Blue Energy Wind Tower

Blue Energy Vertical Axis Wind Tower

BEST Vertical Axis Wind Tower is an invention which can overcome many problems in existing vertical wind energy designs.

Designing a better vertical axis wind turbine

Since 2014, Blue Energy Science Technology has been developing a vertical axis wind tower in order to make wind energy accessible in urban environment. Following are the reasons to design such a vertical axis wind tower.

Due to patent application, real design 3D presentation is replaced with a cylindrical model. We will update the design detail when it is available.

Efficiency

There is a very important efficiency issue in between Horizontal Axis Wind Tower (HAWT) and Vertical Axis Wind Tower (VAWT). For horizontal axis, all the blades create unique torque which is a combined force to turn the electrical generator in one direction. For all the vertical axis turbine designs in the market, the torque is the result of a bigger torque force overcoming the smaller torque force, which is less efficient than the VAVT configuration. This is because in these VAWT products, half of the sweep area will work against the other half, makes the overall efficiency in general less than 1/3 it should be.

But one advantage for HAWT is the potential of going higher with modular structure. For example, you can make a simple HAWT module of 2 meter in diameter and 10 meter high. By adding 10 modules, you will a VAWT of 100 meters high. This is impossible to achieve by HAWT.

Land use:

When you have a land space at your title, the sky is the limit. So you can build a high rise wind tower at your backyard or in the front yard, which has to have the permission of bureaucratic departments such as local council and legal entity, and of course your neighbor. You might keep on add more modules to raise its height in order to tap into more energy daily. It is a long term investment at your pace and affordability. To build a high rise wind tower will allow you access higher altitude where wind energy is more stable and strong because the friction on land will have less drag on wind energy

Transmission of wind energy:

To build a wind tower in urban environment will cost less due the distance to energy users is much less than the normal wind farms. To make it a permanent building feature of an urban/rural household will offset energy cost in the long run. The challenge is to have such wind energy harvesting instrument less disruption to residents in many aspects such as visual, acoustic and safety to resident and wildlife. Conventional wind tower with turbine blades will not pass such requirement. Using high rise wind tower like BEWiT will easily overcome these challenge.

Energy storage:

Wind farms in some case cause electricity network being unstable due to energy source - wind, is an intermittent energy. If excessive wind energy can't be absorbed by the electricity grid, wind energy will be "dumped" by the wind farm operators. 

Energy storage is an essential mechanism for wind energy business to stay profitable. To have multiple energy storage solutions in an energy hub will eliminate such a problem. With BETE, to store energy as compressed air(CA) on site for long term energy storage. At high pressure, CA is far more superior than hot water and battery because CA will not subject to energy dissipation like heat pump or battery. Its energy density is also reasonably. For example, at room temperature, without the heat pump, a 200 liters CA container will have 2KWh of energy at 200 bars. With heat pump storage of 40 liters capacity, when its water temperature is about 100 degrees, the energy will be nearly triple.

But the best and superior way to store energy is in fact to use CO2 and Hydrogen to create methane, which is well known as Sabatier reaction. This solution would be the best way to sequestrate CO2 emission and energy storage for intermittent energy such as wind.

I am strongly against large scale energy storage using battery. Large or small scale is a relative term against its energy users. Battery is environmentally harmful and most importantly the energy density by battery is simply pathetically low. Using battery is slow in storing energy (battery charging) and very costly. For example, a pilot battery bank project in China cost half billion dollars. The battery bank only has capacity to store 15 minuets of electricity.

Mass production:

With vertical shaft and modular design, assembling a tall and large wind tower is easy. Most importantly the efficiency to harvest wind energy will be doubled because this design will not have bias caused by wind energy drag. It is also elegant, low noise. It will prevent any chance that birds can be injured. 

Below are the features make BEWiT standing out against any other wind energy technologies.

  • It is a vertical shaft wind tower without the Bias caused by wind drag
  • Owner can add multiple modules into higher altitude to access more wind energy. It is possible to build a tower hundred of meters high.
  • It has ultra low noise, even in gale.
  • There is no chance of injury to bird lives.
  • The energy storage solution can be backed up by BETE.
  • It can work along with BETE in a sunny and windless condition, with heat exchange solution to create internal thermal expansion effect.
  • It can be deploy in high populated area.
  • It can be built into monster size, or into miniature backyard size

BEST vertical axis wind tower

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