Question

Write the advantages and disadvantages of vawt

Answer 1

Answer:

The advantages and disadvantages are as follows

Explanation:

Advantages:

1. They can produce electricity in any wind direction.

2. Easy installation as compared to other wind turbine.

3. Low maintenance cost.

4. They can be installed in urban areas.

Disadvantages:

1. They need a initial push to start, this action use few of its own produce electricity.

2. They create noise pollution.

3. They have relative high vibration because the air flow near the ground creates turbulent flow.

4. Because of vibration bearing wear increase which result in the increase of maintenance cost.

Answer 2

Answer:

VAWT Advantages

These turbines have fewer parts than those that orient the rotary mechanism and blades horizontally. That means fewer components to wear out and break down. Also, the supporting strength of the tower doesn’t need to be as much, because the gearbox and generator are near the ground. Parts for controlling pitch and yaw aren’t needed either.

The turbine doesn’t have to be facing the right wind direction either. In a vertical system, air flowing from any direction or speed can rotate the blades. Therefore, the system can be used to generate power in gusty winds and when they’re blowing steadily.

Other benefits include:

Safety for workers: Maintenance workers do not have to climb as high to reach parts of the tower. Not only are VAWTs shorter. They also have major components closer to the ground. Maintaining generators, gearboxes, and most of the mechanical and electrical parts of the structure do not require scaling the tower because these aren’t mounted on top. Lifting equipment and climbing gear aren’t needed eithe: The design can be scaled down to small sizes, even as small as what will fit on an urban rooftop. In cities, there may not be room for all renewable energy technologies, but vertical turbines provide a viable alternative to hydrocarbon energy sources.

In addition, VAWTs are:

Cheaper to produce than horizontal axis turbines.

More easily installed compared to other wind turbine types.

Transportable from one location to another.

Equipped with low-speed blades, lessening the risk to people and birds.

Function in extreme weather, with variable winds and even mountain conditions.

Permissible where taller structures are prohibited.

Quieter to operate, so they don’t disturb people in residential neighborhoods.

According to the Institution of Mechanical Engineers, vertical axis wind turbines are more suited for being installed in denser arrays. Up to 10 times shorter than horizontal models, they can be clustered into arrays that even create turbulence from one turbine to another, which helps increase the flow around them. Therefore, wind speeds up around each one, increasing the power-generated. A low center of gravity also makes these models more stable for floating in offshore installations.

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Disadvantages of VAWTs

Not all of the blades produce torque at the same time, which limits the efficiency of vertical systems in producing energy. Other blades are simply pushed along. There is also more drag on the blades when they rotate. Although a turbine can work in gusty winds, that is not always the case; the low starting torque and dynamic stability problems can limit functionality in conditions the turbine wasn’t specifically designed for.

Since the wind turbines are lower to the ground, they do not harness the higher wind speeds often found at higher levels. If installers prefer to erect the structure on a tower, these are more difficult to install in such a way. However, it is more practical to install a vertical system on a level base, such as the ground or the top of a building.

Vibration can be an issue at times, and even increase the noise produced by the turbine. Air flow at ground level can increase turbulence, thereby increasing vibration. This can wear out the bearing. At times, this can result in more maintenance and therefore more costs associated with it. In earlier models, blades were prone to bending and cracking, causing the turbine to fail. Small units atop buildings or other structures may be subject to jostling forces, which add lateral stress that warrants ongoing maintenance and the use of stronger, more sturdy materials.

To Go Vertical or Not

While they produce less energy than horizontal turbines, vertical axis wind turbines still produce power and can be a better option depending on the application. They’re more suitable where space is limited and come with fewer challenges and risks to maintain.