Institute for Energy Engineering, Berlin, Germany
  12. Rašković, P., Ilić, G., Stoiljković, S., Exergetic Evaluation of CHP Plant by the Use of Spread Sheet Software Tool, Faculty of Mechanical Engineering, University of Niš, Niš, Serbia
  13. Kraut, B., Mechanical Engineering Handbook (in Croatian), 10th ed., Kratis, Zagreb, 1997
  14. Bošnjaković, F., Thermodynamics - Part 1 (in Croatian), Tehnicka knjiga, Zagreb, 1970
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