Vacuum Distillation • Jacket-Water Heat • Condenser Duty • Ejector Performance • Salinity Control • Distillate Production • Fouling • Low-Load Capacity
Marine Freshwater Generator Capacity, Vacuum & Distillate Production Tool
Screen a shipboard vacuum freshwater generator as a complete heat-and-mass balance. Simple mode estimates production from jacket-water heat, vacuum boiling temperature, equipment capacity and salinity status. Advanced mode compares multiple operating points, evaporation and condensation limits, brine concentration, fouling, ejector/vacuum condition, distillate demand and measured performance.
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Fast performance screen with 9 inputs.The tool estimates gross distillate production from available jacket-water heat and the measured vacuum condition, caps production at the entered OEM capacity, and separately decides whether that distillate is accepted or diverted based on the entered salinity limit.VacuumPressure → boiling temperature
HeatJacket-water evaporation duty
QualityAccept or divert distillate
Freshwater Generator Condition
m³/day at the maker's stated reference condition.
m³/h.
°C.
°C.
°C. Used for condenser-temperature context.
kPa absolute. About 12.3 kPa corresponds to ~50°C saturation temperature.
% effective thermal condition after fouling / scaling allowance.
ppm or mg/L as displayed by the vessel instrument.
User-entered vessel / maker setting.
Unit & Operating Limits
m³/day.
kPa absolute.
°C between jacket-water outlet and boiling temperature.
°C between boiling temperature and seawater outlet.
ppm / mg/L, user-entered.
m³/day.
g/kg or ppt for brine concentration estimate.
Feed volume divided by gross distillate volume.
g/kg or ppt, user-entered scale / concentration reference.
Equipment Condition Factors
% of clean/reference performance.
% of clean/reference performance.
% quality / carryover effectiveness applied to gross production.
% condition indicator used diagnostically, not as a hidden capacity multiplier.
Operating Point Register
Enter measured or planned conditions. Evaporator heat is taken from jacket-water flow × ΔT. Condenser duty is taken from seawater flow × ΔT. The lower thermal-side production limit governs before the OEM capacity cap.
| Use | Point | Share % | JW flow m³/h | JW in °C | JW out °C | SW flow m³/h | SW in °C | SW out °C | Abs press kPa | Salinity ppm | Measured m³/d |
|---|
Operational Checks
Engineering boundary: this tool screens vacuum-evaporator capacity and operating condition. It does not replace the maker's performance curves, commissioning data, salinometer calibration, potable-water treatment requirements, or vessel-specific operating procedures.