Blue Energy Calculator
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Blue Energy Calculator

Use the slider bars to choose a salt concentration for feed stream 1, with a high salt concentration, and for feed stream 2, with a lower salt concentration. Use the third slider bar to define a feed flow rate between 0 and 500 m3/s and discover how much energy can be generated by reversal electro dialysis (RED) membrane technology.

Salt concentrate feed 1 (1 g/l)
Salt concentrate feed 2 (1 g/l)
Flow rate (0 m
blue energy calculator households


A 200 m3/s flow rate at the Afsluitdijk, where water of the North Sea with circa 30 g/l salt meets the IJsselmeer with circa 1 g/l salt, would typically generate around 200 MW. This is enough to serve approximately 200,000 households. The calculation is based on a energy recovery rate of 70% and a coincidence factor of 1 kWh per household

high salt feedstream concentrationBlue Energy, a Renewable Energy Source

Blue Energy is a promising renewable energy source for the future, producing electricity by harvesting the difference between salt water and fresh water. Blue Energy is an environmental alternative for energy. There is no emission of greenhouse gases and the feed streams are 24h per day available.

The 2 variables mentioned below are important for the energy recovery of the Blue Energy process:

low salt feedstream concentrationDifference in Salinity

In order to obtain energy, two feeds of different salt concentration must be available. Such a salinity pair might be formed from sea water or industrial brines, coupled with a low concentration source as for instance river water. The higher the delta in salinity, the more electric power can be generated. The salt concentrations are given in g/l.

blue energy water feedFlow Rate

The electrical power that can be generated, linearly depends on the feed flow rate. Doubling the flow rate will also double the electric power. The flow rate is given in m3/s.