Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

EFFECT OF MIXED PARTICLE SIZES ON LOCAL HEAT TRANSFER COEFFICIENTS AROUND A HORIZONTAL TUBE IN FLUIDIZED BEDS

Get access (open in a dialog) DOI: 10.1615/IHTC7.70
pages 39-44

Abstrakt

The local and circumferentially-averaged heat transfer coefficients for single horizontal tubes was measured in air fluidized beds of mixtures of qlass beads. Data were obtained for uniformly sized 300 μm and 850 μm (mean diameter) glass beads and for mixtures of the above two sizes of particles. The amount of the smaller-size particles was varied in steps of 5, 15, 25, 50 weight percent. Measurements were obtained up to 3.5 m/s superficial gas velocity. Heat transfer coefficients were found to increase with increasing fraction of the smaller size particles, for a given air flow rate. Experimental results were compared with some of the existing heat transfer correlations using a weight-mean average particle diameter.