1. What is Water Horsepower?

Definition: Water horsepower (WHP) is the theoretical power required to move water based on flow rate and pressure.

Purpose: It helps engineers and pump operators determine the energy needed to move water in hydraulic systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( WHP \) — Water horsepower (hp)
• \( Q \) — Flow rate (gallons per minute, GPM)
• \( H \) — Total head (feet, ft)
• \( 8.34 \) — Weight of water (lbs/gallon)
• \( 3960 \) — Conversion factor (ft-lbs/min per hp)

Explanation: The formula calculates the power required to lift water at a given flow rate against a specified head.

3. Importance of Water Horsepower

Details: WHP is crucial for pump selection, system design, and energy efficiency calculations in water systems.

4. Using the Calculator

Tips: Enter the flow rate in GPM and total head in feet. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between WHP and BHP?
A: WHP is theoretical power, while Brake Horsepower (BHP) includes pump efficiency and is the actual power required.

Q2: What is total head?
A: Total head is the vertical distance the water must be lifted plus friction losses in the system.

Q3: Why is 8.34 used in the formula?
A: 8.34 lbs/gallon is the weight of water at standard conditions (60°F).

Q4: How do I convert WHP to kilowatts?
A: Multiply WHP by 0.746 to convert to kilowatts.

Q5: What's a typical WHP for residential wells?
A: Most residential systems range from 0.5 to 2 WHP, depending on flow rate and head.