COOLING WATER CALCULATOR

Annual scale & corrosion inhibitor and biocide dosage

Built on the internationally accepted mass-balance (cycles of concentration) method together with the Langelier (LSI) and Ryznar (RSI) indices, with automatic POLYTE® product recommendations. All calculations run locally in your browser — no data is uploaded.

1. System parameters

Recirculation rate Q_Rm³/h System holding volume Vm³ Inlet temperature T_in°C Outlet temperature T_out°C Cycles of concentration Ncycles Drift loss D% of Q_R Annual operating hours h_oph/yr

2. Make-up water quality

pH (25°C)— Total hardnessmg/L as CaCO₃ Calcium hardnessmg/L as CaCO₃ M-alkalinitymg/L as CaCO₃ TDSmg/L Chloride Cl⁻mg/L Silica SiO₂mg/L

3. Dosing strategy

Recirculating inhibitor target C_Rppm Oxidising biocide shock doseppm (basis V) Oxidising biocide shocks/year/yr Non-oxidising biocide shock doseppm (basis V) Non-oxidising biocide shocks/year/yr Phosphorus-free formulation required (e.g. discharge regulations) New / freshly acid-cleaned system (prefilm needed first)

Results follow the internationally accepted mass-balance + LSI / RSI engineering estimation. They are intended for proposal discussions and annual budgeting. The final dosing concentration, product code and dosing strategy must be confirmed by an engineer based on full on-site water analysis and operating experience.

Cooling Water Calculator

Annual scale & corrosion inhibitor and biocide dosage

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