SciELO - Scientific Electronic Library Online

vol.21 issue1The effect of some processing conditions on the characteristics of biodegradable microspheres obtained by an emulsion solvent evaporation processThe influence of structural parameters on the permeability of ceramic foams author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Brazilian Journal of Chemical Engineering

Print version ISSN 0104-6632On-line version ISSN 1678-4383


THOMEO, J. C.  and  GRACE, J. R.. Heat transfer in packed beds: experimental evaluation of one-phase water flow. Braz. J. Chem. Eng. [online]. 2004, vol.21, n.1, pp.13-22. ISSN 0104-6632.

Experimental heat transfer studies were carried out in 50.8 mm diameter packed beds of glass beads percolated by water and heated from the wall. The tube-to-particle diameter ratio (D/dp) ranged from 1.72 to 13.7 and the water flow rate from 1.1 to 9.9 l/min. Bed heights ranged from 100 mm to 700 mm. The radial temperature was measured above the bed surface by five aligned sheathed thermocouples. Variations in angular temperature were observed, independent of both radial position and particle diameter. Results of repeated tests with the same packing and with repacking did not differ statistically. The radial temperature profile at the bed entrance, measured by a ring-shaped sensor, was uniform except very close to the tube wall.

Keywords : heat transfer; one-phase water flow; radial temperature profile.

        · text in English     · English ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License