Duct Pressure Loss Calculator
The Duct Pressure Loss Calculator is an essential tool used to estimate the pressure drop or loss that occurs within a duct system due to various factors such as friction, length, diameter, velocity of airflow, and gravity. Its primary function is to calculate the pressure loss (ΔP) occurring in the duct, offering insights into the system’s efficiency.
Formula of Duct Pressure Loss Calculator
The formula used by the Duct Pressure Loss Calculator is:
Pressure Loss (ΔP) = (4 * f * (L / D) * (V^2)) / (2 * g)
Where:
- ΔP represents the pressure loss (in pascals or pounds per square inch)
- f denotes the Darcy friction factor, influenced by the Reynolds number and duct roughness
- L signifies the length of the duct (in meters or feet)
- D stands for the diameter of the duct (in meters or feet)
- V represents the velocity of air flow (in meters per second or feet per second)
- g represents the acceleration due to gravity (approximately 9.81 m/s² or 32.2 ft/s²)
General Terms and Conversions
| General Terms | Conversion Factors |
|---|---|
| Pressure loss (ΔP) | 1 Pa = 0.0001450377377 psi |
| Darcy friction factor (f) | – |
| Duct length (L) | 1 meter = 3.28084 feet |
| Duct diameter (D) | 1 meter = 3.28084 feet |
| Air flow velocity (V) | 1 m/s = 3.28084 ft/s |
| Acceleration due to gravity (g) | 1 m/s² = 3.28084 ft/s² |
Example of Duct Pressure Loss Calculator
Imagine a scenario where a ventilation system requires understanding the pressure loss to maintain adequate airflow. By inputting the duct’s length, diameter, airflow velocity, and other pertinent details into the calculator, one can swiftly estimate the pressure drop. This information aids in optimizing the system for better performance.
Most Common FAQs
A: The Darcy friction factor relies on various factors, including the Reynolds number and the roughness of the duct. It can be calculated using empirical correlations or obtained from reference charts based on specific conditions.
A: Pressure loss estimation is crucial as it influences the efficiency of duct systems, affecting airflow distribution, energy consumption, and system performance.