Ride the Storm: Navigating Through Unstable Periods / Katerina Rudko (Belka G...
Duct Air Quantity Calculations
1. Calculate Equivalent Square and Rectangular Areas for Any Round Ducting ….
Round duct
Diameter(mm): 300
Cross-sectional area (mm2
): 70672.5
Dimensions of the Equivalent Square Duct Channel
266 (mm) x 266 (mm)
Dimensions of the Equivalent Rectangular Channel (experiment with length of one side)
Chosen length(mm): 200
Other length(mm): 353
Standard Diameters and Volumetric Flow Rates at Chosen Air Speeds ….
Dia CSA(mm2) CSA (m2) Airflow at 4ms-1, (m3/s) l/s m3/hr
100 7853 0.007853 0.031410 31.41 113.076
125 12270 0.012270 0.049078 49.07813 176.68125
150 17668 0.017668 0.070673 70.6725 254.421
200 31410 0.031410 0.125640 125.64 452.304
Convert Volumetric air speeds ….
Amount of air in m3/hr 450
Equivalent in l/s 125
Equivalent in m3/s 0.125
Linear speed of air (m/s) 1.768721922