Cooling and Industrial Water Management

Stage 01 · Source basis

Makeup-Water Characterization

Set cooling-loop quality and demand basis.

Purpose

Declare the source, seasonal quality envelope, available volume, and end-use requirements that constrain cooling chemistry and water balance.

Next decision

Choose the conditioning and balance basis for the loop.

Engineering questions

What is the makeup source, flow envelope, and seasonal or event-driven variability?
What are pH, conductivity/TDS, hardness, alkalinity, silica, chloride, temperature, turbidity, and relevant residuals?
Is the source reclaimed water, and what treatment history or compatibility limits apply?

Key inputs

Available and design makeup flowm³/h
Makeup-water temperature envelope°C
Makeup pH rangepH
Makeup conductivityµS/cm
Makeup TDSmg/L
Calcium hardnessmg/L as CaCO₃
Alkalinitymg/L as CaCO₃
Dissolved silicamg/L as SiO₂
Chloridemg/L
Suspended solids / turbiditymg/L / NTU
Source identity, reuse provenance, and variability casesproject basis

Key outputs

Declared makeup-quality and source envelopeproject basis
Available makeup supply basism³/h

Design Considerations

Cooling-water compatibility depends on the actual metallurgy, heat-transfer surfaces, treatment program, operating cycles, and discharge route.
Reclaimed water requires source-specific constituent, residual, and variability review; a source label alone is not a compatibility assessment.

Tools for this stage

Available Unit Converter Supporting: convert declared flow, pressure, and concentration units; this does not characterize water or assess cooling compatibility. Open tool

Engineering guidance Makeup-Water Characterization No current ATLAS tool characterizes makeup-water quality, forecasts seasonal variability, or evaluates reclaimed-water compatibility with the cooling system.

Supporting research

The Water Treatment Challenge Behind the AI Data Center Boom: How Cooling Architecture, Reclaimed Water, Cycles of Concentration and Brine Management Define Hyperscale Water UseA 300 MW engineering analysis of how heat rejection, reclaimed-water chemistry, cycles of concentration, selective membrane pretreatment and residuals management determine the real water footprint of hyperscale AI data centers.

Stage 02 · Chemical conditioning

Conditioning

Control scaling, corrosion, and biology.

Purpose

Set the circulating-water scale, corrosion, deposition, and biological-control basis against metallurgy, operating cycles, and discharge limits.

Next decision

Set the cooling-system balance and cycles basis.

Engineering questions

What supplied-water saturation indicators and constituent limits govern, including calcium hardness, alkalinity, silica, and chloride?
Which inhibitor, pH adjustment, oxidizing or non-oxidizing biocide, monitoring, and control program is supported by project data?
Is sidestream filtration or reclaimed-water pretreatment needed, and how will dose, residuals, and metallurgy be verified?

Key inputs

Circulating-water flowm³/h
Cold / hot circulating-water temperatures°C
Circulating-water pHpH
Circulating-water TDSmg/L
Calcium hardnessmg/L as CaCO₃
Alkalinitymg/L as CaCO₃
Dissolved silicamg/L as SiO₂
Chloridemg/L
Metallurgy, corrosion, and deposit-control criteriaproject basis
Biological-control and monitoring criteriaproject basis
Selected chemical and dose, where testedmg/L

Key outputs

Supplied-water LSI / RSI screening basisindex
Declared chemical feed basismg/L
Declared corrosion monitoring basisproject basis

Design Considerations

LSI/RSI are empirical screening indicators based on supplied chemistry; they do not predict metal-specific corrosion, silica behavior, scale deposition rate, or biocide efficacy.
The dosing calculator calculates feed and batch quantities for a selected chemical and dose; it does not select an inhibitor/biocide program or set a cooling-water control strategy.
Sidestream filtration and reclaimed-water compatibility require measured solids/chemistry, metallurgy, vendor, and project review.

Tools for this stage

Available Cooling Tower Water Balance & LSI Calculator Supporting: screen water balance and supplied-water LSI/RSI; indices do not select a treatment program or predict corrosion. Open tool Available Chemical Dosing Basis Calculator Supporting: calculate feed and batch quantities after the chemical and dose are selected; it does not choose the program. Open tool

Engineering guidance Conditioning No ATLAS tool selects a cooling-water treatment program, predicts corrosion or biological control, or sizes sidestream filtration.

Supporting research

No stage-specific research mapping is published for this boundary.

Stage 03 · Other

Cooling-System Balance

Connect evaporation, cycles, makeup, and blowdown.

Purpose

Connect the declared cooling duty and circulation basis to evaporation, cycles of concentration, drift, blowdown, and makeup demand.

Next decision

Decide how blowdown is controlled, treated, and discharged or reused.

Engineering questions

What heat-rejection duty, circulating flow, and hot-to-cold water range govern?
What evaporation coefficient, drift class, and target cycles of concentration are justified by site conditions?
What makeup and blowdown flows result, and which measured circulating-water chemistry is used for saturation screening?

Key inputs

Heat-rejection dutykW
Circulating-water flowm³/h
Hot and cold circulating-water temperatures / index temperature°C
Target cycles of concentrationratio
Drift-eliminator class / drift assumption%
Evaporation coefficient and operating assumptionproject basis
Measured circulating-water TDSmg/L
Measured circulating-water pHpH
Measured calcium hardnessmg/L as CaCO₃
Measured circulating-water alkalinitymg/L as CaCO₃

Key outputs

Calculated heat-rejection estimate from flow and temperature rangekW
Estimated evaporation lossm³/h
Estimated drift lossm³/h
Estimated blowdown flow at target cyclesm³/h
Estimated makeup demandm³/h
Target / achieved cycles basisratio

Design Considerations

The balance is a screening estimate from declared circulation, range, drift, and cycles; heat rejected is informational and does not size tower hardware or determine circulation from a heat load.
LSI/RSI is calculated only from supplied chemistry and does not establish the allowable cycles for silica, chloride, corrosion, biology, or metallurgy.

Tools for this stage

Available Cooling Tower Water Balance & LSI Calculator Primary: screen evaporation, drift, blowdown, makeup, cycles, heat-rejection estimate, and supplied-water LSI/RSI. Open tool

Engineering guidance Cooling-System Balance No current ATLAS tool performs cooling-tower mechanical selection, wet-bulb/approach performance, or control-system design.

Supporting research

Stage 04 · Residuals

Blowdown

Define the residual stream and control point.

Purpose

Carry the estimated blowdown flow and chemistry into treatment, reuse, residuals, and discharge review.

Next decision

Confirm reuse or discharge context and the water-use objective.

Engineering questions

What blowdown flow, chemistry, treatment residuals, and variability are expected?
Is the stream suitable for direct reuse, sidestream filtration, RO, or another treatment after compatibility and treatability review?
Which residual or constituent controls disposal, reuse, or discharge?

Key inputs

Blowdown flow and operating rangem³/h
Blowdown TDSmg/L
Blowdown feed temperature°C
Declared feed / boundary pressurebar
Blowdown calcium hardnessmg/L as CaCO₃
Blowdown dissolved silicamg/L as SiO₂
Blowdown chloridemg/L
Treatment residuals and added chemical basisas measured
Reuse or discharge objective and limitsproject basis

Key outputs

Declared blowdown treatment / reuse basisproject basis
Residuals and discharge review basisproject basis

Design Considerations

Cooling-water balance can estimate blowdown flow but does not select blowdown treatment or determine reuse/discharge quality.
RO screening requires a characterized feed and defined recovery objective; it does not design pretreatment, sidestream filtration, concentrate handling, or permit compliance.

Tools for this stage

Available Cooling Tower Water Balance & LSI Calculator Supporting: recheck blowdown and makeup flows under the declared range, drift, and cycles assumptions. Open tool Available RO System Designer Conditional: screen a selected RO option for characterized blowdown; not a treatment train or discharge evaluation. Open tool

Engineering guidance Blowdown No ATLAS tool selects blowdown treatment, sizes sidestream filtration, validates reclaimed-water compatibility, or evaluates discharge limits and residuals.

Supporting research

Stage 05 · Reuse / discharge

Reuse or Discharge Context

Carry the balance into the permitting decision.

Purpose

Connect a fit-for-purpose reuse decision or receiving-water discharge basis to water availability, cooling materials, operating chemistry, and residuals controls.

Next decision

Carry the declared balance and chemistry basis into equipment, controls, and permitting review.

Engineering questions

What reclaimed-water quality and variability are acceptable for the cooling materials and treatment program?
Which current permit, receiving-water, and monitoring requirements govern blowdown?
How do source substitution and discharge constraints change cycles, makeup demand, treatment, and residuals?

Key inputs

Reuse / discharge flowm³/h
Reclaimed-water or receiving-water qualityproject basis
Residual TDSmg/L
Silicamg/L as SiO₂
Chloridemg/L
Operating cycles basisratio
Treatment residuals and permit criteriaproject basis

Key outputs

Declared reuse / discharge quality basisproject basis
Declared water-use and makeup basism³/h
Monitoring and residuals review basisproject basis

Design Considerations

No tool validates reclaimed-water compatibility against metallurgy, biocide residuals, cycles, or water-use specifications.
Current permits, receiving-water limits, and project standards govern discharge; this workflow provides no compliance determination.

Engineering guidance

Engineering guidanceReuse or Discharge ContextNo ATLAS tool determines reclaimed-water compatibility, cooling treatment limits, permit compliance, or blowdown residuals management.

Supporting research

Search ATLAS engineering resources

Cooling and Industrial Water Management

Cooling Water Decision Train

Tools for Stage 01 — Makeup-Water Characterization

Tools for Stage 02 — Conditioning

Tools for Stage 03 — Cooling-System Balance

Tools for Stage 04 — Blowdown

Engineering guidance — Stage 05 — Reuse or Discharge Context

Makeup-Water Characterization

Tools for this stage

Supporting research

Conditioning

Tools for this stage

Supporting research

Cooling-System Balance

Tools for this stage

Supporting research

Blowdown

Tools for this stage

Supporting research

Reuse or Discharge Context

Engineering guidance

Supporting research

Research and Intelligence Context