Experimental study of heat transfer coefficient and pressure drop of cellulose corrugated media

He, Suoying, Guan, Zhiqiang, Gurgenci, Hal, Hooman, Kamel and Alkhedhair, Abdullah M. (2014). Experimental study of heat transfer coefficient and pressure drop of cellulose corrugated media. In: Harun Chowdhury and Firoz Alam, Proceedings of the 19th Australasian Fluid Mechanics Conference. 19th Australasian Fluid Mechanics Conference, Melbourne, VIC, Australia, (176.1-176.4). 8-11 December 2014.

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Author He, Suoying
Guan, Zhiqiang
Gurgenci, Hal
Hooman, Kamel
Alkhedhair, Abdullah M.
Title of paper Experimental study of heat transfer coefficient and pressure drop of cellulose corrugated media
Conference name 19th Australasian Fluid Mechanics Conference
Conference location Melbourne, VIC, Australia
Conference dates 8-11 December 2014
Proceedings title Proceedings of the 19th Australasian Fluid Mechanics Conference
Journal name Proceedings of the 19th Australasian Fluid Mechanics Conference, AFMC 2014
Place of Publication Melbourne, VIC, Australia
Publisher RMIT University
Publication Year 2014
Sub-type Fully published paper
Open Access Status
ISBN 9780646596952
Editor Harun Chowdhury
Firoz Alam
Start page 176.1
End page 176.4
Total pages 4
Collection year 2015
Language eng
Abstract/Summary Wetted-medium evaporative cooling is presently applied in many fields, where the wetted media are to provide large water-air contact surface area and more contact time. The present authors are trying to pre-cool the entering air of Natural Draft Dry Cooling Towers (NDDCTs) for their performance improvement during hot seasons. However, the medium introduces extra pressure drop which reduces the air flow of a NDDCT, and as a result, impairs the tower performance. There is a trade-off between the cooling potential and pressure drop. In this study, a type of wetted medium, which has corrugated structure, is selected as part of a broader investigation on pre-cooling the entering air of NDDCTs. An open-circuit low-speed wind tunnel was used to study the performance of evaporative cooling with cellulose corrugated medium. The heat transfer coefficient, cooling efficiency and pressure drop across the medium with various thicknesses were experimentally studied in the wind tunnel. The test data were non-dimensionalized and curve fitted to yield a set of correlations. The effects of air and water flows on cooling efficiency and pressure drop were investigated. It was found that greater pressure drop occurs at larger medium thickness and higher air velocity. The pressure drop increases with the increase in water flow rate, however, the largest impacts on pressure drop are due to the changes in air flow and medium thickness. Higher cooling efficiency is associated with thicker medium at lower air velocity. The effect of water flow on cooling efficiency is negligible as long as the water is properly distributed and the media are fully wetted.
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Paper 176

 
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Created: Mon, 02 Feb 2015, 08:40:45 EST by Katie Gollschewski on behalf of School of Mechanical and Mining Engineering