Compute the heating-steam demand of a feedwater deaerator from an energy and mass balance on IAPWS-IF97 enthalpies: m_feed·h_feed + m_steam·h_steam = (m_feed+m_steam)·h_out, with h_out the saturated-liquid enthalpy at the deaerator pressure. Covers atmospheric (~104C) and pressurized (130-160C) types.
Inputs
| Parameter | Notes |
|---|---|
| Feedwater flow (kg/h) | Makeup + condensate |
| Feedwater temp (C) | Subcooled inlet |
| Deaerator pressure (kPa abs) | Sets outlet sat. T |
| Heating steam pressure/temp | Saturated or superheated |
Outputs
| Output | Basis |
|---|---|
| Heating steam (kg/h) | From the balance |
| Steam fraction of feed (%) | Sizing check |
| Outlet water flow & enthalpy | Deaerated water |
Standards & Method
Steam/water energy and mass balance on IAPWS-IF97 enthalpies. Add ~0.1-0.5% vent steam and confirm O2 stripping performance for design.
Open the Deaerator Heat Balance Calculator →
Screening-level preliminary calculation. Verify against project standards and vendor data before engineering use.