1. What is the Water Well Pump Flow Rate Equation?

The flow rate equation calculates the volumetric flow rate of water through a pump based on the pump's physical characteristics and operating conditions. It's essential for designing and evaluating water well pump systems.

2. How Does the Calculator Work?

The calculator uses the flow rate equation:

Where:

• \( Q \) — Flow rate (m³/s)
• \( D \) — Pump diameter (m)
• \( n \) — Rotational speed (rev/s)
• \( H \) — Head (m)
• \( g \) — Acceleration due to gravity (9.81 m/s²)

Explanation: The equation relates the pump's physical dimensions and operating speed to the volume of water it can move per second, accounting for the gravitational effects on the water column.

3. Importance of Flow Rate Calculation

Details: Accurate flow rate calculation is crucial for proper pump selection, system design, and ensuring adequate water supply for residential, agricultural, or industrial needs.

4. Using the Calculator

Tips: Enter pump diameter in meters, rotational speed in revolutions per second, head in meters, and gravity (default is 9.81 m/s²). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is head in pump calculations?
A: Head refers to the height of the water column that the pump must overcome, including both vertical lift and friction losses in the system.

Q2: How do I convert flow rate to other units?
A: Common conversions: 1 m³/s = 1000 L/s = 15850.3 gallons per minute (GPM) = 3600 m³/hour.

Q3: What affects pump flow rate?
A: Flow rate depends on pump size, speed, system head, impeller design, and fluid properties like viscosity and density.

Q4: How does diameter affect flow rate?
A: Flow rate increases with the square of the diameter - doubling the diameter quadruples the potential flow rate.

Q5: What's typical flow rate for residential wells?
A: Residential systems typically range from 0.0005 to 0.005 m³/s (0.5-5 L/s or 8-80 GPM), depending on household needs.