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Experimental study and mathematical modelling of heat transfer processes in heat accumulating media

Experimental study and mathematical modelling of heat transfer processes in heat accumulating media Experimental results on reversing non-stationary heat transfer are presented for filtration of an air flow through an immobile heat accumulating medium consisting of lead (D = 2.0, 3.5, and 4.5 mm) and glass (D = 3.2 mm) balls. The studied device imitated the cyclic modes of heat regeneration in the ventilation system for domestic and office rooms. Dependency between the time of flow switching and Re number was measured. The mathematical model describing heat transfer between a gas flow and an immobile layer of balls was developed. Good correspondence between the experimental data and calculation results is observed for high Reynolds numbers. For low Re numbers the effect of heat losses is considerable, and experimental time of flow switching is shorter than the calculation one. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Thermophysics and Aeromechanics Springer Journals

Experimental study and mathematical modelling of heat transfer processes in heat accumulating media

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Publisher
Springer Journals
Copyright
Copyright © I.V. Mezentsev, N.V. Vernikovskaya, Yu.I. Aristov, and V.A. Mukhin 2006
ISSN
0869-8643
eISSN
1531-8699
DOI
10.1134/s0869864306030103
Publisher site
See Article on Publisher Site

Abstract

Experimental results on reversing non-stationary heat transfer are presented for filtration of an air flow through an immobile heat accumulating medium consisting of lead (D = 2.0, 3.5, and 4.5 mm) and glass (D = 3.2 mm) balls. The studied device imitated the cyclic modes of heat regeneration in the ventilation system for domestic and office rooms. Dependency between the time of flow switching and Re number was measured. The mathematical model describing heat transfer between a gas flow and an immobile layer of balls was developed. Good correspondence between the experimental data and calculation results is observed for high Reynolds numbers. For low Re numbers the effect of heat losses is considerable, and experimental time of flow switching is shorter than the calculation one.

Journal

Thermophysics and AeromechanicsSpringer Journals

Published: Sep 1, 2006

Keywords: Heat Transfer; Heat Transfer Coefficient; Half Cycle; Pressure Swing Adsorption; Heat Regeneration

References