Ozone friendly binary blends R 32/R 134a and the ternary R 407b

Stegou-Sagia, A; Kakatsios, X; Damanakis, M

dc.contributor.author	Stegou-Sagia, A	en
dc.contributor.author	Kakatsios, X	en
dc.contributor.author	Damanakis, M	en
dc.date.accessioned	2014-03-01T01:21:12Z
dc.date.available	2014-03-01T01:21:12Z
dc.date.issued	2004	en
dc.identifier.issn	0360-5442	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16131
dc.subject	Equation of State	en
dc.subject	Ozone	en
dc.subject	Specific Heat	en
dc.subject	Thermodynamic Properties	en
dc.subject	Thermodynamics	en
dc.subject	Peng Robinson	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.other	VAPOR-LIQUID-EQUILIBRIUM	en
dc.subject.other	REFRIGERANTS	en
dc.subject.other	MIXTURES	en
dc.subject.other	R-134A	en
dc.subject.other	R134A	en
dc.subject.other	R125	en
dc.title	Ozone friendly binary blends R 32/R 134a and the ternary R 407b	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.energy.2004.03.030	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.energy.2004.03.030	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	The objective of this paper is to present thermodynamic properties and characteristics of the binary refrigerant mixtures R 32/R 134a in compositions 20/80%, 30/70%, 40/60% by mass and of the ternary mixture R 407b: 10 wt% R 32 + 70 wt% R 125 + 20 wt% R 134a. A computer code has been developed and by use of a Peng-Robinson type equation of state, PVT data for all working fluids are determined. Based on the thermodynamics theory, analytical relationships for the enthalpy, entropy, constant pressure and constant volume specific heats as well as for k-type isentropic change exponents are given. Furthermore, comparisons are provided by means of diagrams illustrating the influence of state conditions on the k-type exponents k(p,V), k(T,V), k(p,T), and classical k (k = c(P)/c(V)). A systematic study has also been carried out and the data obtained are plotted for a better physical feeling related to the sound velocity of real gas for the R 32/R 134a blend in composition 20/80%. The results are compared with corresponding ones of the ternary R 407b. (C) 2004 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	ENERGY	en
dc.identifier.doi	10.1016/j.energy.2004.03.030	en
dc.identifier.isi	ISI:000224762400049	en
dc.identifier.volume	29	en
dc.identifier.issue	12-15	en
dc.identifier.spage	2537	en
dc.identifier.epage	2552	en