Two-parameter thermodynamic method for the description of irreversible processes in two-phase binary mixture parallel-flow units

Kouremenos, DA; Rogdakis, ED; Houzouris, GE

dc.contributor.author	Kouremenos, DA	en
dc.contributor.author	Rogdakis, ED	en
dc.contributor.author	Houzouris, GE	en
dc.date.accessioned	2014-03-01T02:48:12Z
dc.date.available	2014-03-01T02:48:12Z
dc.date.issued	1993	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/33630
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0027841278&partnerID=40&md5=54343d4ae2fdc1bc30b2d08bf3e7c0ef	en
dc.subject.other	Ammonia	en
dc.subject.other	Entropy	en
dc.subject.other	Heat transfer	en
dc.subject.other	Mass transfer	en
dc.subject.other	Mathematical models	en
dc.subject.other	Mixtures	en
dc.subject.other	Parameter estimation	en
dc.subject.other	Two phase flow	en
dc.subject.other	Water	en
dc.subject.other	Inviscid flow	en
dc.subject.other	Irreversible processes	en
dc.subject.other	Liquid delay	en
dc.subject.other	Liquid vapor heat exchange delay	en
dc.subject.other	Two parameter thermodynamic method	en
dc.subject.other	Vapor delay	en
dc.subject.other	Thermodynamics	en
dc.title	Two-parameter thermodynamic method for the description of irreversible processes in two-phase binary mixture parallel-flow units	en
heal.type	conferenceItem	en
heal.publicationDate	1993	en
heal.abstract	An actual process of a two-phase parallel-flow of a binary mixture with heat exchange to its surroundings is followed by an internal entropy production due to several kinds of irreversibilities which occur inside the flow. Such irreversibilities in actual processes provoke mass fraction deviations from equilibrium, temperature deviations between the two phases and pressure drop. In the present work the flow is assumed to be inviscid (no pressure drop) and the mass fraction and temperature deviations from equilibrium are related to mass and heat exchange delay between the two phases. Based on this criterium of `delay', a thermodynamic method is developed, according to which the determination of an actual state of the process is governed by two parameters: (i) the `degree of vapour delay' or the `degree of liquid delay' and (ii) the `degree of liquid-vapour heat exchange delay'. These two parameters both confine the actual process between two extreme processes: the process of no delay (reversible-successive equilibrium states) and the process of total delay (irreversible of maximum delay). As an application of this method, the evaporation and condensation processes of NH3/H2O liquid-vapour mixture are considered and entropy quality indices of these processes are calculated.	en
heal.publisher	Publ by ASME, New York, NY, United States	en
heal.journalName	American Society of Mechanical Engineers, Advanced Energy Systems Division (Publication) AES	en
dc.identifier.volume	30	en
dc.identifier.spage	149	en
dc.identifier.epage	155	en