Compressibility charts for gases with different acentric factors and evaluation of the Redlich-Kwong-Soave equation of state

Kouremenos, DA; Antonopoulos, KA

dc.contributor.author	Kouremenos, DA	en
dc.contributor.author	Antonopoulos, KA	en
dc.date.accessioned	2014-03-01T01:08:17Z
dc.date.available	2014-03-01T01:08:17Z
dc.date.issued	1991	en
dc.identifier.issn	0015-7899	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10393
dc.subject	Critical Point	en
dc.subject	Equation of State	en
dc.subject.classification	Engineering, Multidisciplinary	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	Equations of State--Gases	en
dc.subject.other	Nomograms--Compressibility	en
dc.subject.other	Acentric Factor	en
dc.subject.other	Compressibility Charts	en
dc.subject.other	Real Gases	en
dc.subject.other	Gases	en
dc.title	Compressibility charts for gases with different acentric factors and evaluation of the Redlich-Kwong-Soave equation of state	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/BF02561416	en
heal.identifier.secondary	http://dx.doi.org/10.1007/BF02561416	en
heal.language	English	en
heal.publicationDate	1991	en
heal.abstract	The Redlich-Kwong-Soave generalized equation of state is transformed into a dimensionless form, which permits plotting of one compressibility chart for each value of the acentric factor omega. Such charts are provided for various values of omega in the range omega = 0-0.6. A systematic evaluation of the Redlich-Kwong-Soave equation is made by comparison with the latest version of the generalized compressibility chart given by Nelson and Obert. It is found that for omega = 0, the Redlich-Kwong-Soave compressibility chart agrees well with the Nelson-Obert chart, apart from a small region near the critical point: For values of the reduced pressure p(r) < 1, the relative ercompressibility factor z is less than about 1%. For reduced pressures and temperatures in the ranges 1 less-than-or-equal-to p(r) less-than-or-equal-to 8 and 1 less-than-or-equal-to T(r) less-than-or-equal-to 3.5, respectively, it is found e less-than-or-equal-to 1% at the higher values of T(r), e less-than-or-equal-to 5% at the intermediate T(r) and e less-than-or-equal-to 10% at the lower T(r). The highest disagreement is observed near the critical point (p(r) = T(r) = 1). Moreover, the exact compressibility chart of the real air is developed, based on its exact equation of state, and compared with the Redlich-Kwong-Soave compressibility chart for omega = 0.	en
heal.publisher	Springer-Verlag	en
heal.journalName	Forschung im Ingenieurwesen	en
dc.identifier.doi	10.1007/BF02561416	en
dc.identifier.isi	ISI:A1991GD44000004	en
dc.identifier.volume	57	en
dc.identifier.issue	5	en
dc.identifier.spage	158	en
dc.identifier.epage	161	en