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A Proposal of a Correlation of the Enthalpy of Vaporization for Pure Substances and Performance Comparison of Correlations  

Lee, Kyoung-Youl (Graduate School, Kookmin University)
Park, Kyoung-Kuhn (School of Mechanical and Automotive Engineering, Kookmin University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.17, no.12, 2005 , pp. 1185-1191 More about this Journal
Abstract
Published correlation equations of the enthalpy of vaporization are reviewed and a new four-parameter correlation equation is proposed. Performance of the proposed equation is examined using the ASHRAE data for 22 pure substance refrigerants as reference data. The new equation yields an average absolute deviation of $0.05\%$, which is smaller than those of published equations, such as equations of Guermouche-Vergnaund $(0.08\%)$, Aerebrot $(0.13\%)$, Radoz-Lydersen $(0.08\%)$, and Somayajulu $(0.08\%)$. The three adjustable parameters of the modified correlation are optimized and reported for 22 substances. The equation proposed in this work is valid over the entire temperature range where data points exist.
Keywords
Correlation; Watson equation; Enthalpy of vaporization; Refrigerant;
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