Utilities
Steam Requirement Calculator
Calculate the steam required to heat milk or product from inlet to target temperature. Essential for dairy pasteurization and heating process design.
Formula
(massFlowRate * specificHeat * (tempOut - tempIn)) / steamLatentHeat
massFlowRate
Mass Flow Rate (kg/hr)
specificHeat
Specific Heat of Product (kcal/kg°C)
tempIn
Inlet Temperature (°C)
tempOut
Outlet Temperature (°C)
steamLatentHeat
Latent Heat of Steam (kcal/kg)
Worked Example
1
Given:
massFlowRate = 5000
specificHeat = 0.93
steamLatentHeat = 540
tempIn = 5
tempOut = 72
2
Apply the formula:
(massFlowRate * specificHeat * (tempOut - tempIn)) / steamLatentHeat
3
Result:576.85 kg/hr
Steam in Dairy Processing
Steam is the primary heating medium in dairy plants. It is used for:
- Pasteurization: Heating milk to kill pathogens
- CIP cleaning: Hot water and caustic heating
- Evaporation: Concentrating milk for powder production
- Sterilization: UHT processing for long-life milk
The Steam Calculation Formula
Steam Required (kg/hr) = [Mass Flow Rate × Specific Heat × (T_out − T_in)] ÷ Latent Heat of Steam
Key Parameters
Specific Heat of Common Liquids
| Liquid | Specific Heat (kcal/kg°C) |
|---|---|
| Water | 1.000 |
| Milk (whole) | 0.930 |
| Skim milk | 0.940 |
| Cream (40% fat) | 0.780 |
| Whey | 0.955 |
Latent Heat of Steam
| Pressure (bar g) | Temp (°C) | Latent Heat (kcal/kg) |
|---|---|---|
| 0 (atmospheric) | 100 | 540 |
| 1 | 120 | 526 |
| 2 | 134 | 514 |
| 3 | 143 | 504 |
| 4 | 152 | 495 |
Tips for Reducing Steam Consumption
- Use plate heat exchangers for regeneration
- Insulate all steam pipes and process vessels
- Maintain correct steam trap function
- Minimize condensate losses
- Optimize heating profiles