A realistic approach to model LiBr-H2O smooth falling film absorption on a vertical tube

Rogdakis, ED; Papaefthimiou, VD; Karampinos, DC

dc.contributor.author	Rogdakis, ED	en
dc.contributor.author	Papaefthimiou, VD	en
dc.contributor.author	Karampinos, DC	en
dc.date.accessioned	2014-03-01T01:18:33Z
dc.date.available	2014-03-01T01:18:33Z
dc.date.issued	2003	en
dc.identifier.issn	1359-4311	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15084
dc.subject	Absorption	en
dc.subject	Coolant	en
dc.subject	Heat of absorption	en
dc.subject	Real gas	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.classification	Mechanics	en
dc.subject.other	Absorption	en
dc.subject.other	Coolants	en
dc.subject.other	Electrolysis	en
dc.subject.other	Lithium compounds	en
dc.subject.other	Pressure effects	en
dc.subject.other	Reynolds number	en
dc.subject.other	Thermal effects	en
dc.subject.other	Real gas	en
dc.subject.other	Heat transfer	en
dc.title	A realistic approach to model LiBr-H2O smooth falling film absorption on a vertical tube	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S1359-4311(03)00188-1	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S1359-4311(03)00188-1	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	A detailed model is developed for treating the 2-D water vapour absorption into an aqueous solution of LiBr, which is flowing over a vertical tube. Numerical predictions are presented for the spatial variation of solution temperature and concentration in the axial direction and within the LiBr-H 2O falling film taking into account the flow and temperature rise of coolant inside the tube. Special care was given to the adequate description of the thermodynamic properties of superheated water vapour, which is treated as a real gas. Emphasis was also given in demonstrating the electrolytic nature of the aqueous solution, introducing thus the effect of variable heat of absorption on the temperature field. A parametric study for examining the effect of absorption pressure, solution mass flow rate and inlet coolant temperature on the absorption process was carried out implementing the model under laminar flow conditions. A good coincidence with experimental observations obtained for solution flows with Re<150 was witnessed, acknowledging thus the predictive capability of the numerical model. © 2003 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Applied Thermal Engineering	en
dc.identifier.doi	10.1016/S1359-4311(03)00188-1	en
dc.identifier.isi	ISI:000185939600009	en
dc.identifier.volume	23	en
dc.identifier.issue	17	en
dc.identifier.spage	2269	en
dc.identifier.epage	2283	en