TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
Study of Heat Transfer for a Fixed Bed of Cylindrical Particles
(Studiul transferului de căldură pentru un strat fix de particule cilindrice)
Vol LXII • No. 3A/2010
Maria Popa, Loredana Negoiţă, Sînziana Rădulescu
Petroleum - Gas University of Ploiesti, Bd. Bucuresti, 39, Ploiesti, Romania
e-mail: mariapopa2007@gmail.com

 Keywords   heat transfer, cylindrical particles beds, convection.

 Abstract
In the present paper appear to continue a study on heat transfer by convection in a fixed bed of particles. Were studied cylindrical particles made of alumina, with geometrical characteristics well defined by the ratio H/D =8/3,2 mm. The particles are situated inside the tube of a coaxial heat exchanger. Were established the criterial relationship for calculating the partial coefficient of heat transfer fluid - solid particles by convection.

 Rezumat
În lucrarea de faţă se prezintă continuarea unui studiu privind transferul de căldură prin convecţie într-un strat fix de particule. S-au studiat particule cilindrice din alumină, cu caracteristici geometrice bine definite, cu raportul H / D = 8/3,2 mm. Particulele sunt situate în interiorul tubului interior al unui schimbător de căldură cu tuburi coaxiale. S-a stabilit o relaţie criterială pentru calculul coeficientului parţial de transfer de căldură prin convecţie între fluid şi particulele solide.



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