Freshwater Generator (Evaporator)
medium
Vacuum evaporator producing freshwater from seawater using waste heat
4000h
Service Interval
20 yr
Typical Lifetime
Typical Manufacturers
Alfa Laval
Sasakura
Nirex
Known Models (3)
Alfa Laval JWP-26-C80
26 t/day
· 1.5 kW
· Seawater → Freshwater
Common Failures:
- • Plate scaling from high seawater temp
- • Ejector nozzle wear
- • Salinity alarm
- • Vacuum loss
Service: Plate-type FWG; acid-clean plates when output drops; do not run in port.
Spares: Alfa Laval: Dichtungssatz an Bord vorhalten. Platten-Reinigungschemikalien bevorraten. Lead time: 2-6 Wochen.
Nirex NIRO-3
15 t/day
· 1.1 kW
· Seawater → Freshwater
Common Failures:
- • Evaporator plate fouling
- • Vacuum pump failure
- • Salinity sensor drift
Service: Smaller unit for auxiliary heat source; operates at 40-50 deg C JW temp.
Spares: Nirex: Dichtungssatz an Bord vorhalten. Platten-Reinigungschemikalien bevorraten. Lead time: 2-6 Wochen.
Sasakura VS-300
30 t/day
· 2.2 kW
· Seawater → Freshwater
Common Failures:
- • Scale buildup on evaporator tubes
- • Brine ejector failure
- • Distillate pump seal leak
Service: Flash-type evaporator; descale with citric acid at <35 ppm salinity.
Spares: Sasakura: Dichtungssatz an Bord vorhalten. Platten-Reinigungschemikalien bevorraten. Lead time: 2-6 Wochen.