• When sourcing water at great depths. HiTE has no trouble handling salty, sandy and/or oily feedwater
    Freshwater production for agricultural applications

    Discover the Horizontal inner Tube Evaporator from Wärtsilä

Horizontal inner Tube Evaporator (HiTE)

HiTE, horizontal inner Tube Evaporator (HiTE), a marine freshwater generator by Wärtsilä. High quality potable & technical water from seawater.

Wärtsilä’s Horizontal inner Tube Evaporator (HiTE) is a freshwater generator designed to produce fresh water in challenging environments. This evaporator has no trouble handling brackish, sandy and/or oily feedwater. The concentration of the brine can be controlled, reducing the to-be-disposed volume and keeping affiliated waste costs to a minimum.

  • Ideal for purifying brackish, sandy and/or oily feedwater
  • Robust design for agricultural and other heavy duty environments
  • For capacities of 30 to 250 tons/day

The HiTE guarantees irrigation water for the agricultural sector and serves in a wide range of operational areas where alternative technologies like reverse osmosis or plate technology reach their limits.

When sourcing water at great depths of over 300 meters the HiTE has no trouble handling brackish, sandy and/or oily feedwater


    • Efficient & reliable multi-effect distilling process 
    • Fully automatic system
    • Quick start-up and shut-down
    • Designed for continuous operation or shorter intervals
    • Flexible adaptation to demand and/or supply (down to 30%) thanks to part-load capability
    • Flexible use of external heat sources, such as biogas plants, solar, hot water, steam or combination
    • Concentration-volume ratio of brine can be controlled, reducing waste costs
    • Low operational cost - easy maintenance & long service intervals


    • Feedwater inlet temperature: 0 – 35°C
    • Capacity 30 – 250 tons/day
    • Water conductivity of distillate < 4μS/cm
    • Footprint: 5,4 – 24 m2
    • Weight empty: 2100 – 8100 kg
    • Heating water inlet temperature from 70 – 90°C
    • Specific thermal power consumption: 195 - 240 kWh/t
    • Electrical power consumption: 2.9 - 5.9 kWh 


    The HiTE freshwater generator consists of 3 film evaporators (connected in series) and one condenser (1). The feedwater is passing through the condenser. The major portion – after being used as cooling medium – is flowing back to the sea. A certain (minor) quantity is distributed in three parallel streams (2) directly into the evaporators. The 1st effect is heated by hot engine cooling water. Before evaporation can start, the feed water entering evaporator effect one is heated inside the tubes up to the boiling temperature.

    Internal process in the Horizontal Inner Tube Evaporator (HiTE) for non-marine applications

    The released vapours (3) are separated from the water/vapour mixture and are entering the 2nd and possible 3rd effects as heating medium. The procedure of condensation/evaporation is repeated in the 2nd and 3rd effect before the residual vapours produced in the 3rd effect are entering the condenser.

    The surplus brines are cascaded via syphon pipes from stage to stage, as well as the collected distillates. The distillate from the 3rd effect is flashing into the condenser hot well which also serves as distillate collecting tank. The distillate is pumped into the collecting tank. The brine is collected separately.


    Specific thermal power
    Electrical power*
    Dry weight
    Wet weight
    L x W x H
    HiTE 30-3302405,9210024151800x1500x20005,4
    HiTE 50-3502405,3350040252300x2000x20009,2
    HiTE 80-3802404,2510058652750x2000x200011,0
    HiTE 120-31202404,1650074753250x2000x200014,0
    HiTE 120-41201953.2720082803750x2000x200019,0
    HiTE 175-31752403,8750085504250x2300x220021,5
    HiTE 175-41751952,9810093154750x2300x220024,0

    * Electrical power consumption can vary depending on conditions

    Water conductivity of distillate for all models: < 4 μS/cm
    Feedwater inlet temperature: 0 – 35°C
    Heating water inlet temperature from 70 – 90°C


    Tandem ejector: without brine pump, but with higher electrical power
    Heating water source: for all qualities of water between 70 °C and 95 °C, steam or a combination of both
    Electrical control: PLC or manual control


    Delivered as standard  

    • Tube evaporator with condenser 
    • Distillate pump 
    • Ejector pump 
    • Feedwater pump
    • Chemical dosing tank with dosing instruments
    • Solenoid valve for draining lower quality distillate
    • Siemens S7 control panel 


    • Steam booster
    • Distillate cooler
    • Frequency converters for pumps
    • Cleaning stations

    How HiTE assures a reliable irrigation water supply

    How the HiTE from Wärtsilä is at the heart of freshwater production for farmers, making irrigation water

    After-sales support

    HiTEs are famous for their low operational cost. They are designed for easy maintenance and long service intervals. Each HiTE is fully supported throughout its lifecycle. Owners and operators can count on:

    All HiTE freshwater generators are commissioned by qualified commissioning engineers. Because of their excellent built quality the required maintenance is low. Any technician can do the job.

    Automation of Wärtsilä Waste and Wastewater treatment systems

    Contact us

    Wärtsilä Water & Waste
    Freshwater Generators

    • Leif Abildgaard, Sales Director, +45 2910 3777
    • Jan Patrick Reich, Sales Manager, +49 172 455 9691
    • waw.sales@wartsila.com

    Pankower Str. 16-18
    21502 Geesthacht