1. What is Pump Power Calculation?

The Pump Power Calculation in Imperial Units determines the power required by a pump to move a fluid, based on flow rate, specific gravity, head, and efficiency. It provides an essential metric for pump selection and energy consumption estimation.

2. How Does the Calculator Work?

The calculator uses the pump power formula:

Where:

• \( P \) — Pump power (hp)
• \( Q \) — Flow rate (gpm)
• \( SG \) — Specific gravity (dimensionless)
• \( h \) — Head (ft)
• \( \eta \) — Efficiency (%)

Explanation: The equation calculates the hydraulic horsepower required, accounting for the fluid properties and pump efficiency.

3. Importance of Pump Power Calculation

Details: Accurate pump power calculation is crucial for proper pump selection, energy efficiency assessment, and system design optimization in various industrial and commercial applications.

4. Using the Calculator

Tips: Enter flow rate in gpm, specific gravity (1.0 for water), head in feet, and efficiency as a percentage. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

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

Q2: How is pump efficiency determined?
A: Pump efficiency is typically provided by the manufacturer and represents the ratio of hydraulic power output to mechanical power input.

Q3: What is the significance of the constant 3960?
A: The constant 3960 converts the units to horsepower (1 hp = 550 ft-lb/sec, and there are 60 seconds in a minute).

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

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