Utilities
Boiler Fuel Consumption Calculator
Calculate boiler fuel consumption rate based on steam demand, boiler efficiency, and fuel calorific value for dairy plant utilities.
Formula
(steamOutput * (enthalpySteam - enthalpyFeedwater)) / ((efficiency / 100) * calorificValue)
steamOutput
Steam Demand / Generation (kg/hr)
enthalpySteam
Enthalpy of Steam (kcal/kg)
enthalpyFeedwater
Enthalpy of Feed Water (kcal/kg)
efficiency
Boiler Efficiency (%)
calorificValue
Gross Calorific Value of Fuel (kcal/kg)
Worked Example
1
Given:
calorificValue = 8000
efficiency = 75
enthalpyFeedwater = 60
enthalpySteam = 660
steamOutput = 2000
2
Apply the formula:
(steamOutput * (enthalpySteam - enthalpyFeedwater)) / ((efficiency / 100) * calorificValue)
3
Result:200 kg/hr
What is Boiler Fuel Consumption?
Boiler fuel consumption represents the quantity of fuel burned per hour to meet a specific steam generation demand. Understanding your fuel consumption rate is essential for utility cost forecasting, fuel inventory management, and carbon footprint tracking in dairy and food processing facilities.
Fuel Rate (kg/hr) = [Steam Demand × (H_steam − H_feedwater)] ÷ [Boiler Efficiency × Calorific Value]
Where:
- Steam Demand is the rate of steam generated (kg/hr)
- H_steam is the enthalpy of the generated steam (kcal/kg)
- H_feedwater is the enthalpy of feed water (kcal/kg)
- Boiler Efficiency is the thermal efficiency (expressed as a fraction)
- Calorific Value is the gross heat energy content of the fuel (kcal/kg)
Typical Fuel Rates for Common Scenarios
| Steam Demand | Boiler Type | Fuel Used | Est. Fuel Rate |
|---|---|---|---|
| 2,000 kg/hr | Fire Tube | Rice Husk | ~200-240 kg/hr |
| 5,000 kg/hr | Water Tube | Coal | ~600-700 kg/hr |
| 2,000 kg/hr | Packaged | Diesel | ~120-140 kg/hr |
Fuel Sourcing and Storage Tips
- Safety stock: Keep at least 7-10 days of solid fuel (husk, coal) stored under cover to avoid moisture absorption.
- Moisture content: Biomass and husk should have less than 10-12% moisture. Every 1% increase in fuel moisture drops boiler efficiency by about 0.1%.
- Daily logging: Compare actual daily fuel usage with calculator output to check for abnormal losses or low burner efficiency.