1. What is Combustion Air Calculation?

Combustion air calculation determines the volume of air required for complete combustion of fuel in a boiler system. Proper air volume ensures efficient fuel burning, optimal heat transfer, and minimizes emissions.

2. How Does the Calculator Work?

The calculator uses the air volume formula:

Where:

• \( Fuel Input \) — Amount of fuel consumed per hour (kg/h)
• \( Air-Fuel Ratio \) — Volume of air required per unit of fuel (m³ air/kg fuel)
• \( Efficiency \) — Combustion efficiency percentage (%)

Explanation: The formula calculates the theoretical air volume needed for complete combustion, adjusted for the actual efficiency of the boiler system.

3. Importance of Air Volume Calculation

Details: Accurate air volume calculation is essential for boiler design, optimization of combustion efficiency, reduction of fuel consumption, and compliance with environmental regulations for emissions control.

4. Using the Calculator

Tips: Enter fuel input in kg/h, air-fuel ratio in m³ air/kg fuel, and efficiency as a percentage. All values must be positive numbers with efficiency between 0-100%.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical air-fuel ratio for boilers?
A: Air-fuel ratios vary by fuel type but typically range from 10-15 m³ air/kg fuel for natural gas, 12-18 for oil, and 6-8 for coal.

Q2: Why is efficiency included in the calculation?
A: Efficiency accounts for real-world combustion conditions, heat losses, and incomplete combustion that require additional air beyond theoretical requirements.

Q3: What happens with insufficient combustion air?
A: Insufficient air leads to incomplete combustion, reduced efficiency, increased fuel consumption, and higher emissions of carbon monoxide and soot.

Q4: Can excess air be problematic?
A: Yes, excess air cools the combustion chamber, reduces efficiency, increases heat losses through flue gases, and may cause corrosion issues.

Q5: How often should air volume calculations be performed?
A: Calculations should be done during boiler design, after modifications, and periodically during operation to maintain optimal combustion conditions.