Pressure Loss Formula:
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Definition: This calculator estimates the pressure loss (ΔP) that occurs when fluid flows through pipe fittings using the resistance coefficient, fluid density, and flow velocity.
Purpose: It helps engineers and technicians determine the energy loss in piping systems to ensure proper system design and pump selection.
The calculator uses the formula:
Where:
Explanation: The pressure loss increases with the square of velocity and is directly proportional to both the resistance coefficient and fluid density.
Details: Accurate pressure loss calculations are critical for proper pump sizing, energy efficiency, and ensuring system performance meets design requirements.
Tips: Enter the resistance coefficient (K) for your fitting, fluid density (default 1000 kg/m³ for water), and flow velocity. All values must be > 0.
Q1: Where can I find K values for different fittings?
A: K values are typically found in engineering handbooks or from fitting manufacturers. Common values range from 0.2 for long-radius elbows to 1.5 for tees.
Q2: What's a typical density for water?
A: Water at 20°C has a density of about 998 kg/m³, often rounded to 1000 kg/m³ for calculations.
Q3: How does velocity affect pressure loss?
A: Pressure loss increases with the square of velocity - doubling velocity quadruples the pressure loss.
Q4: Can this be used for gases?
A: Yes, but ensure you use the correct density for your gas at operating conditions.
Q5: Does this include friction loss in straight pipe?
A: No, this only calculates losses through fittings. Use the Darcy-Weisbach equation for straight pipe losses.