Heat Exchange in Fluid-Dense Particle Moving Beds

[+] Author and Article Information
L. E. Sissom

Department of Mechanical Engineering, Tennessee Technological University, Cookeville, Tenn.

T. W. Jackson

Georgia Institute of Technology, Atlanta, Ga.

J. Heat Transfer 89(1), 1-6 (Feb 01, 1967) (6 pages) doi:10.1115/1.3614316 History: Received June 25, 1965; Revised January 14, 1966; Online August 25, 2011


The characteristics of nonisothermal two-phase steady flow in a vertical pipe of constant area were investigated experimentally. Temperature and pressure distributions were determined, and the void fraction was measured under flowing conditions. Aluminum granules of 0.027 in. mean diameter flowed with gravity while heated air was forced countercurrently to the solids flow. Reynolds numbers, based on the superficial air velocity, from 10 to 50 were investigated. The solids flow rate was varied from 472 to 18,900 lbm/hr-sq ft. Utilizing the regeneration principle, the effective length of a fluid-to-particle heat exchanger was determined. Its small value and the large surface area to volume ratio (2980 sq ft/cu ft) indicate that such a heat exchanger would be very compact.

Copyright © 1967 by ASME
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