1. What is Fan Power Calculation?

Fan power calculation determines the electrical power required to operate a fan based on flow rate, pressure difference, and efficiency. This is essential for proper fan selection and energy consumption estimation in HVAC and ventilation systems.

2. How Does the Calculator Work?

The calculator uses the fan power equation:

Where:

• \( P \) — Fan power (kW)
• \( Q \) — Flow rate (m³/s)
• \( \Delta P \) — Pressure difference (Pa)
• \( \eta \) — Efficiency (0-1)
• 1000 — Conversion factor (W/kW)

Explanation: The equation calculates the mechanical power required to move air against pressure resistance, adjusted for the fan's efficiency.

3. Importance of Fan Power Calculation

Details: Accurate fan power calculation is crucial for proper system design, energy efficiency optimization, correct motor sizing, and cost estimation in ventilation and air conditioning projects.

4. Using the Calculator

Tips: Enter flow rate in m³/s, pressure difference in Pa, and efficiency as a decimal between 0 and 1. All values must be positive and efficiency should not exceed 1.

5. Frequently Asked Questions (FAQ)

Q1: What is typical fan efficiency range?
A: Fan efficiency typically ranges from 0.4 to 0.8 (40-80%), with higher efficiency fans being more expensive but saving energy costs.

Q2: How does pressure difference affect power consumption?
A: Power consumption increases linearly with pressure difference. Doubling the pressure difference doubles the power requirement.

Q3: What units should I use for flow rate?
A: The calculator requires m³/s. For other units, convert first: 1 m³/s = 3600 m³/h = 2118.88 CFM.

Q4: Why is efficiency important in fan selection?
A: Higher efficiency fans consume less electricity for the same airflow, reducing operating costs and environmental impact.

Q5: Can this calculator be used for pumps?
A: While the principle is similar, pump power calculations may use different efficiency factors and units. Use dedicated pump calculators for accurate results.