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Impact of Degrees of Freedom of Polyatomic Ideal Gas on Efficiency of Three-Stroke-Cycle Heat Engines
University College, The Pennsylvania State University, York, PA, USA
- 1 University College, The Pennsylvania State University, York, PA, USA
Journal of Modern Physics·Volume 09 (2018)·Pages 1807–1813·Published 31 July 2018·DOI10.4236/jmp.2018.99114
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Abstract
It is customary to evaluate the efficiency of four-stroke-cycle heat engines such as Carnot, Otto and Diesel with a working ideal gas [1] [2] [3]. Here we consider various three-stroke-cycle heat engines that are composed of three out of four special processes: adiabatic, isothermal, isobaric and isochoric. We deviate from the customary norm considering the working material to be a polyatomic ideal gas with various degrees of freedom. We develop analytic expressions for the efficiency of each design as a function of degrees of freedom. For suitable practical values of relevant ( V , P , T ), we evaluate the corresponding efficiencies.
KeywordsEfficiency of Heat EngineThree-Stroke-CycleAdiabaticIsothermal Pro-cesses
- Longair, M.S. (1994) Theoretical Concepts in Physics. Cambridge University Press.
- Wolfgang, D. and Westfall, G. (2011) University Physics with Modern Physics. McGraw-Hill.
- Halliday, D., Resnick, R. and Walkers, J. (2011) Fundamentals of Physics. 9th Edition, John Wiley & Sons.
- Marion, J. and Hornyak, W. (1984) Principle of Physics. Saunders College Publishing.
- Tipler, P. and Mosca, G. (2008) Physics for Scientists and Engineers. 6th Edition, W.H. Freeman and Company.
- Sarafian, H. (IMS2003) Proceedings of the 5th International Mathematica Symposium, Imperial College London Press, London.
- Wolfram, S. (1996) Mathematica Book. 3rd Edition, Cambridge University Press, Cambridge.
- Sarafian, H. (2015) Mathematica Graphics Example Book for Beginners. Scientific Research Publishing.