high speeds. However, issues include noise, efficiency loss from neck oscillating movement and various maintenance related issues.
Furthermore, the so-called cut-in (power on) wind speed is high at 4 to 5m/s, they need to cut-out to prevent risks of over-spin in strong winds and a high cost of ownership from maintenance and management costs and the cost of the equipment.
Generally, resistance wind turbines are limited to use of between ten and twenty percent of the energy in wind.
With a tip-speed ratio of under 1, these are quiet and generate large torque with good ability to start in even small amounts of wind. This model enables collection of wind from any direction without shaft oscillation.
Able to begin rotation on their own with high tip-speed ratio once rotation starts, these turbines have high rotating torque and have garnered a lot of attention.
With an extremely low starting torque, it is unable to start rotating on its own and requires many innovations such as a starting motor or borrowing force from other turbines.
Since the cylindrical shape allows obtaining wind power from any direction, it may be installed without consideration of wind direction.
It can also be used to generate power in small locations.
Tornado wind turbines are the world’s first turbines to bring together the characteristics of Sarvonius wind turbines which excel at silent operation and gyro-mill wind turbines with their excellent rotation torque.
With excellent visibility, this design prevents accidents with birds better than conventional models (such as the common propeller type wind turbines).
There are lightning rods on each of the three pillars of the triangular casing grounding inductive lightning strikes by each rod vertically minimizing damage.
The design of these lightning measures, the greatest threat to wind power generation, thoroughly minimizes risks of loss of the blades which are mounted with two shafts to the triangular case, even in the unfortunate case of direct lightning strike.
Propeller power generation broken by lightning strike
The design prevents damage including bending of pillars and even blades during high winds with the robust triangular frame.
The gyro effect of blades rotating in both directions increases the stability of the casing the faster they are spinning.
Instead of depending on mechanical force, the laws of nature are used to limit the impact characterizing this design as extremely durable to natural forces.
Propeller power generation broken by gusts and typhoon strength winds
Since there is no pitch control or yaw movement, there are fewer parts making the design have fewer malfunctions than propeller wind turbines.
Since it uses no power when still and there is no cut out, it is able to limit power generation costs.
As a drag type with low rotation and high torque, the rotation speed is not too high so it can be safely upscaled easily.
The mechanism is simple so it is possible to achieve upscaling with the same existing construction method while retaining low maintenance and malfunctions even when made large.
With very low cut out, the tornado power turbine generating efficiency is able to generate during strong winds and allows a high operating rate compared to the worse performing propeller type. (In regions with strong winds, the annual power generation may vary greatly) Since this design can generate power through strong winds with lots of energy, ideal operation rates can be achieved.
Since wind is supported from all directions (360°), it is possible to supply a consistent amount of power generation.