Influence of Diffuser Jet Characteristics on Indoor Air Distribution under Actual Connecting Conditions
Publication: Journal of Architectural Engineering
Volume 9, Issue 4
Abstract
When air distribution in a ventilated room is designed, the outflow velocity from the air supply diffuser is usually treated as uniform. This is true when the duct connections are such that the air enters the diffuser as uniformly as possible with no abrupt changes in direction or velocity. In practical heating, ventilating, and air conditioning systems, space is often limited for duct installation, and a less than optimum connection may have to be used. This technical note presents a study of the influence of diffuser jet characteristics under actual connecting conditions on air distribution in an office room. Measurements and numerical simulation using both uniform and asymmetric diffuser jets as boundary conditions were performed. It was found that the asymmetric flow from an air supply diffuser may have a distinct effect on indoor air distribution.
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References
Chen, Q., and Xu, W.(1998). “A zero-equation turbulence model for indoor air flow simulation.” Energy Build., 28, 137–144.
Gosman, A. D., Nielsen, P. V., Restivo, A., and Whitelaw, J. H.(1980). “The flow properties in rooms with small ventilation openings.” Trans. ASME J. Fluids Eng., 102, 3216–323.
Huo, Y., Haghighat, H., Zhang, J. S., and Shaw, C. Y.(2000). “A systematic approach to describe the air terminal device in CFD simulation for room air distribution analysis.” Build. Environ., 35, 563–576.
Huo, Y., Zhang, J. S., Shaw, C. Y., and Haghighat, F. (1996). “A new method to describe the diffuser boundary conditions in CFD simulation.” Proc., Roomvent’96, 1–8.
Nielsen, P. V.(1992). “Description of supply openings in numerical models for room air distribution.” ASHRAE Trans., 98, 963–971.
Patankar, S. V. (1980). Numerical heat transfer and fluid flow, Hemisphere Publishing, New York.
Zhao, B., Li, X., and Yan, Q.(2003). “A simplified system for indoor airflow simulation.” Build. Environ., 38, 543–552.
Information & Authors
Information
Published In
Journal of Architectural Engineering
Volume 9 • Issue 4 • December 2003
Pages: 141 - 144
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Jul 22, 2002
Accepted: Jul 2, 2003
Published online: Nov 14, 2003
Published in print: Dec 2003
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