Improving the hydraulic efficiency of water process tanks using CFD models

Stamou, AI

dc.contributor.author	Stamou, AI	en
dc.date.accessioned	2014-03-01T01:28:40Z
dc.date.available	2014-03-01T01:28:40Z
dc.date.issued	2008	en
dc.identifier.issn	0255-2701	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18907
dc.subject	CFD (computational fluid dynamics)	en
dc.subject	CFX	en
dc.subject	Chlorination	en
dc.subject	FTC (flow through curves)	en
dc.subject	Process tanks	en
dc.subject	RTD (residence time distribution)	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Chlorination	en
dc.subject.other	Computation theory	en
dc.subject.other	Computational fluid dynamics	en
dc.subject.other	Computational geometry	en
dc.subject.other	Disinfection	en
dc.subject.other	CFX	en
dc.subject.other	Flow through curves (FTC)	en
dc.subject.other	Process tanks	en
dc.subject.other	Residence time distribution (RTD)	en
dc.subject.other	Process control	en
dc.subject.other	Chlorination	en
dc.subject.other	Computation theory	en
dc.subject.other	Computational fluid dynamics	en
dc.subject.other	Computational geometry	en
dc.subject.other	Disinfection	en
dc.subject.other	Process control	en
dc.title	Improving the hydraulic efficiency of water process tanks using CFD models	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.cep.2007.02.033	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.cep.2007.02.033	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	The hydraulic efficiency of water process tanks can be significantly improved by performing simple modifications in the initial geometries of the tanks. This concept was applied in the main tanks of the water supply network of Athens, which are used for disinfection. Various modified geometries were formulated by ""inserting"" guiding walls in these tanks, a very common, simple and inexpensive modification. The hydraulic efficiency of the tanks was assessed with a CFD model, which calculated the flow fields and the flow through curves (FTCs) for the initial and the modified geometries. From the comparison of the results the following conclusions were drawn: (1) the flow for the initial geometries was characterized by high levels of short-circuiting, large re-circulation regions and high degrees of mixing, and (2) the use of guiding walls created flow fields in the tanks with significant volumes of ""plug flow"", reduced short-circuiting, smaller re-circulation regions and thus less mixing. The modified geometries showing the best hydraulic efficiency were proposed for construction. This procedure, which can be applied in the all types of water tanks, resulted in significant cost savings, because the modifications were examined with the CFD model, prior to their actual implementation in the real tanks. © 2007 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	Chemical Engineering and Processing: Process Intensification	en
dc.identifier.doi	10.1016/j.cep.2007.02.033	en
dc.identifier.isi	ISI:000257050800001	en
dc.identifier.volume	47	en
dc.identifier.issue	8	en
dc.identifier.spage	1179	en
dc.identifier.epage	1189	en