Evaporator (effect) simulation

process feed + heating steam -> concentrated liquid + vapor boiloff + steam condensate

Governing equations

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

$Q_{cond}$

heat released by condensing the heating steam [W]

$Q_{process}$

heat actually reaching the process [W]

$\eta$

heat-transfer efficiency [0..1]

$\dot n_{steam}$

heating-steam molar flow [mol/s]

$h_{steam}, h_{cond}$

steam and condensate molar enthalpies [J/mol]

$T_{sat}$

saturation temperature of the heating steam [K]

$h_{feed}, h_{out}$

process molar enthalpies in and out [J/mol]

$\dot n_{feed}$

process molar flow [mol/s]

Parameters

pressure [Pa, the effect's vapor-space pressure, default = process feed pressure]; optional efficiency [0..1, condensing-duty transfer to the process side, default 1.0]. 2 inlets [process_feed, steam_in]; steam condenses fully at its own pressure, the recovered duty (scaled by efficiency) drives a (P,H) flash of the process side. Chain effects by wiring vapor_boiloff -> the next effect's steam_in; pair with an electrolyte thermo package (e.g. brine) for real boiling-point elevation as the liquor concentrates.

Example flowsheets that use it