Universität zu Köln

Imre, Attila R. ORCID: 0000-0003-4604-5899, Quinones-Cisneros, Sergio E. ORCID: 0000-0002-2872-5033 and Deiters, Ulrich K. ORCID: 0000-0001-7669-5847 (2014). Adiabatic Processes in the Liquid-Vapor Two-Phase Region. 1. Pure Fluids. Ind. Eng. Chem. Res., 53 (34). S. 13529 - 13543. WASHINGTON: AMER CHEMICAL SOC. ISSN 0888-5885

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Abstract

Adiabatic processes in the liquid-vapor two-phase region were studied with several equations of state. The comparison of the resulting isentropes, particularly their patterns in quality (fraction of vapor phase) vs temperature diagrams, indicates that there are two different classes of fluids: One class shows a simple pattern where isentropes entering the two-phase region never leave it again; the other shows a more complicated pattern with reentrant isentropes, which may either cross the entire two-phase region or exhibit a retrograde behavior. The existence of these two classes can be related to the shapes of entropy-volume or temperature-entropy curves, and these in turn to the temperature dependence of ideal-gas heat capacities. The two-phase isentrope that runs to the critical point approaches it with an infinite slope in the quality-temperature diagram. The slope is positive for reference equations of state, but negative for all other equations of state used in this work.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Imre, Attila R. UNSPECIFIED orcid.org/0000-0003-4604-5899 UNSPECIFIED Quinones-Cisneros, Sergio E. UNSPECIFIED orcid.org/0000-0002-2872-5033 UNSPECIFIED Deiters, Ulrich K. UNSPECIFIED orcid.org/0000-0001-7669-5847 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-431827
DOI:	10.1021/ie5022688
Journal or Publication Title:	Ind. Eng. Chem. Res.
Volume:	53
Number:	34
Page Range:	S. 13529 - 13543
Date:	2014
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	0888-5885
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Physical Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language THERMODYNAMIC PROPERTIES; TECHNICAL APPLICATIONS; STATE; EQUATIONS; PRESSURES; NONPOLAR; WATER Multiple languages Engineering, Chemical Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/43182