Residential Wind Generator Power Ratings Missing the Point

With the push to go green much has been made of wind power. Media outlets attentive to the wind energy development have focused attention on the industry and many home owners have followed suit. The emergence of many upstart wind companies have advertisers scrambling to gain the attention of would be consumers in a relatively new market. To this point advertising has focused mostly on a maximum "output figure." This to a certain extent has confused consumers, many of which being new to wind energy. To further confuse matters most companies are purposefully inflating these figures in an apparent deliberate attempt to mislead consumers.

In our opinion the maximum output figures of a wind generator most people are focusing on does very little to describe the efficiency of a particular unit. That figure does little to relay a conceptual idea to the customer that is useful in making a decision on purchasing a wind generator. Maximum output figures of wind generators in many cases give a snapshot of an expected output at a give moment at the peak of a power curve. In reality a residential wind turbine in a particular area may not ever reach that output figure given or if it does it may do so rarely. If a wind generator reaches two thousand watts in 40 mph winds for instance that's is wonderful, however if it only started charging a system when the wind reached in excess of 20 mph that would make the unit useless in most area of the world for the majority of the time. Many wind generators do no reach desired "cut in points" until wind speeds reach 10-12 mph. Therefore, much of the time the turbines are producing no energy.

Consider the example of contrasting solar energy with wind power. With solar energy one of the downfalls is that the panels can only provide energy for about 4-8 hours per day depending on the location. It logically follows that the ability to produce power in a larger window of time makes wind power seem appealing. Wind maps show that a majority of the wind zones in the USA and the world for that matter fall within an area where wind is less than 10-12 mph on average. Considering the majority of wind turbine kits on the market do not produce any power to speak of in wind lower than 10 mph it logically follows that concentrating on producing power in lower wind zones has much merit and a product that produces power in winds of 5 mph is more useful in more areas.

In conclusion under the current advertising practices as described above if one consumer bought a wind turbine that was rated at one thousand watts and another buyer purchased a turbine that was advertised at 250 watts it is quite possible that the lower wattage turbine would output more power in a given period of time. Advertising the maximum charge that a wind generator can create is more deceptive and unrealistic than anything else. Many products advertised with high power output have very little power output in normal and light winds. Something needs to be done to regulate power ratings to place wind generator rating at an equal footing and stop rewarding deceptive advertisers. Depending on your area the novice wind generator consumer can benefit greatly by focusing on efficient wind generator designs that can deliver a steady charge over long periods of time in low winds. Anthony Wayne Jones

Magnalight.com Upgrades Solar Power Generator to support More LED Lights

Larson Electronics’ magnalight.com announced that it now offers the SPG366A-400 solar powered generator with two 400 watt milspec solar panels to feed the 366 amp hour capacity gel pack batteries. Equipped with a pneumatic telescoping mast and stabilizing lift jacks, the trailer style 760 pound solar powered generator replenishes the batteries at a rate of 24 amps per hour. Proven in 137 mile winds during Hurricane Ike and built to withstand armor piercing rounds, the SPG366A-400 can meet the needs of military, commercial and industrial users worldwide.

(Vocus) January 5, 2010 -- Larson Electronics’ magnalight.com announced that by adding two milspec solar panels to its SPG366A-400 solar powered generator, they could now offer lighting configurations of more than 50,000 lumens. Equipped with 8 of the Magnalight LED10W-9S 90 watt LED lights, the solar powered generator could, for example, effectively deliver 57,600 lumens of light for 12 hours and fully recharge the batteries with 16 hours of sunlight. The mobile solar powered generator can be connected to a vehicle via atrailer hitch and towed to remote locations. By calculating the number of hours of sunlight and accounting forcloud cover, dirt and other factors, operators can effectively assess the amount of lighting that makes the unit self-sustaining in remote areas.

“With LED lights like the LED10W-9S, operators can easily cover an area equivalent to several football fields with bright white light that delivers illumination exceeding that of high wattage metal halide light towers,” said Rob Bresnahan with magnalight.com. “We offer a wide range of low amp draw, high powered LED lights that can easily replicate traditional diesel generator driven light tower configurations when supported by our solar powered generator. Diesel generators need to be fueled and generate fumes and noise, which isn’t always useful for event oriented applications. Also, diesel generators usually produce high voltage, which presents some risks to inexperienced operators. Finally, diesel generators need to be refueled, which can present logistics issues. Solar power generators, like our SPG366A-400, are quiet, and when properly configured, can be completely self-sufficient. Obviously, the number of hours of sunlight is the critical factor. We can and do equip the unit with a hookup for conventional charging via wall outlets to augment the solar capabilities. This is effective for event lighting and other applications where diesel generators are not appropriate. But for remote area installations, operators need to size the lighting configuration to match the daylight replenishment. So there are some challenges there. “

Rob continued, “The area where we see a lot of opportunity is when the solar powered generator is used in combination with our explosion proof LED lights. There is a growing number of remote installations involving natural gas and other hazardous location storage areas that are looking for low voltage, self sufficient lighting. Our Class 1 Division 1 LED lights, combined with the solar powered generator, are a low maintenance, effective solution to this requirement.”

Larson Electronics’ magnalight.com offers a wide array of LED lights, explosion proof LED lights and other low amp draw lighting alternatives that are ideal for solar power generator configurations. High powered LED lights with low amp draws, operating on 9-32 volts DC can be ideal partners for solar powered, wind powered and other alternative energy generation. Please visit magnalight.com or contact 1-800-369-6671 (1-214-616-6180 international) to learn more.

The Latest on Solar Energy

Updated: Feb. 19, 2009

From magnifying glasses to steam engines, scientists through the centuries have found innovative ways to harness the power of the sun. Converting more solar power into electricity is high on the political agenda in many countries, amid the push to find domestic energy sources that are less polluting than fossil fuels.

Distribution

Despite rapid growth in recent years, solar power accounts for less than 1 percent of United States electricity use. Solar power is more entrenched in European countries such as Spain and Germany, which have promoted its development with strong incentives called feed-in tariffs,which require electric utilities to buy solar power at a high, fixed price. In the United States, California is by far the leading solar state.

How it Works

There are several ways to use the sun’s power to generate electricity. One of the most promising is called concentrating solar power. This involves using mirrors to reflect and focus the sun’s rays, providing heat, which in turn helps power a generator. Another is photovoltaic panels, such as the displays on the rooftops of homes and office buildings (some of these displays, especially in California, have recently experienced problems with theft).

Drawbacks and Incentives

The drawback to solar power is that it is expensive to produce: generating power from photovoltaic panels costs more than four times as much as coal, and more than twice what wind power costs. In the United States, the federal government and states have offered a variety of incentives to encourage homeowners and businesses to put panels on their roofs, and for utilities to buy power from large displays. Solar panels produce no energy at night, but that is not a significant problem because the electricity is often most needed in the daytime, when consumers turn on lights and televisions and air-conditioning.

Solar energy is also used to heat water and pools — and of course a properly designed house will optimize the light and heat qualities of as it floods through the windows.


How Do Air Vent Wind Turbines Work ?

Air Vent Wind Turbine Basics
1. These devices rotate to pull out hot air in warm months and moist air in cold months. They are commonly located in an attic, using only wind and pressure differences as their power source. Air vent wind turbines range in price from $25 to $55. They are advertised to offer energy savings and comfort with low up-front cost. They can be purchased at most hardware stores and online vendors and are commonly either 12 or 14 inches in diameter. The blades or vanes are shaped to allow for maximum wind catching ability, resulting in rotation at minimal winds speeds of 5mph or lower. Installation is generally done at high points on the roof of a building and is relatively simple with each device normally coming with instructions. They can be braced internally or externally depending on the kit purchased. Air Vent Inc. recommends two turbines for up to 1300 attic square feet, three for 1800 and four up to 2400 square feet. The effectiveness of these and other types of attic vents varies based on climate and specific roof/attic dimensions.

How Do They Work?
2. The concept behind wind turbine vents is that the turning blades will help force air out of the attic. Hot air naturally rises, so if attic air is heated above the ambient air temperature a vent will allow the less dense hot air to escape. Commercial uses of wind vent turbines often connect very large fans to the underside and are used to draw things such as smoke out of a building. A domestic venting turbine does not have this fan. A problem often cited with typical ridge vents is that they stop the rise of this hot air with the inverted V that sits on top of the vent.

Do They Work?
3. The effectiveness of wind turbine vents compared to other venting techniques is debatable. A 2002 study from the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE ) found that "enhanced ventilation (i.e., ridge vents,turbines or a power fan) in addition to soffit vents produced less than 3% reduction in daily cooling loads for test houses." The same study, referring to the effectiveness of venting in reducing cooling loads and moister states, "other strategies have been shown to have a stronger and more direct influence." While they do not discourage the use of venting in all situations, it should be used as part of an overall air flow strategy.

Massive Generator To Wind Through Greenville

Deputies: Slow-Moving Motorcade Will Cause Traffic Delays
POSTED: 4:02 pm EST November 19, 2009
UPDATED: 12:01 pm EST November 20, 2009
GREENVILLE, S.C. -- Greenville County deputies said that a massive power generator will slowly meander its way through Greenville County beginning Friday.
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The 880,000-pound generator is on its way to Duke Energy's Cliffside Steam Station in Boiling Springs, N.C.
Deputies said that the 1.5 million pound transporter that is carrying the power plant part travels at about 5 mph because of its size. They said that authorities will be escorting the transporter as it snakes its way through the county.
Officials said that the generator will enter the county at about noon on Friday near Princeton along Highway 25. It will travel up the highway and park near the intersection with Interstate 85 on Friday night. From there the transporter will wind its way through the west side of Greenville before parking just south of Highway 11 on Sunday night. The motorcade will continue to near the North Carolina state line on Tuesday morning.
Deputies said that motorists should try to avoid the rote that the massive piece of equipment will take as it will cause traffic delays where it travels.

Santee Cooper to look at use of wind turbine

BY TONY BARTELME
The Post and Courier
Saturday, November 14, 2009


As Santee Cooper explores the feasibility of building a wind farm off the Carolina coast, it's also looking at the viability of generating power from small wind turbines in Georgetown County, officials said Friday.

Crews plan to install an anemometer at the end of Georgetown Fishing Pier next week. Engineers will monitor winds for three to six months.

If the wind is sufficient, Santee Cooper could install a 2-kilowatt wind turbine there.

"We think these projects offer a great learning opportunity for students, and they will help us all learn about this important potential renewable energy resource," said Marc Tye, Santee Cooper's vice president of conservation and renewable energy.

Santee Cooper already has gathered data on wind speeds on land and found the wind isn't strong enough to generate enough power on a large scale.

Winds blow much harder off the coast, however, and earlier this year Santee Cooper and Coastal Carolina University stationed buoys at the south and north ends of the Grand Strand to measure wind speeds for a possible large-scale wind farm.

Turbines in offshore wind farms are capable of generating 1.5 megawatts of electricity, enough to power 750 homes. A 2-kilowatt generator, however, would be more suitable for a single home.

Santee Cooper also plans to test winds at Morgan Park.

Kline hires attorney for wind generator hearing

BY TOM RAGAN (STAFF WRITER)
Published: November 10, 2009


Kline Township hired an attorney to represent the township for a zoning hearing that will determine if the township will allow a proposed $1 million wind generator for the Van Hoekelen Greenhouses Inc. property.

Attorney Peter Fagan was hired on a 3-0 vote by township supervisors Monday to avoid a conflict of interest by zoning board solicitor Joseph Baranko, who also represents Van Hoekelen.

A&A Real Estate Associates and Van Hoekelen are co-named on the notice of application for the installation of a wind generator and equipment.

The next step in the process is getting the zoning board's approval for the plan. The Kline Township Planning Board and the board of supervisors have recommended each of its respective approvals for a special exception.

Van Hoekelen is looking at the wind generator as an alternative energy source, according to supervisors. The company pays an average of $22,000 for heating in colder months. Van Hoekelen began operating its business in 1988 in the McAdoo-Kline Township area. Van Hoekelen grows and distributes many types of plants and flowers to 48 states.

The zoning hearing board will determine a time and date on the matter.

Cogeneration project

Kline Township officials recently met with officials from SUEZ Energy North American Affiliate of Houston, Texas, to discuss energy alternatives for the cogeneration plant in the township.

"This was just a preliminary meeting," supervisor Carmen Cara explained.

The company is looking into solar heating panels that could cost an estimated $15 to $25 million. Supervisors stressed the project is in the discussion stage and any plan would have to go through a planning and zoning hearing before any permits or construction can be approved.

House leveled

Kline Township supervisors were pleased with a demolition job by resident Russell Postupack on a home at 34 Snyder Ave. in the McAdoo section of Kline Township.

The home has been a recent topic of discussion regarding complaints from neighbors about cats going in an out of the home and the associated stench from animal feces inside the home. Kline Township made several unsuccessful attempts to contact the homeowner before targeting it for demolition.

"Russell Postupack did a good job demolishing that house. He used three Dumpsters and the property looks good," Cara said.

Township solicitor Mark Semanchik asked the board of supervisors about placing a lien on the property for money owed to the township for inspection and maintenance of the property and associated demolition costs.

The township will try to re-coup some its money through a lien process.

The owner of the property, Aileen Kulpon, has moved out of the area and has been difficult to contact. A local bank, First Columbia, holds the mortgage on the property.

tragan@standardspeaker.com