冷却塔计算器 — 公式

Cooling Tower Water Balance

Cooling towers reject heat through evaporation, requiring continuous makeup water.

Formulas

Heat rejected = m_dot cp delta_T

Evaporation rate = 0.00085 x Circulation (m^3/h) x Range (deg C)

The 0.00085 factor is an approximation for the fraction evaporated per degree of cooling. Blowdown removes concentrated water to limit mineral buildup: Blowdown = Evaporation / (Cycles - 1)

Makeup = Evaporation + Blowdown

计算示例

50 L/s circulation, 8 deg C range, 4 cycles of concentration.

  1. Heat rejected = 50 x 4.18 x 8 = 1672 kW
  2. Circulation = 50 x 3.6 = 180 m^3/h
  3. Evaporation = 180 x 8 x 0.00085 = 1.224 m^3/h
  4. Blowdown = 1.224 / (4-1) = 0.408 m^3/h
  5. Makeup = 1.224 + 0.408 = 1.632 m^3/h