Three-parameter corresponding-states correlations for joule-thomson inversion curves

• Published in: International journal of thermophysics Vol. 20; no. 6; pp. 1737 - 1751
• Main Authors: CASTILLO, M. G, COLINA, C. M, DUBUC, J. E, OLIVERA-FUENTES, C. G
• Format: Conference Proceeding Journal Article
• Language: English
• Published: New York, NY Springer 01.11.1999
• Subjects: Applied sciences; Correlation methods; Density (specific gravity); Energy; Energy. Thermal use of fuels; Equations of state; Exact sciences and technology; Fluids; Refrigerants; Refrigerating engineering; Refrigerating engineering. Cryogenics. Food conservation; Thermodynamic properties; Correlation; Temperature; Equations of state; Joule Thomson coefficient; Pressure; Refrigerant fluid
• ISSN: 0195-928X; 1572-9567
• DOI: 10.1023/A:1022662030434

In the present work, the Lee-Kesler (LK) and Boublik-Alder-Chen-Kreglewski (BACK) equations of state were used to compute Joule-Thomson inversion curves for nonsimple fluids. Comparisons with available data showed that predictions were quite reliable and could be used in place of experimental values. Two sets of corresponding-states correlations were developed, giving reduced inversion pressures and densities as functions of reduced temperature and acentric factor. The LK-based correlations are valid for T sub(r) less than or equal to 4.0, giving an average absolute deviation (AAD) of 4.5% for pressures. The BACK-based correlations are valid up to the maximum inversion temperature and give a 6.7% AAD for pressures. Respective volume AADs are 12.0 and 8.0% in the high-density region.