Submersible Water Well Pump Calculator

Pump Flow Rate Equation:

\[ Q = \frac{\pi \times D^2 \times n \times H}{4 \times g} \]

Diameter (D):

meters

Speed (n):

rev/s

Head (H):

meters

Gravity (g):

m/s²

Flow Rate (Q):

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

The submersible water well pump flow rate equation calculates the volumetric flow rate of water being pumped from a well. It's essential for designing and selecting appropriate pumping systems for water supply.

2. How Does the Calculator Work?

The calculator uses the pump flow rate equation:

\[ Q = \frac{\pi \times D^2 \times n \times H}{4 \times g} \]

Where:

\( Q \) — Flow rate (m³/s)
\( D \) — Diameter of the pump impeller (m)
\( n \) — Rotational speed (rev/s)
\( H \) — Total dynamic head (m)
\( g \) — Acceleration due to gravity (9.81 m/s²)

Explanation: The equation relates the pump's physical characteristics and operating conditions to determine how much water it can move per unit time.

3. Importance of Flow Rate Calculation

Details: Accurate flow rate calculation is crucial for proper well design, ensuring adequate water supply, and selecting appropriately sized pumps for specific applications.

4. Using the Calculator

Tips: Enter the pump impeller diameter in meters, rotational speed in revolutions per second, total dynamic 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 total dynamic head (H)?
A: It's the total equivalent height that water needs to be pumped, accounting for both vertical lift and friction losses in the system.

Q2: How does impeller diameter affect flow rate?
A: Flow rate increases with the square of the impeller diameter, making it one of the most significant factors in pump performance.

Q3: What are typical flow rates for residential well pumps?
A: Residential systems typically range from 0.0005 to 0.002 m³/s (8-32 GPM), depending on household needs and well characteristics.

Q4: Why is gravity included in the equation?
A: Gravity affects the pump's ability to overcome the head pressure and move water vertically.

Q5: Can this calculator be used for other types of pumps?
A: This specific equation is most accurate for centrifugal submersible pumps. Other pump types may require different calculations.