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By multiplying air velocity by the cross section area of a duct, you can determine the air volume flowing past a point in the duct per unit of time. Volume flow is usually measured in Cubic Feet per Minute (CFM). Concept of Air Velocity can be used in air conditioning, heating and ventilating work.
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Calculation Formula. The air flow is calculated using the formula: \[ \text{Air Flow} (m^3/s) = \text{Velocity} (m/s) \times \text{Cross-Sectional Area} (m^2) \] Example Calculation. Consider a ventilation duct with: Velocity: 3 m/s; Cross-Sectional Area: 0.5 m² \[ \text{Air Flow} = 3 \text{ m/s} \times 0.5 \text{ m}^2 = 1.5 \text{ m}^3/\text ...
CUI Devices' air flow conversion calculator can be used to convert between common units for volume air flow and air velocity flowing past a point in a specified area of duct. To use the calculator, enter your air velocity or volume air flow and duct area/type, select your units, click calculate air flow, and your converted velocity and volume ...
6 dni temu · Air volume is calculated using the formula: \ [ \text {Air Volume (ft³)} = \text {Volumetric Air Flow (CFM)} \times \text {Total Time (Minutes)} \] Example Calculation. For instance, if an HVAC system has a volumetric air flow of 500 CFM and it operates for 60 minutes:
The calculator utilizes a straightforward formula to calculate the air flow rate: Air Flow Rate = Area * Velocity The formula multiplies the area and velocity values to determine the volume of air flowing through the space per unit of time.
An air velocity calculator will express this distance in LFM (ft/min, linear feet per minute). By using an air velocity through duct calculator, you're multiplying the air velocity by the area of a duct. With this, you'll find the air volume that flows past the duct in terms of units per time.
Air Thermal calculations: sp.ht = 0.24. 13.3 cu.ft. = 1 lb. 0.075 lbs. = 1 cu.ft. .075 lbs. x 60 min. = 4.5 lbs per hour. 4.5 x 0.24 = 1.08. BTUH = M × sp . ht . × ∆ T. M = Mass Flow Rate in Lbs. per Hour. sp.ht. = Specific Heat in BTU/Lb. per Degree. F.
