The Bay of Fundy, (40‘ high), which is the site of the highest tide in the world, is shaped like a horn, which was developed by helical waves over millions of years. It is the same shape found at Anchorage, Alaska (27′ high), because they were created by the same energy of helical waves. The wave of this system causes the water to increase its speed as it is deflected at each turn. The narrowest point of the Inlet at Anchorage, Alaska has mid-channel speeds up to six knots with an average of 3.8 knots that produce amazing tidal power.
The installation of most of very low head sites is technically feasible, but civil works give rise to high costs, resulting to economically enviable projects. To solve this problem, one must design a new machine using a completely different philosophy to equip such sites: the small hydro power system.
The study of current turbines reveals that they were all invented on the basis of a poor understanding of hydrodynamics, and a consequent false premise.
The new damless development of a submerged helical pathway is capable of extracting high energy from low head sites at very low cost because of a physics phenomenon, called repulsion energy, which speeds up the current at the extremity of the curves. This is an exciting breakthrough in green energy; it is modular, relatively easy to install and highly scalable.
The secret is in the natural motion of the water, which is a vortex. Water reduces resistance by curving more and more inwards thereby avoiding the confrontational resistance of straight motion. Nature has no use for the straight line: think of the water that leaves your bathtub; give it a twirl and see what happens.
The threshold velocity required to energize a turbine in fast water is 3.1 m/sec. The vast majority of river/ocean currents in the Canada and United States are slower than 3 m/sec. The HUG taps into a vast new source of clean and renewable energy of water currents as slow as 2 m/sec. previously off limits to conventional turbine technology. Even if the flow is less than 2 m/sec, the HUG introduces the Energy Body to make a difference.