**Revolutionizing Coastal Energy: The UniWave 200**
Deployed off the coast of King Island in Tasmania, Australia, is an innovative piece of technology that has been designed to harness the power of waves and convert it into electricity. Wave Swell Energy's UniWave 200 is a cutting-edge solution that has been years in the making, and its potential applications are vast. We spoke with Tom Dennis, Co-Founder and Executive Chair of Wave Swell Energy, to learn more about this groundbreaking technology.
**Inspiration from Nature**
The UniWave 200's design is inspired by a natural phenomenon - the blowhole. "We have an artificial version of that," explains Tom Dennis. "It's a sort of neater chamber when the waves enter from the large underwater opening at the front, they cause the water level inside that chamber to rise and we have a small opening that air passes through very quickly." This air flow causes a turbine to spin, generating electricity.
**Oscillating Water Column Technology**
The UniWave 200 is part of an oscillating water column technology, which has been around for decades but never quite reached commercial viability. "Normally, in the past, as the wave rose inside the chamber, it pushed the air one way and as it fell, it sucked it back the other," explains Tom Dennis. "We only have air coming in one direction, and that's shown in tests to produce more power than any previous bi-directional oscillating water column."
**Addressing Three Key Challenges**
One of the major challenges facing wave energy technology has been efficiency - is it producing enough energy to make it worthwhile? The UniWave 200 addresses this challenge by capturing all the energy in the wave, from the surface to the sea bed. This improves conversion efficiency dramatically. Another challenge has been durability - can it withstand the pounding of the ocean?
The UniWave 200's design solves this problem by being closer to shore and using a big chunk of concrete with no moving parts whatsoever in the water. "Survivability is really not an issue because in shallow water, for a start, any big waves will break before they get to the structure," explains Tom Dennis.
**Accessibility and Maintenance**
The UniWave 200's design also addresses accessibility - how easy is it for a crew to fix if something breaks? The technology itself is quite efficient, but being closer to shore makes maintenance work very easy. "All our moving parts are above the water line, so it's very easy for any maintenance or operational work to be done," says Tom Dennis.
**Potential Applications Beyond Energy**
The UniWave 200 could also prove useful in other areas beyond energy production. For example, it could be used as a tool for water desalination and hydrogen production, as it already has the essential components needed for both. However, according to Tom Dennis, what he sees as the greatest immediate potential for this technology comes from its usefulness as a form of coastal protection from erosion.
**The Maldives Example**
The Maldives in the Indian Ocean is an example of where the UniWave 200 could be used to great effect. With sea level rise and more frequent extreme storm events, those islands are in danger of eventually going under. Building a new sea wall or breakwater would be costly, but using the UniWave 200 technology to do the same job would not only protect the coast but also generate green electricity.
**Marine Life Impact**
One final question from our conversation was about how the UniWave 200 affects marine life. Tom Dennis reassures us that there are no moving parts in the water, so there's no harm to marine life. In fact, some marine life view the units as artificial reefs. "We do have to monitor the noise levels at some distance from the unit itself," he admits, but adds that it's a noise coming from above in the atmosphere, not the ocean.
**The Future of Wave Energy**
As we await the UniWave 200's commercial debut, Tom Dennis is optimistic about its potential. "Where we're starting at the cost of our energy as we enter the commercial phase with this technology, that starting cost is well below the corresponding starting cost of other technologies including wind and solar," he explains.
In conclusion, the UniWave 200 represents a major breakthrough in wave energy technology. With its efficiency, durability, accessibility, and potential applications beyond energy production, it has the potential to revolutionize coastal energy and beyond.