What is hydro kinetic energy?

Hydro kinetic energy is the energy harvested from a moving body of water such as rivers, tides and ocean currents. It is a powerful, highly concentrated, clean green untapped energy resource.

Here are some facts...

  • • 70% of the earth is covered by water.
  • • Hydro kinetic energy is the largest renewable energy resource on the Planet.
  • • Rivers, tides and ocean currents are predictable.
  • • There is enough raw energy in the Gulf Stream to power the entire Planet.
  • • We do not use it for energy production.

Here is a video of the earth's ocean currents

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Here are some images of the earth's ocean currents

Naruto Uzus Strait Japan
Naruto Uzus Strait Japan
Kuroshio Current
Kuroshio Current
Atlantic Ocean Gulf Stream
Atlantic Ocean Gulf Stream
African Aghulas Curren
African Aghulas Curren

Did you know...?

A 4 knot water current – or about as fast as casual walking speed has more energy then a 30 foot rise and fall of tide, or an 8 knot tidal current has more energy than a 380 km per hour wind

Rivers are an excellent source of hydro kinetic energy. Brazil has over 50,000 rivers, Chile has more fjords then Norway, The Indonesian archipelago has ocean currents that flow like rivers from the Pacific Ocean into the Indian Ocean 24/7.The Mediterranean has numerous islands with fast moving flows. In the Bosporus water flows have been renown since ancient times. In Europe Rivers are flowing at 105% - 125% capacity due to the effect of global warming. Most countries around the globe have fast moving water in rivers, the entrance to bays and in straits between islands and the mainland where ocean currents are concentrated. All these sites are have huge potential to power a world hungry for energy.


Considerable confusion exists regarding the differing tidal energy technology designs that are generically referred to as “tidal power” or “tidal energy”. Below are the three main types of tidal energy turbines.
Shrouded Turbines
Figure 1
Image of a shrouded turbine - CGI
Barrage Systems
Figure 2
Image of a barrage system
Open Turbines
Figure 3
Image of an open turbines - CGI
The shrouded turbine system above researched, developed and Patented by Tidal Energy Pty Ltd in Queensland Australia, can use tidal river or ocean currents - accelerating the water across the turbine using a unique hydro dynamic shroud. The shroud allows the turbine to achieve at least 3 times the power output over the same turbine without the shroud. Shrouded systems are eco benign and combined with low installed cost can operate in slow or fast flow thresholds over a wide variety of sites. The Barrage System resembles a dam and is sometimes called a tidal fence. It captures the rise and fall of tides with turbines installed in the dam wall. The Rance River concept in France has operated since 1976. These systems have few viable sites worldwide. There are a number of barrages that have been proposed – Severn River in the UK and Derby in Western Australia - but all suffer from the dual problems of high installation costs, environmental issues and disruption to transport. The open or free flow turbine system resembles an under water windmill. Similar systems have been used since Roman times. Open or free flow turbines need fast moving water to be commercially viable. The open turbine system above shows an open turbine deployed in the UK. Compared to barrage systems open free flow systems are less costly and have little if any impact on the environment. However open free flow turbines systems require very fast flowing sites with very large turbines to be commercially viable.

As existing solar and wind systems are deployed the search for greater potential energy resources continues. Leading the field is hydro-kinetic energy due to the advantages of a far greater energy density, the predictability of rivers tides and ocean currents, minimal impact on the visual amenity - hydro kinetic turbines are submerged out of sight - higher rate of return on capital investment.

While water energy has been harvested since Roman times, and un- shrouded turbines have been installed in ocean currents, the core turbine technology for harvesting hydro kinetic energy is largely unchanged.

In 1998 an Australian company began research into shrouded turbine eventually achieving the highest efficiency - 60% - ever achieved from a hydro kinetic turbine with just one rotor.

The Tidal Energy Pty Ltd turbine named after it's inventors Davidson and Hill has been patented around the world. The Davidson-Hill Turbine Technology uses a shroud to concentrate the flow across the turbine allowing the turbine to harvest 3 times more energy then would be possible without the shroud.

Three open free-flow turbines side by side. CGI
A DHV turbine

The unique design allows the DHV Turbine to be scaled to suit most sites.

Turbines from 1.5 meters in diameter to 10 meters in diameter can be manufactured and flat packed for shipping to almost any location for assembly and installation.

Shows the size comparison between a man, a 2.25 square metre turbine and a 100 square metre turbine
Davidson-Hill Venturi Turbine dismantled
Davidson-Hill Venturi Turbine assembled
Davidson-Hill Venturi Turbine assembled and mounted on a flatbed trailer

For more information about the most advanced hydro kinetic turbine system in the world today give us a call.

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