Effect of inlet flow distortions on fan performance in forced draught air-cooled heat exchangers |
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Affiliation: | 1. School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China;2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China;1. Johns Hopkins University School of Nursing, Baltimore, MD, USA;2. University of Wollongong, Wollongong, NSW, Australia;3. Johns Hopkins University School of Medicine, Baltimore, MD, USA;4. Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, USA;5. Consortium of Universities for Global Health, Washington, DC, VA, USA;1. LTDS, Ecole d’ingénieurs de Saint-Etienne (ENISE), Saint-Etienne, France;2. CETHIL, Institut National des Sciences Appliquées, Lyon, France;1. von Karman Institute, Chaussée de Waterloo 72, B-1640 Rhode-St-Genèse, Belgium;2. SCK•CEN, Boeretang 200, 2400 Mol, Belgium;1. Metallurgy and Materials Group, Indira Gandhi Center for Atomic Research, Kalpakkam 603102, Tamil Nadu, India;2. IGCAR, HBNI, Kalpakkam 603102, Tamil Nadu, India |
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Abstract: | Forced flow air-cooled heat exchangers (ACHEs) as found in the petro-chemical, process and power industries use fans arranged in single or multiple fan rows to force air over finned tube bundles. Any flow disturvances or distortions experienced at the inlets of these fans tend to reduce the effectiveness of the ACHE.The reduction of the air flow rate through ACHE models having different numbers of fan rows is investigated experimentally. By varying the distance between the fan platform and the ground level, significant changes in air flow rate are observed and the results are correlated by an empirical relation which can be applied to the design of ACHEs. Fans along the edge of an ACHE are most affected by the distorted inlet air flow pattern. Furthermore, the influence of a walkway along the edge of the fan platform on the air flow rate through an ACHE is also investigated. |
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