Binary and ternary blends of R-134a as alternative refrigerants to R-22

Stegou-Sagia, A; Damanakis, M

dc.contributor.author	Stegou-Sagia, A	en
dc.contributor.author	Damanakis, M	en
dc.date.accessioned	2014-03-01T01:15:29Z
dc.date.available	2014-03-01T01:15:29Z
dc.date.issued	2000	en
dc.identifier.issn	0196-8904	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13539
dc.subject	R-32/R-134a mixtures	en
dc.subject	R-407c	en
dc.subject	thermodynamic properties	en
dc.subject	isentropic exponents	en
dc.subject	coefficient of performance	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Mechanics	en
dc.subject.classification	Physics, Nuclear	en
dc.subject.other	VAPOR-LIQUID-EQUILIBRIUM	en
dc.subject.other	MIXTURES	en
dc.subject.other	R134A	en
dc.subject.other	R125	en
dc.title	Binary and ternary blends of R-134a as alternative refrigerants to R-22	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0196-8904(99)00191-0	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0196-8904(99)00191-0	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	Refrigerant mixtures may be used to solve the ozone layer depletion problem as they offer the optimum combination of favorable technical performance with environmentally acceptable behavior. This work reports the thermodynamic properties and characteristics of the binary mixtures R-32/R-134a in compositions 20 80%, 30-70%, 40-60% by mass and of the ternary mixture R-407c: 23 wt% R-32 + 25 wt% R-125 + 52 wt% R-134a, A computer code has been developed for the phase equilibrium relationship of the binary mixtures using related activity and fugacity coefficients. Our results are in good agreement with existing experimental data. For the ternary blend, we present enthalpy and entropy correlations, diagrams illustrating the real gas behavior by means of k-type isentropic change exponents (k = c(p)/c(v), k(p),v,k(t),v,k(p),T) and figures for the refrigerating systems efficiency expressed by coefficient of performance values. (C) 2000 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	ENERGY CONVERSION AND MANAGEMENT	en
dc.identifier.doi	10.1016/S0196-8904(99)00191-0	en
dc.identifier.isi	ISI:000087013600002	en
dc.identifier.volume	41	en
dc.identifier.issue	13	en
dc.identifier.spage	1345	en
dc.identifier.epage	1359	en