Deaerator simulation

2 inlets (feedwater, LP steam) -> 1 outlet (deaerated water)

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Governing equations

The exact equations the solver works for a deaerator — the same math shown in the app's "Theory" panel, not a black box.

H_{in} = \sum_k F_k\,h_k,\qquad m_{tot} = \sum_k F_k

H_{in} = m_{liq}h_L(P) + \dot m_{vent}h_V(P),\qquad m_{liq} + \dot m_{vent} = m_{tot}

\dot m_{vent} = \frac{H_{in} - m_{tot}\,h_L(P)}{h_V(P) - h_L(P)},\quad T_{out} = T_{sat}(P)

H_{in}: total enthalpy flow of the two feeds [W]
F_k: inlet k molar flow [mol/s]
h_k: inlet k molar enthalpy [J/mol]
m_{tot}: total feed molar flow [mol/s]
P: deaerator operating pressure [Pa]
T_{sat}(P): saturation temperature at P [K]
m_{liq}: deaerated saturated-liquid outlet flow [mol/s]
\dot m_{vent}: vent steam boiled off (strips the dissolved gases) [mol/s]
h_L(P): saturated-liquid enthalpy at P [J/mol]
h_V(P): saturated-vapor enthalpy at P [J/mol]

Parameters

two inlets (feedwater + LP heating steam) -> a deaerated saturated-liquid outlet at the operating pressure [Pa, param 'pressure', default = min inlet pressure]. Mixes and energy-balances to saturated liquid; the excess boils off (reported as vent_rate), steam_consumed reports the heating-steam draw. Equilibrium screening model (no rate-based O2/CO2 stripping). Use SteamPkg/IAPWS thermo

Deaerator simulation

Governing equations

Parameters

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