The effect of solid bed dispersity on the contact heat transfer in rotary drums

Show simple item record Nafsun, A.I. en Herz, F. en 2017-08-28T07:08:05Z 2017-08-28T07:08:05Z 2016 en
dc.description Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016. en
dc.description.abstract Experimental work was conducted to study the influence of bulk bed dispersity on contact heat transfer. The contact heat transfer between the inner drum wall to the covered surface of the solid bed was experimentally investigated in an indirectly heated rotary drum with a diameter of D = 0.6 m and a length of L = 0.45 m. The temperature of the inner drum wall and the solid bed were measured by K-type thermocouples assembled on a rod, upon which these thermocouples were specifically arranged at different radial distances from the inner wall. Experiments have been carried out with glass beads as the test material, with systems defined as monodisperse, bidisperse and polydisperse and with different particle size ratios. The operating parameters, rotational speed and filling degree are varied in the range of 1 to 6 rpm and 10 to 20% respectively. The measured contact heat transfer coefficients for all disperse systems were compared with four model approaches from the literature in terms of R2 values. Good agreement between the experimental measurements and the two model approaches were achieved. en
dc.format.extent 7 pages en
dc.format.medium PDF en
dc.language.iso en en
dc.publisher HEFAT en
dc.rights University of Pretoria en
dc.subject Heat transfer en
dc.subject Rotary drums en
dc.subject Solid bed dispersity en
dc.title The effect of solid bed dispersity on the contact heat transfer in rotary drums en
dc.type Presentation en

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