Our unique constructed rectangular models and solutions are complement to existing technologies of membrane distillation that use waste heat.

The advantages:

  • rectangular high flux filter units
  • corrosion resistant heat exchanger units
  • compact constructions
  • low operation pressures (approximately 1 bar)
  • energy sources: sun, seawater, (industrial) waste heat
  • environmentally friendly

RN Solutions is continuously developing sustainable products. Our core business is to develop and deliver our innovative membrane distillation products.

We do not focus on delivering and implementation of a complete installation, however we can help with the design, construction and implementation with subcontractors and suppliers.

The need for clean water is one of the world's largest demands. In many countries the water production takes place at high costs, with use of chemicals and with little consideration of the environment.

We make it our mission to develop products that:

  • use highly available sources of energy: sun, seawater and (industrial) waste heat
  • need no chemicals to clean
  • are sustainable
  • inexpensive to produce
  • are environmentally friendly
  • consist of basic standard products from suppliers
  • can be custom-made

100%

With our unique innovative products we can filter for instance seawater or polluted water into water that can be applied for making drinking water. This can be done in large quantities against low energy costs.

RN Solutions uses membrane distillation technology. Our working principle is based on direct contact (DCMD).

Membrane distillation filtration

Cold water flows into the inlet of the rectangular unit passing the membrane distillation filter unit (MU). On the other inlet warm seawater enters the same unit. This creates a temperature difference across the membrane.

Due to laws of physics a balance will want to develop. Warm water wants to flow towards the colder water, but cannot pass the membrane. Only water vapor passes through the membrane and condensates on the cold side.

Heat exchanger

To continue this water production process, we create a constant temperature difference on both sides of the membrane by entering the distillate flow into our heat exchanger unit (HU).

Our heat exchanger unit consists of a foil in the middle. On one side of the foil we let cold seawater flow through the unit. On the other side the warm distillate passes through. Due to the temperature difference, the distillate releases its heat through the foil to the cold side of the unit increasing the temperature of the seawater.

Industrial waste heat

The distillate cools down and is reused in the membrane distillation unit. The warmed up seawater needs to be heated a little bit more to create the temperature difference in the filter unit. For instance, (industrial) waste heat (< 90° C) can be used for reheating the seawater to the required temperature.

Brine or concentrate

When this process takes place continuously, you will get a seasalt concentrate (brine) on the warm seawater side of the unit. This can be easily removed from the system and applied for other purposes.

High optimal energetic system

The ultimate goal of our high optimal energetic system is to produce water which can be used for making drinking water. To create this water, only a temperature difference is required of about 3° C. The higher the temperature difference, the higher the flux will be.

From theoretical principles to practical realities.

We have three kinds of product groups

  • membrane distillation filter units (MU)
  • heat exchanger units (HU)
  • hybrid units (MHU), liquid gap / air gap

Our products are suitable for a wide range of applications, such as drinking water, industry, agriculture, recreation and shipping.

Qualities of our products

  • high separation efficiency
  • low energy required
  • low pressure operation (max 1 bar)
  • easy process
  • no chemical additives
  • low fouling
  • simple to combine with various kinds of applications
  • compact layout
  • unique box model
  • corrosion resistant
  • low pressure operation (max 1 bar)
  • easy process
  • simple to combine with various kinds of applications
  • compact layout
  • unique box model
  • foil construction
  • heat transfer comparable with titanium heat exchangers
  • high separation efficiency
  • low energy required
  • low pressure operation (max 1 bar)
  • easy process
  • no chemical additives
  • low fouling
  • simple to combine with various kinds of applications
  • compact layout
  • unique box model
  • corrosion resistant
  • foil construction
  • heat transfer comparable with titanium heat exchangers

Solutions for a wide range of applications

Our products are suitable for a wide range of applications, such as:

Our products are made with sustainable materials and constructed with utmost care and precision.

If you have any issues or questions regarding our products, please contact us:
telephone: +31(0)6-20534852
or you can send an email: