Cooling Tower Range and Approach Calculator
Evaporative Heat Transfer: Calculate cooling range ($\Delta T_{range}$), approach ($\Delta T_{app}$), thermal effectiveness ($\epsilon$), and water evaporation losses.
Water Temperatures & Circulation
Water Treatment & Cycles
Tower Performance & Makeup Water
Cooling Range ($\Delta T_{range}$)
-- °F
Approach: -- °F
Thermal Effectiveness ($\epsilon$)
-- %
Target: 55% - 75% typical
Heat Rejection ($Q_{rej}$)
-- MMBtu/hr
Nominal Tower Tons: -- TR
Total Makeup Water
-- GPM
Evap: -- / Blowdown: --
Cooling Tower Metrics:
• $\text{Range} = T_{hot} - T_{cold}$, $\text{Approach} = T_{cold} - T_{wb}$. Effectiveness $\epsilon = \frac{\text{Range}}{\text{Range} + \text{Approach}}$.
• Makeup water = Evaporation + Blowdown + Drift. Evaporation $\approx 0.0008 \cdot GPM \cdot \text{Range}$.
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