Deaerator simulation

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

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.

$H_{in}$

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

Example flowsheets that use it