Abstract
A global Helmholtz function accurately representing the thermodynamic properties of isobutane-isopentane mixtures over a wide range of temperatures and pressures has been developed. The Helmholtz function has been used for the generation by computer of tables and charts of properties of interest to designers of power cycles. This Helmholtz function has also been extended to allow for additional components in the mixture, thus enabling the accurate calculation of corrections to the thermodynamic properties when impurities are present in significant amounts.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
M. Waxman and J. S. Gallagher, Proceedings 8th Symposium on Thermophysical Properties, J. V. Sengers, ed. (ASME, New York, 1982), Vol. I, p. 88.
M. Waxman and J. S. Gallagher, J. Chem. Eng. Data 28:224 (1983).
J. Kestin, J. V. Sengers, B. Kamgar-Parsi, and J. M. H. Levelt Sengers, J. Phys. Chem. Ref. Data 13:175 (1984).
J. M. H. Levelt Sengers, B. Kamgar-Parsi, and J. V. Sengers, J. Chem. Eng. Data 28:354 (1983).
J. S. Galiagher, J. M. H. Levelt Sengers, G. Morrison, and J. V. Sengers, Thermodynamic Properties of Isobutane-Isopentane Mixtures from 240 to 600 K and up to 20 MPa, NBSIR 84–2971 (1984).
J. S. Rowlinson and I. D. Watson, Chem. Eng. Sci. 24:1565 (1969).
J. W. Leach, P. S. Chappelear, and T. W. Leland, AIChE J. 14:586 (1968).
T. W. Leland and P. S. Chappelear, Ind. Eng. Chem. 60:15 (1968).
S. Young, Proc. Phys. Soc. Lond. 13:602 (1895).
J. M. H. Levelt Sengers, Private communication.
D. E. Diller, J. S. Gallagher, B. Kamgar-Parsi, G. Morrison, J. C. Rainwater, J. M. H. Levelt Sengers, J. V. Sengers, L. J. van Poolen, and M. Waxman, Thermophysical Properties of Working Fluids for Binary Geothermal Power Cycles, NBSIR, 85–3124 (1985).
W. M. Haynes and R. D. Goodwin, Thermophysical Properties of Normal Butane from 135 to 700 K at Pressures to 70 MPa, NBS Monograph 169 (U.S. Government Printing Office), Washington, D.C., 1982).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Gallagher, J.S. An equation of state for isobutane-isopentane mixtures with corrections for impurities. Int J Thermophys 7, 923–933 (1986). https://doi.org/10.1007/BF00503848
Issue Date:
DOI: https://doi.org/10.1007/BF00503848