Hose Pressure Loss Calculator

Pressure Loss Formula:

\[ \Delta P = f \times \left( \frac{L}{D} \right) \times \left( \frac{\rho \times V^2}{2} \right) \]

Friction Factor (f):

Hose Length (L):

Hose Diameter (D):

Fluid Density (ρ):

kg/m³

Flow Velocity (V):

m/s

Pressure Drop (ΔP):

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1. What is a Hose Pressure Loss Calculator?

Definition: This calculator estimates the pressure drop in a hose system based on fluid dynamics principles.

Purpose: It helps engineers and technicians determine the pressure loss in fluid transport systems to ensure proper system design and operation.

2. How Does the Calculator Work?

The calculator uses the Darcy-Weisbach equation:

\[ \Delta P = f \times \left( \frac{L}{D} \right) \times \left( \frac{\rho \times V^2}{2} \right) \]

Where:

\( \Delta P \) — Pressure drop (Pascals)
\( f \) — Friction factor (dimensionless)
\( L \) — Hose length (meters)
\( D \) — Hose diameter (meters)
\( \rho \) — Fluid density (kg/m³)
\( V \) — Flow velocity (m/s)

Explanation: The equation calculates the pressure loss due to friction between the fluid and the hose walls.

3. Importance of Pressure Loss Calculation

Details: Accurate pressure loss estimation ensures proper pump selection, system efficiency, and prevents flow rate issues in fluid systems.

4. Using the Calculator

Tips: Enter the friction factor (default 0.02 for smooth hoses), hose dimensions, fluid properties, and flow velocity. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical friction factor for hoses?
A: For smooth rubber hoses, it's typically 0.02-0.03. For rough hoses or turbulent flow, it may be higher.

Q2: How do I find flow velocity?
A: Velocity = Flow rate (m³/s) / Cross-sectional area (m²) of the hose.

Q3: Does this account for fittings and bends?
A: No, this calculates straight hose loss only. Additional losses from fittings require separate calculations.

Q4: What's the density of water?
A: Pure water at 4°C is 1000 kg/m³. The default value is set for water.

Q5: How do I convert Pascals to other units?
A: 1 bar = 100,000 Pa, 1 psi ≈ 6895 Pa. Multiply the result by the appropriate conversion factor.