Heat transport through the active layer of the moving bed in rotary drums

Loading...
Thumbnail Image

Date

Authors

Nafsun, A.I.
Herz, F.
Specht, E.
Komossa, H.
Wirtz, S.
Scherer, V.

Journal Title

Journal ISSN

Volume Title

Publisher

HEFAT

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.

Keywords

Heat transport, Rotary drums

Sustainable Development Goals

Citation