Technology
Neo-Aerodynamic Ltd Company.
Turbine Goes Against the Flow
Hurricane effect: a lay-man understanding the principle of Neo-Aerodynamic.
The patent-pending, Neo-Aerodynamic turbine invented by Phi Tran harnesses torque from both kinetic and pneumatic energy of the fluid flow (wind or water). Since the 'lift' forces are caused by artificial flow of the fluid (air/wind) around the center of the turbine, the turbine's worst enemy -- turbulence -- is neutralized.
The efficiencies are high enough to make this turbine design economically competitive with fossil-fuel-generated electricity. It is able to function well in low wind areas, making it ideal for city/urban roof top and back yard settings, requiring no tower.
- "A $10-15,000 roof top or backyard device will produce enough electricity for one California family including heat for cooking and air conditioning."
The design is applicable to harness energy from any of the following resources: Wind, River, Creek, Ocean current, Tidal current and Wave.
Independent Testing
Tests are under guidance to report to Dr Ajit Thakker of the University of Limerick in Ireland and at least one other independent labs have tested the device with consistent results. Three more independent academic research projects are set up for the coming fall semester.
A researcher a Oxford University in Amsterdam said that the lift into the wind makes this design superior. Add to that the advantage of the vast surface area, which does not work much against the turbine on the leeward side due to the lift.
How it works
Fluid always goes from a hi- to a low-pressured place. In fluid aerodynamic; when something stands in its flow it then causes the flow facing front having higher pressure. Using airfoil in the path of the flow; its aerodynamic effect will cause a lift, like it works with an airplane.
Observations from introducing color streams of fluid to the device, analyzing the video clips.
On the wind facing (wind make) side; the flow are then redirect outward form the center. It then causes the “lift” on airfoils to push it turning. Once the device is turning it causes the center to have lower pressure; the outside air then rushes in to fill those vacuums. This flow is then redirected to cause “lift” on the airfoil. When turning; the special arrange of the airfoil allowing the volume of the air passing through the upper chamber are always more then of the lower chamber. This also causes the lift to make the device turn.
In short; Neo-Aerodynamic uses the artificial flow of the air to cause the lift on its airfoils. That's why it's called Neo-AeroDynamic.
In case of a horizontal axis propeller it's easy to
understand that its swept area is on the surface that is parallel to
the cross section of it axis. In this case it is the same as the wind
facing surface.
In case of a Neo-Aero-Dynamic device the swept area is the same area as the cross section of the airfoils sweep. It is the surface that's parallel to the cross section of it's axis. Therefore as of the wind, the swept area of a Neo-Aero-Dynamic device is on a horizontal plane. This concept is VERY IMPORTANT because we will use the swept area to calculate the output of a Neo-Aero-Dynamic device.
It’s also very important that the commonly understood “swept area” that we use to calculate the rated output of the horizontal propeller does not apply to this device because:
- There's no wind move through its airfoils.
- Turbulence and the attack angle of each airfoil changes at every moment.
- On each airfoil; the pressure posing on the upper chamber and the lower chamber are different and constantly changing.
As the result; known methods such as "Betz" limit become useless.
Everything we use to calculate the output has to come from actual
measurements on either wind tunnel test models or real life
installation.
Calculation of the output
Wind tunnel model tests and real life devices have proven:
- The output of the device is proportional to the square of the diameter of the rotor or proportional to it swept area. Please see the “Swept Area” above.
- The output of the device is proportional to the height of the device.
- The output of the device is proportional to the wind speed at it power 3 (V^3).
- O = a x D^2 x H x V^3, where:
- O is output; usually in Watts;
- D is diameter;
- H is height;
- V is fluid flow speed;
- a is a parameter representing the effectiveness of the device (higher when the diameter increases), plus the density of the fluid and the type of airfoil. As an example; in ocean level, the density of the wind: if D , H in U.S. feet, V in m/s, then a would be 0.0087 for device has diameter of 1 feet or less, above that and less then 2 feet it would be 0,01018. It becomes more then 0.02 for NACA series 7 and 6 feet diameter.
- When the Neo-AeroDynamic device is used as a turbine in a water stream; we expect the parameter to be 786 times the value as it is when functioning in the air (water is 786 times heavier then air).
Understanding the principle
A-Background in forming of an hurricane: Hurricane always start with a tropical disturbance when the sun hit the ocean the heat raises up forming a column of low pressure air then the air from the outside (higher pressure) rushing in at the same time the earth rotation, the gravity and the earth's surface cause these rushing airs ‘miss the target’ and forming a vortex, As long as the ocean is still warm, water is still vaporizing causing pressure high it is gaining the strength, otherwise the ocean is cool it's then neutralized.
B- While HAWT is using the opposite principle of a fan Neo-Aerodynamic implements the opposite principle of a hurricane. Upon turning, Neo-Aerodynamic redirects air mass outward from the center causing the lift upon the airfoils. In affect this move causes the center to have a column of low air pressure. By nature, the high pressure air will rush in to fill up that column.
C- Neo-Aerodynamic, is opaque (air does not go through). This causes a wall of high pressured air at its front (wind break side). While these airs are rushing in, the positions of the airfoils will redirect them ‘off target’ (an imitation of the rotation of the earth). This action also causes the lift upon the airfoil to make it turn. The process will repeat as long as it still blocking the wind causing a high pressured wall in front of it.