JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Thermodynamic Analysis of the Diabatic Efficiency of Turbines and Compressors
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Thermodynamic Analysis of the Diabatic Efficiency of Turbines and Compressors
Park, Kyoung Kuhn;
  PDF(new window)
 Abstract
Thermodynamic analysis is conducted on the first-order approximation model for turbines and compressors. It is shown that the adiabatic efficiency could be greater than unity, depending on the entropic mean temperature, entropy generation, thermal reservoir temperature, and heat transfer. Therefore, adiabatic efficiency applied to a diabatic control volume results in an error overestimating its performance. To resolve this overestimation, it is suggested that a reversible diabatic process be referred to as an ideal process to evaluate diabatic efficiency. The diabatic efficiency suggested in this work is proven to always be less than unity and it is smaller than the exergy efficiency in most cases. The diabatic efficiency could be used as a more general definition of efficiency, which would include adiabatic efficiency.
 Keywords
Adiabatic Efficiency;Diabatic Efficiency;Exergy Efficiency;Turbine;Compressor;Diabatic Process;
 Language
Korean
 Cited by
 References
1.
Cengel, Y. A. and Boles, M. A., 2015, Thermodynamics: An Engineering Approach, 8th Ed., McGraw-Hill, New York.

2.
Borgnakke, C. and Sonntag, R. E., 2014, Fundamentals of Thermodynamics, 8th Ed., SI Version, John Wiley & Sons, Hoboken.

3.
Moran, M. J., Shapiro, H. N., Boettner, D. D. and Bailey, M. B., 2012, Principles of Engineering Thermodynamics, 7th Ed., SI Version, John Wiley & Sons, Hoboken.

4.
Casey, M. V. and Fesich, T. M., 2010, "The Efficiency of Turbocharger Compressors with Diabatic Flows," Journal of Engineering for Gas Turbines and Power, Vol. 132, No. 7, 072302. crossref(new window)

5.
Verstraete, D. and Hewakuruppu, Y., 2012, "Impact of Heat Transfer on Centrifugal Compressors of Micro Turbines" In: ASME 2012 International Mechanical Engineering Congress and Exposition, American Society of Mechanical Engineers, pp. 983-991.

6.
Sirakov, B. and Casey, M., 2013, "Evaluation of Heat Transfer Effects on Turbocharger Performance," Journal of Turbomachinery, Vol. 135, No. 2, 021011.

7.
Kaufmann, A., 2014, "Using Turbocharger Maps in Gas Exchange Simulation and Engine Control Units," Forschung im Ingenieurwesen, Vol. 78, No. 1-2, pp. 45-57. crossref(new window)

8.
Kim, M., Im, J. and Kim, Y., 2015, "A Study for Efficiency Definition of a High Pressure Cooled Turbine," 2015 KSPE Spring Conference, pp. 424-431.

9.
Herold, K. E., Radermacher, R. and Klein, S. A., 1996, Absorption Chillers and Heat Pumps, CRC Press, pp. 13-14.