18/08/2026
💧 Cooling Tower Make-Up Water Line Calculation
The make-up water line supplies fresh water to the cooling tower to replace water lost through evaporation, blowdown and drift.
📐 Make-Up Water Formula
Make-Up Water = Evaporation Loss + Blowdown Loss + Drift Loss
🔢 Example
💨 Evaporation Loss = 2.0 m³/h
💧 Blowdown = 0.5 m³/h
🌫️ Drift Loss = 0.02 m³/h
Make-Up Water = 2.0 + 0.5 + 0.02
👉 Make-Up Water = 2.52 m³/h
🚰 Make-Up Line Sizing
After calculating the required flow, select the pipe size based on:
💧 Required flow rate
📏 Allowable velocity
📉 Pressure loss
🔧 Available supply pressure
⚙️ Float/level control valve capacity
📌 Important: The make-up line should be sized for the required peak make-up flow and should maintain reliable tower basin level under operating conditions.
🎯 Caption
💧🏭 Cooling Tower Make-Up Water Line Calculation – How Much Fresh Water Does a Cooling Tower Need? 🌡️
💨 Evaporation = 2.0 m³/h
💧 Blowdown = 0.5 m³/h
🌫️ Drift = 0.02 m³/h
🚰 Make-Up Water = 2.52 m³/h
📐 Make-Up = Evaporation + Blowdown + Drift
📌 Save this formula for your next HVAC & MEP calculation! 🚀
