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Computer generated phase diagrams for ethylene and propylene

✍ Scribed by K.R Jolls; G.P Willers

Publisher: Elsevier Science
Year: 1978
Tongue: English
Weight: 846 KB
Volume: 18
Category: Article
ISSN: 0011-2275
DOI: 10.1016/0011-2275(78)90077-2

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✦ Synopsis

A method which uses computer graphics to construct pictorial views of three-dimensional thermodynamic phase diagrams is demonstrated. Pressure-volume-temperature diagrams are presented for ethylene and propylene so that quantitative comparisons can be made between the phase surfaces representing the ideal gas law, the Redlich-Kwong equation and a highly accurate, 20~constant equation of state proposed by Bender. Pictorial views of enthalpy-entropy-pressure diagrams for ethylene based solely on P-V-T relations and ideal gas heat capacities are also shown along with their Mollier projections. Interesting comparisons that confirm our understanding of equations of state are made with H-S-P diagrams that represent the properties of an ideal gas in contrast to those of a Redlich-Kwong fluid. Reference is made to earlier papers that describe the computer graphics algorithms in detail.

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