方法
蒸发、风吹与排污遵循标准的质量守恒水平衡关系（CTI/ASHRAE 惯例）：蒸发损失与循环水量 x 冷却温差成正比，风吹损失取决于所选除雾器性能等级，强制排污量则直接由稳态浓缩倍数质量守恒方程求解。
结垢/腐蚀倾向采用朗格利尔饱和指数（Langelier, 1936）计算，基于水温、pH、钙硬度、总碱度与 TDS，并纳入瑞兹纳稳定指数作为二次校核 —— 两者均为经验性筛查指标，不能替代完整的水处理药剂方案。
ATLAS WTS · Process Engineering
Cooling Tower Water Balance & LSI Calculator
Evaporation, drift, blowdown and makeup water balance from mass conservation, plus Langelier Saturation Index scaling/corrosion risk screening for the circulating water.
Project Information
Heat Load & Water Balance
Cooling range (ΔT): —
Typical operating range: 3–6.
Default 0.00153 (metric, m³/h & °C basis) — see methodology note below. Typical range 0.00115–0.00195 for climate variation.
Circulating Water Chemistry (for LSI)
Estimate from Makeup Water Optional
If you only have makeup water lab data on hand, enter it here and estimate the concentrated circulating-water values (Ca, Alkalinity, TDS all scale × CoC at steady state). Note: pH does not scale linearly with CoC (CO2 stripping in the tower shifts the carbonate equilibrium) — estimated circulating pH typically settles between 8.2–8.8 unless acid is dosed. Enter your own circulating water pH reading above rather than scaling it.
Water Balance Results
Evaporation Loss (E)
—m³/h
E = k × Flow × ΔT
Drift Loss (D)
—m³/h
—
Blowdown Required (B)
—m³/h
B = E/(CoC−1) − D
Total Makeup Water (M)
—m³/h
M = E + D + B
Achieved CoC: —
Heat rejected (informational): —
Scaling & Corrosion Risk (LSI)
Saturation pH (pHs)
—
Langelier Saturation Index
—
LSI = pH − pHs
Ryznar Stability Index
—
RSI = 2×pHs − pH
Design Notes & Warnings
Export includes the current water balance and water chemistry configuration and results.
Evaporation coefficient: the commonly cited "0.0008/0.00085 × flow × range" rule of thumb is an imperial constant (gpm, °F) — used directly against a Celsius ΔT without the required ×1.8 unit conversion it understates evaporation by roughly 1.8×. This tool defaults to the converted metric constant, 0.00153, cross-checked against the independent "~1% evaporation per 5.6°C range" industry rule of thumb.
此工程工具目前仅提供英文版本。
01
工程依据
标准 / 参考依据
范围 / 限制
- LSI 和 RSI 是经验筛查指标，不能替代完整的水处理药剂方案。
- 基于 CTI/ASHRAE 质量守恒水平衡；采用朗格利尔（1936）饱和指数与瑞兹纳稳定指数进行厂家中立的结垢/腐蚀风险筛查。
02
工程路径
应用
- 能源与数字基础设施 电力、冷却与数据中心水系统。
场景
- 数据中心冷却与水策略 优化超大规模冷却回路中的水分利用效率 (WUE)。
- 发电：锅炉给水与冷却 确保火电厂和核电厂涡轮机完整性的高纯度水循环。