1. What is Hydraulic Power Calculation?

Definition: This calculator determines the hydraulic power required by a pump based on flow rate, head, fluid density, and pump efficiency.

Purpose: It helps engineers and technicians properly size pumps for hydraulic systems in various applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Hydraulic power (HP)
• \( Q \) — Flow rate (GPM)
• \( H \) — Head (ft)
• \( \rho \) — Fluid density (lb/gal)
• \( \eta \) — Pump efficiency (dimensionless, 0-1)

Explanation: The formula calculates the theoretical power required to move fluid at a given flow rate against a specific head, adjusted for pump efficiency.

3. Importance of Hydraulic Power Calculation

Details: Accurate power calculation ensures proper pump selection, energy efficiency, and system reliability in hydraulic applications.

4. Using the Calculator

Tips: Enter the flow rate in GPM, head in feet, fluid density (default 8.34 lb/gal for water), and pump efficiency (default 0.85). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the 3960 constant in the formula?
A: This is a conversion factor that combines various unit conversions to give the result in horsepower.

Q2: What's a typical pump efficiency value?
A: Most pumps operate between 70-90% efficiency (0.7-0.9), with 0.85 being a common default value.

Q3: How do I determine the head (H)?
A: Head is the total dynamic head which includes static head, friction losses, and pressure differences in the system.

Q4: What if my fluid isn't water?
A: Adjust the density value accordingly (e.g., 7.2 lb/gal for diesel, 9.0 lb/gal for seawater).

Q5: How does this relate to motor power?
A: The calculated power is hydraulic power. Motor power would be higher to account for mechanical losses.