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 have the product (Intellectual Property worldwide), the operational team and the process from starting materials to marketing ready.

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.1 in 10 people lack access to clean water. This has to change.We believe that everyone in the world should have access to clean drinking water. Our mission is to make this happen.

How? By producing our unique products. With our knowledge of filter and process technologies and with our own R&D skills we want to scale up our company to make clean drinking water accessible to everyone.

The water solution for the world

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 Air or Liquid Gap Membrane Distillation (AGMD) and Direct Contact Membrane Distillation (DCMD).

Air or Liquid Gap Membrane Distillation (AGMD)

Membrane distillation filtration

Cold sea water flows into the inlet of the Membrane Hybrid Unit (MHU) passing the heat exchanger channel. On the other inlet warm seawater enters the same unit passing the membrane channel. In the MHU an almost counter-current flow process and a high recovery of evaporation heat is possible.

In Air Gap Membrane Distillation (AGMD), water vapour is condensed on a cold surface that has been separated from the membrane through an air gap. The heat losses are reduced in this configuration by addition of a stagnant air gap between membrane and condensation surface.

The warm distillate cools down due to preheating the seawater. AGMD is high energy efficient and suitable for heat recovery.

Heat exchanger Industrial waste heat (HU-01)

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.

Direct Contact Membrane Distillation (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.

Air Gap Membrane Distillation (AGMD)

Direct Contact Membrane Distillation (DCMD)

We have three kinds of product groups, each with an effective surface area of 25 - 100 m²:

  • 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: