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Evaporative cooling of air in impinging streams
Author(s) -
Yao B.,
Berman Y.,
Tamir A.
Publication year - 1995
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690410707
Subject(s) - streams , evaporative cooler , coalescence (physics) , mechanics , evaporation , momentum (technical analysis) , air stream , heat transfer , materials science , thermodynamics , environmental science , physics , environmental engineering , computer network , finance , astrobiology , computer science , economics
An experience study was conducted on evaporative cooling of air in an impinging‐stream reactor, in which two droplets gas streams flow in opposite directions and meet in the impingement zone. The air was cooler by evaporation of water droplets. Volumetric heat‐transfer coefficients h v determined enabled us to evaluate the performance of the cooler. Maximum values of h v varied from 4 to 14 kW/m 3 K. The effectiveness of impinging streams was evaluated by placing a partition in the implingement zone, which prevented interaction between the streams. A numerical modeling of the droplets' behavior in an impingin‐stream reactor was also performed on the basis of heat and momentum equations. Effects of initial droplets' size and velosity as well as atomization and coalescence on the enhancement by impinging streans have been investigated. Correlation equations are also discussed. The experimental and numerical resluts helped understant the fundamentals mechanisms of an impinging‐stream reactor with a gs‐droplet suspension and furthet verify the effectiveness of the method of impinging streams.