1. What is Pump Power Calculation?

Pump power calculation determines the power required to drive a pump based on flow rate, head, specific gravity, and efficiency. It helps in selecting appropriate pump motors and ensuring efficient system operation.

2. How Does the Calculator Work?

The calculator uses the pump power formula:

Where:

• \( P \) — Pump power (hp)
• \( Flow \) — Flow rate (gpm)
• \( Head \) — Total dynamic head (ft)
• \( SG \) — Specific gravity (unitless)
• \( Eff \) — Pump efficiency (decimal)

Explanation: The formula calculates the hydraulic power required to move fluid through the system, accounting for the fluid properties and pump efficiency.

3. Importance of Pump Power Calculation

Details: Accurate pump power calculation is essential for proper pump selection, energy efficiency optimization, and preventing motor overload in pumping systems.

4. Using the Calculator

Tips: Enter flow in gpm, head in feet, specific gravity (1.0 for water), and efficiency as a decimal (e.g., 0.85 for 85%). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is specific gravity?
A: Specific gravity is the ratio of fluid density to water density at 4°C. Water has SG = 1.0.

Q2: Why is 3960 used in the formula?
A: 3960 is a conversion factor that combines unit conversions to give power in horsepower when using gpm and feet.

Q3: What is typical pump efficiency?
A: Pump efficiency typically ranges from 50% to 85%, depending on pump type, size, and operating conditions.

Q4: Can this formula be used for all pump types?
A: This formula is generally applicable for centrifugal pumps. Positive displacement pumps may require different calculations.

Q5: How does head affect power requirements?
A: Higher head requires more power, as the pump must work against greater pressure to move the fluid.