Pumping water into filtrations plants and reservoirs is not really an exciting topic, except when someone invents something that’s so simple that it seems that it should exist. A British inventor has created a pump that uses only wave power that is a self-cleaning device that essentially pumps water for free.
Dubbed ‘Searaser’, it consists of what looks like a navigation buoy, but is in fact a simple arrangement of ballast and floats connected by a piston. As a wave passes the device, the float is lifted, raising the piston and compressing water. The float sinks back down on the tail of the wave on to a second float, compressing water again on the downstroke.
What is particularly clever about Searaser, however, is its simplicity. Where most marine energy devices have sealed, lubricated innards and complex electronics, Searaser is lubricated entirely by seawater, has no electronic components and is even self-cleaning. Smith describes it as ‘Third-World mechanics’, but this belies the sophistication of the concept.
‘The beauty of it is that we’re only making a pump, and bringing water ashore,’ he explains. ‘All the other technology needed to generate the electricity already exists.’