Vertical spiral wind turbines, as well as other types of vertical axis wind turbine (VAWT) becomes very popular nowadays, but they are not for your home, and here's why…
Firstly, several definitions, so that we can agree that we are talking about:
Shaft rotor windside revolves perpendicular to the Earth's surface. Rotor horizontal shaft wind turbine rotates along the Earth's surface.
Vertical nicknamed "eggbeaters" due to the way they look and horizontal turbines resemble classic windmill.
Horizontal and vertical wind turbines are similar in the following ways:
1. Same basic components: System blade, generator, controller, and transmission.
2. it may be too noisy.
That's where the similarity ends.
Here are the advantages and disadvantages of a vertical wind turbine for your home, so you can decide for yourself:
The advantages of vertical systems are:
1. Vertical handle turbulent flow better than horizontal turbines.
2. Vertical are usually closer to the ground, so they are easier and cheaper to access when problems arise.
3. they are indifferent to the direction of the wind-they don't have to "find" wind from the tail
4. safer for birds and bats.
Disadvantages of vertical mills are:
1. Cost a lot more.
2. Vertical work with very high torque, so it's hard to get in a low wind vanes.
3 stresses put on them by the wind, they tend to act in a much bigger than with the horizontal axis.
4. efficiency ratings are lower than with verticals, horizontals.
More in-depth discussions on:
For small turbines for home use vertical axis wind turbines simply isn't efficient for both the horizontal axis of the system.
There are 3 main factors contributing to the inefficiency of vertical mill:
1. the lack of aerodynamic orders to turn the rotors savonius "-style.
2. Injury inflicting the stress put on the shaft and bearings of high torque.
3. vertical axis windmills tend to be placed closer to the ground or on roofs, where the air is more turbulent. They are not at higher altitude, which provides a steady, consistent wind, energy-rich.
More about the first factor-there are 2 main categories: design a vertical system
1. Savonious rotors, which visually resemble a 55-gallon barrel in a sense, cut in half. Savonius rotor systems are very inefficiently (5-10% efficiency) because they are not referring to the aid of aerodynamic surfaces. Most of the new vertical rotor Savonius type systems are.
2. Darrieus rotors, which look like eggbeater. These systems can address the effectiveness of systems for the horizontal axis, because their blades are designed with the aerodynamic properties (they create lift). (Horizontal systems can theoretically up to 59% efficiency) In this type of vertical spiral wind turbine and can demonstrate the effectiveness of the range of 30%.
With respect to the second factor affecting efficiency of stresses due to vertical systems and wear and tear. Vertical wind turbines sold to consumers that they may be on the roof or very low to the ground, thereby eliminating the overhead of the tower. Low altitude affects efficiency in two ways:
1 Wind, which is close to Earth and causes a turbulent stop/start the unit and frequent changes in direction of rotation. This causes the mechanical wear on the bearings at the top and bottom of the rotor shaft of the turbine, reduction in service life.
2 way compensate Producers added wear and tear is beef up materials in the construction of the turbines. This of course makes turbines more expensive.
And finally the third factor: Wind near the ground is chaotic and turbulent due to interference from buildings and trees. That turbulent environment isn't anywhere nearly as efficient as the turbine, which is higher up above the tree line is valid. That's where the majority of all wind-above, where there are no obstacles to slow it down or cause it to divert around objects and change of direction.
If the vertical axis wind turbines not produce electricity efficiently, why are they so popular?
I believe there are two good reasons:
1. they are more aesthetically appealing than the horizontal axis of the device. Recent studies in Europe have shown that they are even slightly hypnotic effect due to "frequency". They really like watching the waves on the beach at the human psyche. They shift and change direction as the contours of the tail. They just spin. Thus, we would like to watch them do their job.
2. the myth that they can operate close to the ground. Theoretically we think if we could deploy army from these devices across the roof, we could solve the energy crisis.
They are simply put together and get running, and they are not typically installed on the tower. This makes them attractive for those who want to participate in Wind and renewable energy sources, but not the hassle of large project feasibility study for optimization of wind, pouring foundations for wind Tower and operating costs associated with large home energy systems.
The bottom line is vertical spiral wind turbines and other vertical axis Wind systems for homes just isn't ready for prime time yet.
If your goal is to create a lot of electrical energy for your home at a price that will allow faster than windmill payback vertical are out. Only good choice now is to buy or build a tried and true horizontal axis.
However, if your goal is to get started quickly and start making some electrical energy from wind, and you're not going to obsess over numbers, vertical spiral vertical axis turbines will make you feel good that you participate in the creation of renewable energies and the adoption of certain measures.
We can only hope that vertical spiral wind turbine manufacturers will continue to refine their designs and overcome these prohibitions. If this happens, and they get a lot cheaper, the promise of "a wind turbine on each roof can be a reality some day.
Roger Brown saved countless companies money into their account. Check out Roger's tips on how to save money with the wind and get free energy
0 comments:
Post a Comment