Posts Tagged ‘Wind Turbines’

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The Basics of Wind Power: How Wind Turbines Generate Power

Thursday, October 13th, 2011

In the world of wind power,
one finds two types of wind turbines: horizontal axis and vertical axis
turbines. In horizontal axis wind turbines (HAWT’s), the rotor shaft sits
horizontally. Architects must set HAWT’s facing the wind in order to generate
energy.

With vertical axis wind turbines (VAWT’s), the main rotor
shaft is positioned vertically and doesn’t have to be facing the wind. The VAWT,
however, produces minimal rotational velocity and stronger torque, thus making these
varieties of turbines much less efficient than their horizontal opponents.

HAWT’s, conversely, will produce much more power. In
2008, utility providers in the U.S. owned land-anchored HAWT’s with an average
capacity of 1.67 megawatts (MW), while offshore turbines can range anywhere from
3.5 to 5 MW in capacity.

Wind turbines generate power in just about three simple stages.
To start, the wind pushes the rotor blades, the large part of the turbines that
spin. Generally, the higher the blades are positioned in the sky, the greater the subsequent
energy because winds speed increases as you move higher into the atmosphere.

Inserted into the center of the blades is the turbine shaft,
which rotates as the blades transfer the rotational mechanical energy to the shaft. Often,
numerous gears and additional shafts will accompany the main shaft to increase
its rotations per minute, which, subsequently, greatens its electrical creation.

At the end of the shaft rests the electrical generator. Wind
turbines most often use electromagnetic induction to transform the mechanical
energy into electric voltage. A person may consider voltage as electrical pressure,
which moves electricity from point A to point B.

Inside the generator, the shaft joins a number of
magnets that surround a conductor, say, a wire coil. The shaft revolves the
magnets around the coil, which generates voltage in the conductor. Finally, the
voltage transfers the existing electrical current to a mechanism or power plant
that stores and parcels out the electricity.

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Wind Run Turbines, The Positive Aspects And Disadvantages

Thursday, September 1st, 2011

In the event you haven’t heard of wind turbine electricity generators, here is a brief description. The standard design resembles a tiny windmill on a toll structure. When the wind blows the wind turbine the blades make the rotor rotate and the movement of the rotor causes the generator within the turbine crank out power. As with almost all types of power generators, magnets and also copper wires are organized to create a charge whenever the rotor spins. It is a fairly easy technique.

There must be sufficient wind to turn the blades for these power generators to make electricity. Wind is much more powerful higher up in the sky, that is definitely why wind turbines are rather tall, at close to 30 meters. The main objective of getting more of the wind power is to generate more electricity utilizing the turbines. All of this does not matter if there’s no wind in the first place. Historical weather information is carefully analyzed to choose sites that will deliver sufficient continuous winds for the turbines. Many coastal places are ideal thanks to reliable high winds. Consistent winds does not always mean that they always blow from the same exact direction. A time tested model, adapted from the original wind powered water pumps, utilizes a tall fin to point the propeller into the wind, regardless of the direction it comes from.

Because of their efficient design, turbines can create a lot of power that can be implemented for domestic or industrial applications. A battery backup that’s replenished by the turbines, provides power during occasions when no wind blows. While they can produce a lot of electricity, these are not cheap at all and getting back your original investment on one can take many years. Unlike various other green energy methods, wind turbines will always work 24/7, providing that there is wind. Wind turbines can certainly produce as much electricity at night as during the day, reducing the battery storage specifications in some cases. With so much worry about pollution nowadays, turbines are a great option because they are so clean. This implies that wind turbines do not contribute towards the effects of global warming simply because there are no fuels actually burned and no emissions being released into the atmosphere. The energy source is additionally renewable, just like solar energy, as there is always wind blowing. Hence there is always likely to be energy created by the turbines.

Let’s consider what some may illustrate as the cons of wind turbine made electricity. Their size makes them stand out, and some people say they’re unsightly for this reason. When clustered in groups, such as the huge commercial installations in coastal districts and even out at sea, exactly where there are high winds, they are not really an attractive site. Like any mechanical system that moves, they might be quite loud. While excellent for meeting the needs of people, they can be unsafe to birds and bats. Bats particularly are susceptible, simply because their sonar system is disrupted by the rapid motion in the air. There are no statistics on how frequently this happens, nevertheless.

Thinking about the benefits and drawbacks of wind turbines, they have a lot going in their favor. With proper planning they can be very useful and effective.

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Are Wind Turbines Good Or Perhaps Unsafe?

Sunday, May 29th, 2011

Perhaps you are already acquainted with some of the available information regarding green living. But what is useful for you will hinge on a few variables. As always, you may have to branch out and search in places you had not thought about, yet. Yes, it can be frustrating when you think you have all you need, but you really do not. Assembling the big picture for any subject is often not simple or fast with online research. Well, we have done our exploration into wind turbines, and we believe it will be of good use for you.

Nearly everybody is aware of what a wind turbine is and the way in which they produce energy, but for those whom don’t know I will explain. If you imagine a plane propeller resting atop a tall tower, this is precisely what a turbine looks like. Electricity is made by the generator, housed inside the turbine casing, whenever the rotor is turned by the wind. As with many types of power generators, magnets and also copper wires are organized to create a charge whenever the rotor spins. There’s almost nothing complicated about this type of generator.

Naturally for the turbine to operate there needs to be wind. The average height for wind turbines is actually 30 meters, which enables them to utilize the more powerful winds that occur at that height. The purpose of getting more of the wind power is to create more electricity with the turbines. All of this does not matter if there was no wind in the first place. Historical weather information is carefully analyzed to pick sites that will provide sufficient continuous winds for the turbines. One excellent location is in coastal zones because there are typically consistent wind patterns in these locales. Consistent winds does not mean that they consistently blow from the same exact direction. Nevertheless the design is extremely clever and they are built so that the rotor turns in the direction of the wind, enabling them to catch the wind from any direction.

Because of their economical design, turbines can produce a lot of power that can be implemented for domestic or conventional applications. When there’s no wind, a battery backup set up is used to fulfill electrical needs. One issue is the number of years needed for the installation charges to be recovered in power savings. A positive feature of these turbines, in contrast to solar panels, is they do not call for sunlight. Wind turbines can certainly produce as much electricity at night as during the day, reducing the battery storage requirements in some cases. Turbines are incredibly clean to run, removing fears about pollution. This means that wind turbines do not contribute to the effects of global warming due to the fact there are no fuels actually burned and no emissions being released into the atmosphere. The energy source is also renewable, just like solar energy, because there is always wind blowing. This indicates that turbines will usually be able to produce power if they are located in high wind locations.

As with nearly anything there are some drawbacks of using wind turbines for energy. They’re definitely not a pretty sight, especially because they’re so large. Large installations, with a good deal, or even hundreds grouped together, generate visual pollution in coastal areas, as reported by critics. Noise pollution is yet another complaint due to the friction of the rotor on the shaft when it spins. Wildlife aficionados complain that birds and bats are damaged by them. The reason stated for bats traveling into wind turbines is that the motion in the air disrupts their capability to hear and see with sonar. While these reports are rarely documented they do occur.

Wind turbines definitely seem to be a excellent source of energy, but obviously there are downsides like with anything. Wind turbines offer remarkable promise for generating clean, sustainable and safe energy, with few serious downsides.

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Another Alternative Energy: Wind Power

Saturday, February 19th, 2011

Although it is much less expensive to initially get hooked into the local electric company’s grid than it is to set up and hook into wind turbines, in the long run one saves money by utilizing the wind for one’s energy needs—while also becoming more independent. Not receiving an electric bill while enjoying the advantages of the modern electrically-driven lifestyle is a wondrous feeling.

Electric bills and fuel bills are rising steadily—but the cost of wind turbine energy is zero, and the cost of installing and hooking up a turbine is steadily coming down as demand rises and more commercial success is realized by various companies producing the turbines and researching technologies to make them ever more efficient. In addition, people are moving away from the traditional electric grids and the fossil fuels for personal reasons including desire for greater independence, the desire to live remotely or rurally without having to “go primitive”, political concerns such as fears of terrorist strikes on oil fields or power grids, or concerns about the environment. Again, this motivation to get away from the traditional energy sources is the same one that causes people to seek the power of the wind for their energy, giving more business opportunities to profit from wind turbine production and maintenance, which drives their costs down for the consumers. In nearly thirty states at the time of this writing, homeowners who remain on the grid but who still choose to use wind energy (or other alternative forms) are eligible for rebates or tax breaks from the state governments that end up paying for as much as 50% of their total “green” energy systems’ costs. In addition, there are 35 states at the time of this writing where these homeowners are allowed to sell their excess energy back to the power company under what are called “net metering laws”. The rates that they are being paid by the local power companies for this energy are standard retail rates—in other words, the homeowners are actually profiting from their own energy production.

Some federal lawmakers are pushing to get the federal government to mandate these tax breaks and other wind power incentives in all 50 states. Japan and Germany already have national incentive programs in place. However, “A lot of this is handled regionally by state law. There wouldn’t really be a role for the federal government,” the Energy Department’s Craig Stevens says. And as might be imagined, there are power companies who feel that it’s unfair that they should have to pay retail rates to private individuals. “We should [only have to] pay you the wholesale rate for … your electricity,” according to Bruce Bowen, Pacific Gas & Electric’s director of regulatory policy. However, the companies seem to be more worried about losing short term profits than about the benefits, especially in the long run, of the increased use of wind turbines or wind farms. Head of the Center for Energy Efficiency and Renewable Technologies of California V. John White points out, “It’s quality power that strengthens the grid.”

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Do-It-Yourself Environmentally Friendly Generator

Sunday, October 17th, 2010

When you decide to install environmentally friendly generators for your home, whether it be solar power systems, home wind turbines, solar hot water heater or any combination of the three, you’re going to increase the value of your home and cut your energy costs by up to 50%, while reducing greenhouse gases and your dependence on fossil fuels. The sun transmits more energy to the earth’s surface in one hour than humans use in an entire year, but at present we don’t make the most of this free and abundant resource.

If you’re concerned about the potential for high costs when it comes to installing these systems, here’s some good news. First of all, if you’re just a little bit handy, you can save literally thousands of dollars by installing these equipment yourself. There are many excellent do-it-yourself guides on the market today, and they contain easy to understand step-by-step instructions. In addition, there are numerous state and federal tax incentives available now. In fact, as of January 2009, the cap on federal tax credits was removed and environmentally friendly generators are as affordable as they have ever been.

Granted, not every home in America is going to match up with all of the necessary guidelines to justify a solar and/or wind power system. For example, the average number of sunny days and the average wind speed in any given area will play an important role in your decision. However, if your research proves the move to alternative energy is a wise one in your case, then you may want to build it.

With the advent of new technology, thousands of environmentally friendly generators are now in use throughout the world, including full off-the-grid homes, weekend cabins and remote settlement communities. The RV and boating industry has taken full advantage of solar energy to bypass the need for utility hook-ups or unreliable generators while traveling. You may not know it, however wireless home solar power systems are utilized to enhance cellular phone signals around the world.

When you take a look at the big picture; great new technology, excellent do-it-yourself installation guides, energy cost savings, personal freedom, outstanding state and federal tax breaks and the fact that your helping to reduce greenhouse gases and the need for fossil fuels, there hasn’t been a better time in our history to take a look at installing an environmentally friendly generator for your home.

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