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Jul20
TheGreenBuzz :: Solar Energy, The Future of Generating Energy For The Home
Filed under: Solar Green Energy Sources; Tagged as: advanced building materials, advanced urban planning, ancient chinese, conducting materials, conventional sources of energy, direction of the sun, energy requirements, green house, house designs, insulations, materials design, overhangs, relative position, residential houses, s rays, solar cell technology, solar cells, solar panels, sources of energy, thermal massNo CommentsSolar energy for residential houses is nothing new. It has just been relegated to the background in lieu of rising cost of real estate; newer more advanced building materials, design and the limitation of resources.
Since man started building homes, sunlight played a major influence in the design. In fact, even in the more advanced urban planning method of the Ancient Chinese and Greeks, the orientation of the buildings is as much as possible directed towards where it could capture the most sunlight.
The ancients might not be as intellectually sophisticated then to use catch phrases as passive solar and thermal mass but when they build, they were building in compact proportion, employing overhangs, producing insulations and building in manners that direct the airflow within the structure and producing well lit, well ventilated spaces using the relative position of the sun to the orientation of their structures.
Lately, as the conventional sources of energy became more expensive, homeowners were once again turning to the sun for energy requirements.
Since the 1950’s, harnessing the sun’s rays has been developing and today the solar cell technology has achieved very efficient levels that modern (so-called green house) designs apply the sun’s power to provide energy for the home.
While solar energy is free, the device that will convert it to run our appliances is not. To provide solar energy for the home, solar cells called photovoltaic made from semi-conducting materials, are grouped into modules. These solar panels are mounted on rooftops, yards or open spaces where it can capture the maximum amount of sunlight.
Whenever possible, the panels will be installed facing south to get the most out of the sunlight but tracking systems are also used to follow the direction of the sun. The solar panels collect the energy from the sunlight. The process basically is that when the panels are exposed to sunlight, the electrons are separated form the atoms. This movement of the electrons creates electricity.
To store power, pumps are often used - circulating water in the cells. The water goes into a storage tank where the power is stored, ready for use. Sometimes, the use of gravity is employed if it will just the same store the heated water in to the tank.
In spite of all the development in solar energy though, the use of this technology is not enough to provide power to the whole house. The best method so far can only fulfill about 80% of a households power needs. The employment of solar energy for the home will still require the use of the conventional power distribution method.
Powering the homes by solar means will still, for a while be augmented by a local power distribution agency. To many, this is already a good starting point. Homeowners that feel that the high cost of powering their houses through solar power, is justified when compared to the price that is now being paid for conventional electrification method where horrendous amounts of CO2 are being dumped into the atmosphere just to generate a pitiful amount of electricity.
However, due in part to the rising costs of energy, the technology for solar energy has been undergoing rapid phases of development. Experts are confident that within five years, powering the home through the solar method will be made widely available for those who prefer it as its sole energy source.
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Jul16
TheGreenBuzz :: Pros and Cons Of Residential Solar Energy System
Filed under: Solar Green Energy Sources; Tagged as: alternative forms of energy, alternative sources of energy, byproducts, forms of energy, fossil fuel power, fossil fuel power plants, greenhouse gases, growing concern, nitrogen oxide, photovoltaic cells, power of the sun, Pros and Cons Of Residential Solar Energy System, residential solar energy, s ray, s rays, solar energy system, solar panels, solar radiation, solar technology, sources of energy, use of solar energyNo CommentsHarnessing the power of the sun’s ray to create energy to power our house is very appealing. But the question is, “Is everything about solar energy good?”
Looking at the current price of fossil fuel-based electricity, it is quite impractical to convert into solar energy system. However, with the growing concern on the state of the earth, there is really a need to find other means of energy aside from what power plants are using right now. Where do you place yourself?
Whether you are an advocate of clean energy or simply care about where your finances go, looking at the pros and cons of residential solar energy system will help you decide on whether to convert or not.
Pros
Solar energy is free. Did you know that the earth absorbs 174 pettawatts of solar radiation? This means that we have more than enough source of free energy to power every house in the world. Unfortunately, most of our energy is still drawn from oil, gas and coal. But in recent years, there is a steady increase of demand for alternative and renewable energy like solar power. It is estimated that the demand for alternative sources of energy will increase by 53% between 1999 and 2020.
Smart home owners for the year 2009 are taking advantage of the renewable energy plan for solar and wind power.
#1) Goverment Money Paid Back.
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#3) Home Owner No Longer Needs Pays Eletrcial Company.
#4) Only One Website Showing How To Do Everthing Right Going Green, http://www.smart-home-owners-going-green.milehightopsites.comSolar energy is clean, renewable and sustainable. Because the energy created from the sun’s rays does not produce byproducts like those from fossil fuel power plants (sulfur dioxide, nitrogen oxide, mercury or carbon dioxide), it does not contribute to pollution. Accordingly, the increase in the use of solar energy and other alternative forms of energy will decrease the demand for greenhouse gases-producing power plants.
The price of photovoltaic cells is steadily decreasing. The demand for solar panels has risen by 57% in the United States in 2007 and is steadily increasing on a monthly basis. The increase in demand results to the improvement of solar technology as a whole. The prices of photovoltaic cells have declined on the average of 4% every year over the past 15 years.
Solar panels can be installed on most rooftops, eliminating the problem of finding a suitable place for installation. Solar panels require little or no maintenance. The original photovoltaic cells technology is used for most satellites orbiting our earth today which are not maintained at all. Many solar panel manufacturers give 25 to 40 years warranty on their products.
Because most areas of the country receive a substantial amount of sunlight throughout the year, solar panels can be installed anywhere.
Many states in the country give tax credits and rebates to households who want to install solar energy system. Check with your state government the cost of these incentives.
Cons
While the prices of PV cells are in constant decline, the cost of installation is substantially high compared to the current electric cost. But the good thing is, after your initial cash out, you don’t have to pay every month on electric bills for the rest of your life.
On areas cities and areas with heavy pollution problem, solar energy may not work as fine. Weather can also affect the efficiency of solar energy. If it is raining, overcast weather or if there is a hurricane, the solar panels’ efficiency is decreased.
You are only producing energy during day time.
These are general pros and cons you might encounter when considering the conversion to solar energy system.
We will show all you need to know on solar and wind power based on location, cost, budget, rebates, goverment tax credits and practicality visit, http://www.smart-home-owners-going-green.milehightopsites.com
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May6
TheGreenBuzz :: The History Of Wind Generated Power
Filed under: Wind Power Energy Solutions; Tagged as: aermotor, alternative sources of energy, animal skin, dc generator, electricity, first windmill, fossil fuels, gearbox, great source, kilowatt, market trend, megawatts, northern europe, oil prices, sailboat, sources of energy, using electricity, water windmills, wind generator, wind power, wind powered, wind turbine, wind turbines, windmill, windmill technology, windmillsNo Comments
With the increased costs of energy derived from fossil fuels, many consumers are interested in alternative sources of energy. Unfortunately the market trend tells us that little to no relief in oil prices is in sight. A great source of power can be harnessed from the wind using electricity generating windmills. Below is a brief history of wind power, and how it came to be.
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Wind power has been harnessed for many, many years. Nobody knows for sure when man started using the wind’s power to grind flour or pump water, but it is thought that the first windmill appeared in the Persian region. From there this windmill technology spread back to northern Europe. Windmills crafted by the Dutch were used primarily to pump water.
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Windmills were definitely not the first structures to harness the wind. This award belongs to the sailboat. More than likely, founded in small scale (small canoe with an animal skin as a sail) the sailboat became the only way to cross large areas of water. The sailboat evolved into large ships moving great distances by using only wind as a source of power.
Windmills on a smaller scale showed up in America in the mid 19th Century. The Aermotor and Dempster design were invented and many are still in use. From 1850 to 1970 more than 6,000,000 windmills were installed in the United States. The main application was pumping water for livestock and providing farm homes with a water supply.
In the late 19th Century, the first windmill to generate electricity was born! This was the Brush postmill in Cleveland Ohio, and the year was 1888! The rotor was approximately 17 meters in diameter. This windmill had a gearbox with a high spin ratio attached to a DC generator.
By the middle 1920’s, several small scale systems were found across the Midwestern plains and used to supply farms with electricity. These systems generally had a 1 to 3 kilowatt output.
1941 saw the largest wind generator to date. This generator’s capacity was 1.25 megawatts. It was known as the Smith-Putnam machine. The rotor measured an astonishing 175 feet in diameter.
Today, many wind turbines are in operation from small scale residential systems that are affordable to the homeowner to large scale wind turbine farms that are used to supply a large amount of electricity to utility customers.
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