Numerical description of the real gas isentropic expansion for an ammonia-water vapor mixture

Kouremenos, DA; Kakatsios, XK

dc.contributor.author	Kouremenos, DA	en
dc.contributor.author	Kakatsios, XK	en
dc.date.accessioned	2014-03-01T02:48:20Z
dc.date.available	2014-03-01T02:48:20Z
dc.date.issued	1995	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/33744
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0029427731&partnerID=40&md5=233dd9f052d1b142ec3f05eccc3f8661	en
dc.subject.other	Ammonia	en
dc.subject.other	Binary mixtures	en
dc.subject.other	Computational methods	en
dc.subject.other	Computer simulation	en
dc.subject.other	Entropy	en
dc.subject.other	Iterative methods	en
dc.subject.other	Phase diagrams	en
dc.subject.other	Thermal expansion	en
dc.subject.other	Vapor pressure	en
dc.subject.other	Water	en
dc.subject.other	Dynamic pressure	en
dc.subject.other	Vapors	en
dc.title	Numerical description of the real gas isentropic expansion for an ammonia-water vapor mixture	en
heal.type	conferenceItem	en
heal.publicationDate	1995	en
heal.abstract	The present work involves the numerical calculation of the thermodynamic changes of an Ammonia-Water mixture in the vapor phase, along an isentropic expansion, considered as an ideal mixture of real components that has been followed numerically by a specially written computer program. Taking as input the NH3 Mass fraction ξ, the T and P values of the initial point, as well as the final temperature, the expansion was calculated for a temperature decrement of 1 °C with the entropy held constant with an accuracy better than 0.000001 kJ/kgK. The method used is iterative and the temperature step is variable and self adjusted to assure short time and accuracy. The properties calculated and presented in this paper are: P/Po Reduced Pressure. T/To Reduced Temperature. Vo/V Reduced Volume. A/A Reduced Cross-Sectional Area. C/2C Reduced Velocity. pC2/2Po Reduced Dynamic Pressure. J/J Reduced Impulse Function. The index o indicates the initial stagnation point and the superscript indicates the critical point were Mach = 1. The results obtained were in the form of diagrams showing a dependence of the isentropic exponents to both the initial pressure and NH3 mass fraction ξ while the other properties examined, depend on varying degrees upon ξ.	en
heal.publisher	ASME, New York, NY, United States	en
heal.journalName	American Society of Mechanical Engineers, Advanced Energy Systems Division (Publication) AES	en
dc.identifier.volume	35	en
dc.identifier.spage	297	en
dc.identifier.epage	303	en