Experimental study of film media used for evaporative pre-cooling of air

He, Suoying, Guan, Zhiqiang, Gurgenci, Hal, Hooman, Kamel, Lu, Yuanshen and Alkhedhair, Abdullah M. (2014) Experimental study of film media used for evaporative pre-cooling of air. Energy Conversion and Management, 87 874-884. doi:10.1016/j.enconman.2014.07.084


Author He, Suoying
Guan, Zhiqiang
Gurgenci, Hal
Hooman, Kamel
Lu, Yuanshen
Alkhedhair, Abdullah M.
Title Experimental study of film media used for evaporative pre-cooling of air
Journal name Energy Conversion and Management   Check publisher's open access policy
ISSN 0196-8904
1879-2227
Publication date 2014-01-01
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.enconman.2014.07.084
Volume 87
Start page 874
End page 884
Total pages 11
Place of publication Camden, London, United Kingdom
Publisher Elsevier
Collection year 2015
Language eng
Abstract An open-circuit low-speed wind tunnel was used to study the performance of evaporative cooling with cellulose and Polyvinyl Chloride (PVC) corrugated media. These two film media were selected as part of a broader investigation on pre-cooling the entering air of natural draft dry cooling towers. The heat and mass transfer and pressure drop across the two media with three thicknesses (i.e., 100, 200 and 300 mm) were experimentally studied in the wind tunnel. The test data were non-dimensionalized and curve fitted to yield a set of correlations. It was found that the pressure drop range of the cellulose media is 1.5-101.7 Pa while the pressure drops of the PVC media are much lower with the range of 0.9-49.2 Pa, depending on the medium thickness, air velocity and water flow rate. The cooling efficiencies of the cellulose media vary from 43% to 90% while the cooling efficiencies of the PVC media are 8% to 65%, depending on the medium thickness and air velocity. The water entrainment off the media was detected by water sensitive papers, and found that the cellulose media have negligible water entrainment under the studied conditions while care must be taken in the use of PVC media as water entrainment happens even at relatively low air velocities.
Keyword Cooling efficiency
Heat transfer coefficient
Pressure drop
Water evaporation
Wetted media
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2015 Collection
 
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