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Comment on “The effects of heat transfer on the exergy efficiency of an air-standard Otto cycle” by Hakan Özcan, Heat and Mass Transfer (2011) 47:571–577

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Abstract

In this letter, it is shown that the applied relations in the paper by Hakan Özcan [H. Özcan, The effects of heat transfer on the exergy efficiency of an air-standard Otto cycle, Heat and Mass Transfer (2011) 47:571–577] are erroneous and thus the reported results are invalid. These incorrect relations [Eqs. (8), (9), (10), (14) and (16) of HÖ2011] are replaced by correct ones. Moreover, the obtained results (graphs and tables) are modified based on the correct relations. Finally, to achieve more realistic results, the internal irreversibility described by using the compression and expansion efficiencies is added to the analysis.

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Acknowledgments

We express our gratitude to the anonymous referees for their constructive reviews of the manuscript and for helpful comments.

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Authors and Affiliations

  1. Mechanical Engineering Department, Engineering Faculty of Bu-Ali Sina University, 65175-4161, Hamedan, Iran

    M. M. Rashidi

  2. University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai, Peoples Republic of China

    M. M. Rashidi

  3. Department of Mechanical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

    A. Mousapour

  4. Young Researchers and Elite Club, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran

    A. Hajipour

Authors
  1. M. M. Rashidi
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  2. A. Mousapour
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  3. A. Hajipour
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Corresponding author

Correspondence to M. M. Rashidi.

Additional information

A. Mousapour and A. Hajipour have contributed equally to this work.

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Rashidi, M.M., Mousapour, A. & Hajipour, A. Comment on “The effects of heat transfer on the exergy efficiency of an air-standard Otto cycle” by Hakan Özcan, Heat and Mass Transfer (2011) 47:571–577. Heat Mass Transfer 50, 1177–1183 (2014). https://doi.org/10.1007/s00231-014-1318-0

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  • DOI: https://doi.org/10.1007/s00231-014-1318-0

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