Quick Answer
Calculate BIM MEP Duct Sizing Efficiency Optimizer — Pressure Drop Calculation
Calculator
Result Interpretation
BIM MEP Duct Sizing Efficiency Optimizer — Pressure Drop Calculation Calculator computes Pressure drop in Pa using the defined engineering formula and the input values provided.
Worked Example
Verified calculation
Given:
- Duct length = 15
- Darcy friction factor = 0.018
- Hydraulic diameter = 0.6
- Air velocity = 4.5
- Air density = 1.204
Expected Result:
- Pressure drop = 5.485725
Engineering Interpretation:
Under the given input conditions, the calculated result is: Pressure drop = 5.485725 Pa.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.
Formula / Method
pressure drop = (darcy friction factor * duct length / hydraulic diameter) * (air density * air velocity * air velocity / 2)Formula family: formula_bim_bim_mep_duct_sizing_efficiency_optimizer
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| f | Darcy friction factor | INPUT | Darcy friction factor |
| L | Duct length | INPUT | Duct length |
| D_h | Hydraulic diameter | INPUT | Hydraulic diameter |
| V_air | Air velocity | INPUT | Air velocity |
| rho_air | Air density | INPUT | Air density |
| pressure_drop | Pressure drop | OUTPUT | Pressure drop |
Calculation Steps
- Enter the darcy friction factor in dimensionless.
- Enter the duct length in m.
- Enter the hydraulic diameter in m.
- Enter the air velocity in m/s.
- Enter the air density in kg/m^3.
- Step 1: Compute pressure drop.
- Read the pressure drop (Pa) from the results.
Engineering Summary
Calculate BIM MEP Duct Sizing Efficiency Optimizer — Pressure Drop Calculation
Frequently Asked Questions
What does this calculator calculate?
The BIM MEP Duct Sizing Efficiency Optimizer Pressure Drop Calculation Calculator estimates Pressure drop based on the input parameters you provide
Why is darcy friction factor important in this calculation?
darcy friction factor is directly proportional to pressure drop. When you enter darcy friction factor in dimensionless, the calculator uses it in the engineering formula to compute the output
How should I interpret the result pressure drop?
The calculator outputs pressure drop in Pa. For higher pressures, divide by 1000 to express in kPa, or by 101325 for atmospheres. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Darcy friction factor (dimensionless), Duct length (m), Hydraulic diameter (m), Air velocity (m/s), Air density (kg/m^3). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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