This calculator performs the mass, energy and conductivity balance of a deaerator feeding up to three boilers: required deaerating steam, makeup flow, actual blowdown of each boiler based on its conductivity, and feedwater conductivity. Condensate returns are entered as a percentage of steam produced or as a flow; makeup is calculated by the balance.
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Deaerator mass, energy and conductivity balance
This calculator is provided for information only. Results rely on simplified assumptions and must be interpreted with judgement; they do not replace a detailed analysis. All data and results must be validated by an engineer before being used for design, equipment selection or operation.
Boilers
| No. 1 | No. 2 | No. 3 | Unit | |
|---|---|---|---|---|
| Steam flow leaving the boiler | ||||
| Operating pressure | ||||
| Steam quality dry fraction | % | |||
| Boiler water conductivity |
Condensate returns and makeup
| Stream | Flow | Temp. | Conductivity |
|---|---|---|---|
| Returns < 197 °F | Calculated conductivity | ||
| Returns 197–227 °F | Calculated conductivity | ||
| Returns > 227 °F, flashing | Calculated conductivity | ||
| Makeup treated | Calculated flow |
Deaerator
%
Tank radiation losses
—lb/h
Deaerating steam
—lb/h
Makeup to deaerator
—lb/h
Feedwater
—µS/cm
Feedwater conductivity
—lb/h
Total blowdown
—°F
Outlet temperature
Conductivity balance
| Deaerator inlets | lb/h | % of feedwater | µS/cm | ppm TDS | Solids lb/h |
|---|---|---|---|---|---|
| Outlet to boilers | lb/h | % of feedwater | µS/cm | ppm TDS | Solids lb/h |
Boiler blowdown balance
| Boiler | Steam lb/h | Steam µS/cm | Boiler water µS/cm | Blowdown lb/h | Blowdown % of feedwater | Feedwater lb/h |
|---|
Deaerator balance
| Inlets | lb/h | % of feedwater | °F | Btu/lb | MBtu/h | ppm TDS | Solids lb/h |
|---|---|---|---|---|---|---|---|
| Outlets | lb/h | % of feedwater | °F | Btu/lb | MBtu/h | ppm TDS | Solids lb/h |