Wave Powered Saltwater Desalination Pilot Project Taking Off From Cape Verde

Wave 20 is an off grid saltwater desalination plant powered by the kinetic energy of aquatic waves.  Their pilot project will launch off the coast of west Africa as part of the EUs overall Blue Growth Strategy.

By harnessing the previously untapped reservoir of potential locked away inside of the ocean tide wave 2.0  could supply a significant amount of affordable Freshwater to those who need it most. So far the  European Union has prepared for their pilot project by conducting bathymetric surveys and various other assessments on the site, waves and water quality itself.

“We secured a pledge from the local power and water utility to purchase a full-scale Wave2O plant after trials of a pilot-scale plant have been successfully completed.”  Frederick Warne and co founder of the s m e resolute marina Ltd Olivia subero said

The wave 20 is composed of two wave energy converters, two large 20 ft containers as well as  housing equipment for producing electricity and another for producing Freshwater. In order for those wave energy converters to produce and store energy you must run a flexible hose between them and each container so that pressurized water can flow back and forth

“Process seawater is sourced from an offshore well away from any sources of contamination through a multi-stage filtration system before entering a manifold system that splits its flow into two different paths,” explains Ceberio.

In order to sustain enough pressure, wave induced mechanical energy powers wave energy Converters to drive electricity through two rotary actuators that maintain water pressure at 7000 kPa before being pumped ashore. A pneumatic accumulator then stabilizes undesired Pulsations in pressure before they reach the R/O system.

By sending a second stream of seawater through an energy recovery unit that can harvest electricity from the resulting high pressure Brine wave 20 can take even advantage of waste products to produce more energy. This is what allows the salt water desalination device to maintain a high enough energy efficiency conversion rate for off-grid operations.

Ideally you’d want to construct a dasalinator like this off the coast of a dry and barren desert landscape that still has access to the ocean –  which would of course allow you to produce drinkable fresh water where you couldn’t before, thus expanding our range of habitable conditions.



Wave power for clean drinking water

Cover Photo: Example of similar system from Australia

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