Journal
APPLIED THERMAL ENGINEERING
Volume 50, Issue 1, Pages 475-484Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2012.06.026
Keywords
Cooling tower; Wet-cooling; Crossflow; Counterflow; Anisotropic; Fill
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In cooling towers packed with trickle or splash fills, which have almost isotropic or anisotropic flow resistance, the air flow through the fill is oblique or in cross-counterflow to the water flow, particularly at the cooling tower inlet when the fill loss coefficient is small or when the fill hangs down into the air inlet region. This results that the fill Merkel number or transfer characteristic for cross-counterflow is between that of purely counter- and cross-flow fills. When using CFD to model natural draught wet-cooling tower performance for isotropic or anisotropic fill resistance, two- or three-dimensional models and fill characteristics are therefore required to determine overall fill performance. In this paper, the test facility, measurement techniques and methods of analysis used to determine fill performance characteristics in counter- and cross-flow configuration are presented and discussed. Results obtained for a specific fill are presented and discussed which can be used for the evaluation of cross-counterflow fill performance. (C) 2012 Elsevier Ltd. All rights reserved.
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