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The Misleading Use of “Enthalpy” in an Energy Conversion Analysis
Institute for Thermo-Fluid Dynamics, Hamburg University of Technology, Hamburg, Germany
- 1 Institute for Thermo-Fluid Dynamics, Hamburg University of Technology, Hamburg, Germany
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Abstract
The frequently used thermodynamic state quantity enthalpy H turns out to be very problematic when applied in an energy conversion analysis. Due to the fact that H combines two terms, the internal energy U and the product p V , the interpretation of what H means in physical terms is often obscure and leads to various misinterpretations. Several examples are given and interpreted twice,i.e.with and without referring to enthalpy .
KeywordsEnthalpy MisinterpretationEnergy Conversion Analysis
- Moran, M.J. and Shapiro, H.N. (1996) Fundamentals of Engineering Thermodynamics. Wiley and Sons, New York.
- Cengel, Y. (1997) Introduction to Thermodynamics and Heat Transfer. McGraw-Hill Companies, New York.
- Warhaft, Z. (1997) An Introduction to Thermal-Fluid Engineering. Cambridge University Press, Cambridge.
- Herwig, H. (2006) Strömungsmechanik. Springer-Verlag, Berlin.
- Herwig, H. and Schmandt, B. (2014) How to Determine Losses in a Flow Field: A Paradigm Shift towards the Second Law Analysis. Entropy, 16, 2959-2989. http://dx.doi.org/10.3390/e16062959