MEBS6008 Environmental Services II

Home | What's New | Schedule | Assignments

Fans and Pumps II

1.  Fan Design

• Fan types
• Fan arrangements
• Centrifugal and axial fans

2.  Fan Performance

• Fan performance curves
• Fan laws
• Energy losses
• Typical curves

3.  Fan-duct Systems

• Duct and presure characteristics
• System effects
• Fan modulation methods
• Fan surge and fan stall
• Fan selection

4.  Duct Construction

• Duct systems and materials
• Specification
• Frictional losses and dynamic losses

5.  Air Duct Design

• Optimal air duct design
• Design considerations and procedure
• Duct sizing methods

[Download PowerPoint file]
[Types of fans (from ASHRAE Handbook 2000 HVAC Systems and Equipment)]

---

References:

• 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]
• 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]
• SMACNA, 1990. HVAC Systems Duct Design, 3rd ed., Sheet Metal and Air Conditioning Contractors' National Association, Chantilly, VA. [697 H98 S5d]
• 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]

Web Links:

• Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) http://www.smacna.org/

---

| Created: Nov 2004 | Update: 19 Jan 2008 | By: cmhui@hku.hk |