Numerical evaluation of alternate tube configurations for particle deposition rate reduction in heat exchanger tube bundles

Bouris, D; Papadakis, G; Bergeles, G

dc.contributor.author	Bouris, D	en
dc.contributor.author	Papadakis, G	en
dc.contributor.author	Bergeles, G	en
dc.date.accessioned	2014-03-01T01:16:49Z
dc.date.available	2014-03-01T01:16:49Z
dc.date.issued	2001	en
dc.identifier.issn	0142-727X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14239
dc.subject	Fouling	en
dc.subject	Heat exchangers	en
dc.subject	Numerical simulation	en
dc.subject	Tube bundles	en
dc.subject	Vortex shedding	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.classification	Mechanics	en
dc.subject.other	Computer simulation	en
dc.subject.other	Heat transfer	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Turbulent flow	en
dc.subject.other	Deposition rate	en
dc.subject.other	Heat exchangers	en
dc.subject.other	deposition	en
dc.subject.other	fouling	en
dc.subject.other	heat exchanger	en
dc.subject.other	mathematical modeling	en
dc.subject.other	vortex shedding	en
dc.title	Numerical evaluation of alternate tube configurations for particle deposition rate reduction in heat exchanger tube bundles	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0142-727X(01)00110-2	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0142-727X(01)00110-2	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	The potential of two passive techniques, namely elliptic-shaped tubes and asymmetric tube bundle arrangement, for deposition rate reduction in lignite-fired utility boiler heat exchangers is numerically studied through comparison with an in-line tube arrangement with circular tubes. The simulation is based on a two-dimensional calculation of the turbulent two-phase flow in heat exchanger tube bundles using a subgrid-scale model for the small-scale turbulent structures and a particle adhesion model for the particle-surface interaction. Large-scale motion is found to be an important mechanism for tube surface fouling. Of the three tube bundle arrangements that were studied, the in-line tube bundle with elliptic-shaped tubes shows the lowest fouling rates and pressure drop. Taking advantage of these, heat transfer rates might be increased by placing more rows in the same area. (C) 2001 Elsevier Science Inc. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE INC	en
heal.journalName	International Journal of Heat and Fluid Flow	en
dc.identifier.doi	10.1016/S0142-727X(01)00110-2	en
dc.identifier.isi	ISI:000170716600006	en
dc.identifier.volume	22	en
dc.identifier.issue	5	en
dc.identifier.spage	525	en
dc.identifier.epage	536	en