1. What is Pump Efficiency?

Pump efficiency (η) is a measure of how effectively a pump converts electrical energy into hydraulic energy. It represents the ratio of hydraulic power output to electrical power input, expressed as a percentage.

2. How Does the Calculator Work?

The calculator uses the pump efficiency formula:

Where:

• \( \eta \) — Pump efficiency (%)
• Hydraulic Power — Power delivered to the fluid (W)
• Electrical Power — Power consumed by the pump (W)

Explanation: The formula calculates what percentage of the electrical energy input is effectively converted to hydraulic energy output.

3. Importance of Pump Efficiency Calculation

Details: Calculating pump efficiency is crucial for energy conservation, cost savings, system optimization, and environmental sustainability. Higher efficiency pumps reduce energy consumption and operating costs.

4. Using the Calculator

Tips: Enter both hydraulic power and electrical power in watts (W). Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is considered good pump efficiency?
A: Efficiency varies by pump type and size, but typically ranges from 50-85% for centrifugal pumps and can reach 90%+ for positive displacement pumps.

Q2: How can I improve pump efficiency?
A: Proper sizing, regular maintenance, impeller trimming, variable speed drives, and reducing system resistance can improve efficiency.

Q3: Why is my pump efficiency low?
A: Common causes include wear, incorrect sizing, cavitation, clogged impellers, or excessive system pressure losses.

Q4: How is hydraulic power calculated?
A: Hydraulic power = (Flow rate × Total head × Fluid density × Gravity) / Efficiency.

Q5: Should efficiency be measured at different operating points?
A: Yes, pump efficiency varies with flow rate, so it's best to measure across the expected operating range.