Journal of Applied Science and Engineering

Published by Tamkang University Press


Impact Factor



Pornthep Sittisak This email address is being protected from spambots. You need JavaScript enabled to view it.1,2, Benjapon Chalermsinsuwan3,4, Tawatchai Charinpanitkul5

1 Interdisciplinary Program of Environmental Science, Graduate School, Chulalongkorn University, Bangkok, Thailand
2Pro Jet Fan Company Limited, Bangkuay, Nonthaburi, Thailand
3Fuels Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
4Advanced Computational Fluid Dynamics Research Unit, Chulalongkorn University, Bangkok, Thailand
5Center of Excellence in Particle Technology, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand


Received: July 18, 2019
Accepted: January 6, 2020
Publication Date: June 1, 2020

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As novel ductless ventilation equipment, a jet fan could be employed in confined space, such as underground car park and tunnel. It can provide air flow with substantial velocity profile volume which is necessary for effective ventilation. Effect of tilt angle, gap distance and height of single jet fan and twin jet fans on velocity profile volume in enclosed space was experimentally examined with 2k factorial experimental analysis. It was found that tilt angle and height of the single jet fan could exert significant effect on velocity profile volume (p<0.05). Meanwhile, in the twin jet fan system, the gap distance and tilt angle could provide significant effect on the velocity profile volume (p<0.05). In comparison with 2 sets of the single fan system, application of the twin jet fan system could provide the 142% higher velocity profile volumes with the 50% lower energy consumption.

Keywords: jet fan, ductless ventilation, velocity profile volume, 2k factorial design



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