Estimation of bed expansions in a freely-bubbling three-dimensional gas-fluidized bed

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dc.contributor.authorHepbasli, A
dc.date.accessioned2019-10-27T11:51:25Z
dc.date.available2019-10-27T11:51:25Z
dc.date.issued1998
dc.departmentEge Üniversitesien_US
dc.description.abstractKnowledge of bed expansions is important in the design and operation of gas-solid fluidized beds. This paper presents a study on the estimation of expanded bed height in a large three-dimensional gas-fluidized bed with a square section of 0.61 x 0.61 m(2). All experiments were performed at the freely bubbling mode and the bed expansions were recorded by a video camera. Bed materials were used 593 mu m raw perlite and 1233 mu m sand falling within the categories of Geldart's Groups B and D, respectively. The bed height at minimum fluidization ranged from 0.0398 to 0.3176 m, while the excess air velocity from 0.034 m s(-1) to 0.7453 m s(-1). Equations related to the bed expansion were given using a modified form of two-phase theory of fluidization. A correlation for the average bed expansion (void fraction) was also presented that has been derived from the principal form found successful in gas-liquid systems as follows: R = 0.5482 d(p)(-0.129) (U-o - U-mf)(0.111) with an average deviation of less than 1%. The experimental findings were compared with previously reported results and were discussed in the light of available correlations. (C) 1998 John Wiley & Sons, Ltd.en_US
dc.identifier.doi10.1002/(SICI)1099-114X(199812)22:15<1365
dc.identifier.endpage1380en_US
dc.identifier.issn0363-907X
dc.identifier.issn0363-907Xen_US
dc.identifier.issue15en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage1365en_US
dc.identifier.urihttps://doi.org/10.1002/(SICI)1099-114X(199812)22:15<1365
dc.identifier.urihttps://hdl.handle.net/11454/34553
dc.identifier.volume22en_US
dc.identifier.wosWOS:000077450700005en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherJohn Wiley & Sons Ltden_US
dc.relation.ispartofInternational Journal of Energy Researchen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectfluidized beds (gas-solid)en_US
dc.subjectexpanded bed heighten_US
dc.subjectbed expansion ratioen_US
dc.titleEstimation of bed expansions in a freely-bubbling three-dimensional gas-fluidized beden_US
dc.typeArticleen_US

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