1. What is a 1 HP Submersible Pump Flow Rate Calculator?

Definition: This calculator estimates the flow rate (in gallons per minute) of a 1 horsepower submersible water pump based on pump efficiency and total head.

Purpose: It helps engineers, plumbers, and irrigation specialists determine the expected water flow from a standard 1 HP submersible pump.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Flow rate (gallons per minute)
• \( \eta \) — Pump efficiency (0 to 1, typically 0.7-0.9)
• \( H \) — Total head (feet)
• 3960 — Conversion constant (foot-pounds per minute per horsepower)
• 8.34 — Weight of one gallon of water (pounds)

Explanation: The formula converts the pump's power into water flow rate considering the energy required to lift water against gravity.

3. Importance of Flow Rate Calculation

Details: Proper flow rate estimation ensures adequate water supply, proper system design, and efficient pump selection for wells, irrigation, and water systems.

4. Using the Calculator

Tips: Enter the pump efficiency (default 0.85 for typical pumps) and total head in feet. Efficiency must be between 0 and 1.

5. Frequently Asked Questions (FAQ)

Q1: What is pump efficiency?
A: It's the ratio of hydraulic power delivered to the water to the mechanical power input (typically 70-90% for good pumps).

Q2: How do I determine total head?
A: Total head = vertical lift + friction losses in pipes. Measure from water level to discharge point plus account for pipe friction.

Q3: Why does flow rate decrease with higher head?
A: The pump must work harder to lift water higher, leaving less energy available to create flow.

Q4: What's a typical efficiency for submersible pumps?
A: Good quality pumps range from 0.75 to 0.90. Older or worn pumps may be lower.

Q5: Does this work for other pump sizes?
A: No, this is specifically for 1 HP pumps. For other sizes, the formula would need adjustment.