MEBS6008
Environmental Services II
1. Fan Design
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Fan types
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Fan arrangements
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Centrifugal and axial fans
2. Fan Performance
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Fan performance curves
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Fan laws
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Energy losses
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Typical curves
3. Fan-duct Systems
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Duct and presure characteristics
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System effects
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Fan modulation methods
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Fan surge and fan stall
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Fan selection
4. Duct Construction
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Duct systems and materials
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Specification and heat gain/loss
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Frictional losses and dynamic
losses
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Flow resistance
5. Air Duct Design
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Optimal air duct design
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Design considerations and procedure
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Duct sizing methods
[Download PowerPoint file (1 MB)]
[Types
of fans (from ASHRAE Handbook 2000 HVAC Systems and Equipment)]
References:
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ASHRAE, 2002. ASHRAE Duct
Fitting Loss Data Base, Version 2.2.5, American Society of Heating,
Refrigerating and Air-Conditioning Engineers, Inc., Atlanta, GA. [AV
697.93 A82]
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Race, G. L. and Mitchell, S.,
2003. A Practical Guide to HVAC Building Services Calculations,
Building Services Research and Information Association, Bracknell, Berkshire,
England, pp. 79-95. [697
R1 p][697
R1 p8]
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SMACNA, 1990. HVAC Systems
Duct Design, 3rd ed., Sheet Metal and Air Conditioning Contractors'
National Association, Chantilly, VA. [697
H98 S5d]
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Wang, S. K., 2001. Handbook
of Air Conditioning and Refrigeration, 2nd ed., Chps. 15 & 17,
McGraw-Hill, New York. [697.93
W24 h][* available in eBook]
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| Created: Nov 2004 | Update:
1 Mar 2005 | By: cmhui@hku.hk |