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Prediction of Reentering Ratio of Individual Cooling Towers Scattered on a Building Roof  

Lee, Tae-Gu (Department of Mechanical Engineering, Graduate School of Hanyang University)
Moon, Sun-Ae (Department of Mechanical Engineering, Graduate School of Hanyang University)
Yoo, Ho-Seon (Department of Mechanical Engineering, Soongsil University)
Lee, Jae-Heon (Department of Mechanical Engineering, Hanyang University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.18, no.11, 2006 , pp. 923-932 More about this Journal
Abstract
In this paper, reentering ratio and cooling capacity of individual cooling towers arrayed on a building roof were studied by a numerical method. The number of 16 cooling towers were divided into 4 banks. It was considered the summer prevailing wind characteristics as west wind and south wind of 5 m/s. It was also considered the roofwall types as the curtainwall and the louverwall that had the outdoor air intake louver in the curtainwall. In this case, the louver was suggested as the solution that could prevent reentering phenomenon due to recirculation and interference of the discharge air. In the case of the curtainwall, the averaged reentering ratio are predicted 13.3% and 24.4% for the west and south wind of 5 m/s, respectively. In the case of the louverwall, the averaged reentering ratio are predicted 2.5% and 9.7% for the west and south wind of 5 m/s, respectively. Therefore, the louverwall is a appropriate solution for reducing the reentering phenomenon.
Keywords
Cooling tower; Recirculation; Interference; Reentering rate;
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