Abstract:
The heat transfer at the freeboard surface of the solid bed
was experimentally investigated in a batch rotary drum with a
diameter of 0.6 m and a length of 0.45 m. The change of
temperature at the surface and inside the bed was measured with
Type-K thermocouples and an infrared camera. The
thermocouples are specifically arranged at different radial
distances from the inner wall. Experiments have been done with
a variation of the operational conditions rotational speed from 1
to 6 rpm and filling degree from 5% to 15%. As test materials
glass beads, quartz sand, steel spheres and expanded clay were
used, whereas the impact of particle size and thermo-physical
properties on the heat transport through free bed surface was
analyzed. A characteristic effective thermal conductivity was
defined for the active layer to represent the heat transport from
the free bed surface.
Description:
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.
