1. What is Water Pump Power Consumption?

The power consumption of a water pump is the amount of energy required to move a specific volume of water against a certain head (height) at a given efficiency. It's a crucial parameter for pump selection and energy cost estimation.

2. How Does the Calculator Work?

The calculator uses the hydraulic power formula:

Where:

• \( P \) — Power (W)
• \( \rho \) — Density of fluid (kg/m³, 1000 for water)
• \( g \) — Gravitational acceleration (9.81 m/s²)
• \( Q \) — Flow rate (m³/s)
• \( H \) — Total head (m)
• \( \eta \) — Pump efficiency (0-1)

Explanation: The formula calculates the theoretical power needed to move the fluid, then divides by pump efficiency to get actual power consumption.

3. Importance of Power Calculation

Details: Accurate power calculation helps in selecting properly sized pumps, estimating energy costs, and designing efficient water systems.

4. Using the Calculator

Tips: Enter fluid density (1000 kg/m³ for water), flow rate in m³/s, total head in meters, and pump efficiency (typically 0.7-0.9 for centrifugal pumps).

5. Frequently Asked Questions (FAQ)

Q1: What's a typical pump efficiency value?
A: Centrifugal pumps typically have 70-90% efficiency, while positive displacement pumps can reach 90% or more.

Q2: How do I convert flow rate from L/s to m³/s?
A: Divide L/s by 1000 (1 m³/s = 1000 L/s).

Q3: What affects pump efficiency?
A: Pump type, size, operating point relative to best efficiency point (BEP), wear, and system design.

Q4: Why is density important?
A: Power requirement increases with fluid density. Water at 1000 kg/m³ is the reference, but other fluids require adjustment.

Q5: How does head affect power consumption?
A: Power is directly proportional to head - doubling the head doubles the power requirement.