The Air Blower Capacity Calculator is a specialized tool designed to determine the capacity of air blowers, which is critical for engineers, HVAC professionals, and facility managers. This calculator helps to ensure that air blower systems are adequately sized to meet the ventilation needs of a space, optimizing energy usage and ensuring effective air circulation. The capacity of an air blower is typically measured in cubic feet per minute (CFM), which represents the volume of air the blower can move per minute.
Formula of Air Blower Capacity Calculator
To calculate the capacity of an air blower, you can use the following formula:
Air Blower Capacity (CFM) = Air Velocity (feet per minute) × Cross-sectional Area of Duct (square feet)
Here are the steps in detail:
- Measure the Air Velocity in feet per minute (fpm): This is the speed at which air is moving through the duct.
- Calculate the Cross-sectional Area of the Duct in square feet (sq ft):
- For a rectangular duct, the area can be calculate as:
- Cross-sectional Area = Width of Duct (feet) × Height of Duct (feet)
- For a circular duct, the area can be calculate as:
- Cross-sectional Area = π × (Radius of Duct (feet))^2
- Note: π (pi) is approximately 3.14159.
- For a rectangular duct, the area can be calculate as:
- Multiply the Air Velocity by the Cross-sectional Area to get the Air Blower Capacity in cubic feet per minute (CFM):
- Air Blower Capacity (CFM) = Air Velocity (feet per minute) × Cross-sectional Area of Duct (square feet)
General Terms Table
| Term | Definition |
|---|---|
| Air Blower Capacity (CFM) | The volume of air moved by the blower per minute. |
| Air Velocity (fpm) | Speed at which air moves through a duct. |
| Cross-sectional Area (sq ft) | The area of the duct through which air is moving. |
| Rectangular Duct | A duct with a rectangular cross-section. |
| Circular Duct | A duct with a circular cross-section. |
Example of Air Blower Capacity Calculator
Consider a scenario where an HVAC system includes a circular duct with a radius of 2 feet, and the air velocity is measure at 500 feet per minute.
Using the formula:
- Cross-sectional Area = π × (2 ft)^2 ≈ 12.57 sq ft
- Air Blower Capacity (CFM) = 500 fpm × 12.57 sq ft = 6285 CFM
This calculation shows that the air blower has a capacity of approximately 6285 cubic feet per minute.
Most Common FAQs
Factors include the dimensions of the duct (area and shape), the velocity of the air through the duct, and any restrictions or enhancements in the duct system.
Properly calculated air blower capacity ensures that the system is not overwork, leading to lower energy consumption and more efficient operation.
Yes, this calculator can be apply to various types of air blower systems as long as the necessary measurements are accurately take.