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ISSN Online: 2377-424X

ISBN Print: 0-89116-559-2

International Heat Transfer Conference 8
August, 17-22, 1986, San Francisco, USA

PARTICULATE FOULING DURING BOILING AND NON-BOILING HEAT TRANSFER

Get access (open in a dialog) DOI: 10.1615/IHTC8.3680
pages 2555-2560

Abstract

Heat transfer fouling of 2 μm alumina particles suspended in heptane was investigated experimentally with an internally heated rod in an annulus and a coiled wire mounted in crossflow. Flow velocity, bulk temperature, heat flux, system pressure and particle concentration were varied over a wide range. The operating conditions included both laminar and turbulent flow with boiling and non-boiling heat transfer.
The asymptotic fouling resistance, found for most runs, increased with increasing particle concentration and decreasing bulk temperature. It showed maxima at certain values of the flow rate for fixed values of the heat flux and at certain values of the heat flux for fixed values of the flow rate. If the initial surface temperature was kept constant the asymptotic fouling resistance decreased with increasing flow rate.