Properties of new refrigerants and predictions for condensation heat transfer enhancement with low-finned tubes

Stegou-Sagia, A

dc.contributor.author	Stegou-Sagia, A	en
dc.date.accessioned	2014-03-01T01:12:12Z
dc.date.available	2014-03-01T01:12:12Z
dc.date.issued	1996	en
dc.identifier.issn	0360-5442	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12008
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.other	fins	en
dc.subject.other	heat transfer	en
dc.subject.other	refrigerants	en
dc.subject.other	Chlorine compounds	en
dc.subject.other	Condensation	en
dc.subject.other	Fluorine compounds	en
dc.subject.other	Heat transfer	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Organic compounds	en
dc.subject.other	Thermodynamic properties	en
dc.subject.other	Tubes (components)	en
dc.subject.other	Low-finned tubes	en
dc.subject.other	Refrigerants	en
dc.title	Properties of new refrigerants and predictions for condensation heat transfer enhancement with low-finned tubes	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0360-5442(96)00069-2	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0360-5442(96)00069-2	en
heal.language	English	en
heal.publicationDate	1996	en
heal.abstract	The present article provides a review of thermophysical properties research of environmentally acceptable refrigerants. In recent years, it has become evident that common CFC type refrigerants can cause serious environmental damage when released into the atmosphere. The group of HFCs (HFC-32, HFC-125, HFC-134a, HFC-152a) with no chlorine atom in their chemical formulae and quite short atmospheric lifetime may be promising alternatives to CFCs. A compilation of properties is given which may be used to obtain arithmetic expressions for the vapour pressure, saturated liquid density, viscosity, latent heat of vaporization, saturated liquid thermal conductivity, and surface tension of these hydrofluorocarbons. For easily available comparisons, the results are presented in diagrams illustrating the dependence of thermophysical data on temperature at the saturated state. Heat-transfer predictions are specified for condensation of the HFCs on horizontal integral-fin tubes with rectangular fins. Parameters investigated include fin and tube geometry, etc. This study should be a useful input in developing new condensers with new refrigerants. Copyright (C) 1996 Elsevier Science Ltd.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Energy	en
dc.identifier.doi	10.1016/0360-5442(96)00069-2	en
dc.identifier.isi	ISI:A1996VU36400015	en
dc.identifier.volume	21	en
dc.identifier.issue	12	en
dc.identifier.spage	1189	en
dc.identifier.epage	1199	en