Efficiencies of Power Plants

  • Mehmet Kanoğlu
  • Yunus A. Çengel
  • İbrahim Dinçer
Part of the SpringerBriefs in Energy book series (BRIEFSENERGY)


In order to improve the efficiencies of power plants, there is a strong need to investigate their thermodynamic characteristics and performance. Power plants are normally examined using energy analysis, but a better understanding is attained when a more complete thermodynamic view is taken, which uses the second law of thermodynamics in conjunction with energy analysis via exergy methods. Although exergy analysis can be generally applied to energy and other systems, it appears to be a more powerful tool than energy analysis for power cycles because it helps determine the true magnitudes of losses and their causes and locations, and improve the overall system and its components. In this chapter, we provide an overview of various energy- and exergy-based efficiencies used in the analysis of power cycles, including vapor and gas power, cogeneration, geothermal power plants, and photovoltaic systems. The various approaches that can be used in defining efficiencies are identified and their implications discussed. Numerical examples are provided to illustrate the use of the different efficiencies, and the results include combined energy and exergy diagrams.


Mass Flow Rate Geothermal Water Exergy Analysis Exergy Efficiency Power Cycle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 27.
    E. Barbier, Nature and technology of geothermal energy: a review. Renew. Sust. Energ. Rev. Int. J. 1(2), 1–69 (1997)CrossRefGoogle Scholar
  2. 26.
    T.A. Brzustowski, A. Brena, Second law analyses of energy processes. IV – the exergy of hydrocarbon fuels. Trans. Can. Soc. Mech. Eng. 10(3), 121–128 (1986)Google Scholar
  3. 1.
    Y.A. Cengel, M.A. Boles, Thermodynamics: An Engineering Approach, 7th edn. (McGraw-Hill, New York, 2011)Google Scholar
  4. 28.
    R. DiPippo, Second law analysis of flash-binary and multilevel binary geothermal power plants. Geotherm. Res. Council Trans. 18, 505–510 (1994)Google Scholar
  5. 32.
    A.S. Joshi, Evaluation of cloudiness/haziness factor and its application for photovoltaic thermal (PV/T) system for Indian climatic conditions. Doctoral thesis, IIT Delhi/New Delhi/India, 2006Google Scholar
  6. 33.
    A.S. Joshi, I. Dincer, B.V. Reddy, Energetic and exergetic analyses of a photovoltaic system, in Proceedings of the Canadian Society for Mechanical Engineering Forum 2008 Conference. Paper Number 1569103179, Ottawa, 5–8 June 2008Google Scholar
  7. 34.
    A.S. Joshi, I. Dincer, B.V. Reddy, Performance analysis of photovoltaic systems: a review. Renew. Sust. Energ. Rev. (2009). doi:10.1016/j.rser.2009.01.009Google Scholar
  8. 24.
    M. Kanoglu, I. Dincer, Performance assessment of cogeneration plants. Energ. Convers. Manage 50, 76–81 (2009)CrossRefGoogle Scholar
  9. 6.
    M. Kanoglu, I. Dincer, M.A. Rosen, Understanding energy and exergy efficiencies for improved energy management in power plants. Energ. Policy 35, 3967–3978 (2007)CrossRefGoogle Scholar
  10. 25.
    M. Kanoglu, S.K. Isik, A. Abusoglu, Performance characteristics of a diesel engine power plant. Energ. Convers. Manage. 46, 1692–1702 (2005)CrossRefGoogle Scholar
  11. 29.
    M. Kanoglu, Exergy analysis of a dual-level binary geothermal power plant. Geothermics 31, 709–724 (2004)CrossRefGoogle Scholar
  12. 31.
    M. Kanoglu, Y.A. Cengel, Improving the performance of an existing binary geothermal power plant: a case study. Trans. ASME J. Energ. Res. Technol. 121(3), 196–202 (1999)CrossRefGoogle Scholar
  13. 30.
    J. Kestin, Available work in geothermal energy, in Sourcebook on the Production of Electricity from Geothermal Energy (U.S. Dept. of Energy, Washington, DC, 1980)CrossRefGoogle Scholar
  14. 22.
    W. Pulkrabek, Engineering Fundamentals of the Internal Combustion Engine, 2nd edn. (Prentice Hall, New York, 2004)Google Scholar
  15. 23.
    R.E. Sonntag, C. Borgnakke, G.J. Van Wylen, Fundamentals of Thermodynamics, 6th edn. (Wiley, New York, 2002)Google Scholar
  16. 10.
    J. Szargut, D.R. Morris, F.R. Steward, Exergy Analysis of Thermal, Chemical, and Metallurgical Processes (Hemisphere Publishing, New York, 1988)Google Scholar

Copyright information

© Mehmet Kanoğlu, Yunus A. Çengel, İbrahim Dinçer 2012

Authors and Affiliations

  • Mehmet Kanoğlu
    • 1
  • Yunus A. Çengel
    • 2
  • İbrahim Dinçer
    • 3
  1. 1.Department of Mechanical EngineeringUniversity of GaziantepGaziantepTurkey
  2. 2.Department of Mechanical EngineeringUniversity of NevadaRenoUSA
  3. 3.Department of Mechanical EngineeringUniversity of Ontario Institute of TechnologyOshawaCanada

Personalised recommendations