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Air Ducts Friction Loss Diagram
Major loss diagram air ducts - SI units
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Friction loss in standard air ducts are indicated in the diagram below.
- 1 m/s = 196.85 ft/min
- 1 m3/s = 3600 m3/h = 1000 dm3(liter)/s = 35.32 ft3/s = 2118.9 ft3/min = 13200 Imp.gal (UK)/min = 15852 gal (US)/min
- 1 Pa = 1 N/m2 = 1.4504x10-4 lb/in2 = 1x10-5 bar = 4.03x10-3 in water = 0.336x10-3 ft water = 0.1024 mm water = 0.295x10-3 in mercury = 7.55x10-3 mm mercury = 0.1024 kg/m2 = 0.993x10-5 atm
Example - Air Duct and Friction Loss
The friction loss in a 500 mm main duct in comfort system with air flow 1 m3/s can be estimated as indicated below to 0.05 Pa/m.
The air velocity in the duct is 5 m/s.
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Related Topics
- Ventilation - Systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more
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