Wednesday, December 30, 2009

Home Solar Power


There are currently many reasons why a home solar power system can be an important addition to any household.

If you are interested in helping the environment, and the fight against climate change, then you may already be considering the installation of a renewable energy system to your home.

The main advantage of installing a home solar energy system is mainly down to the significant boost you will receive to your electricity supply.

This means your electricity bills will be reduced quite significantly, while the cost of initial installation of a solar energy system will pay itself off over time.

So how can you harness the solar energy in a way that is best suited to your needs? Well you can use solar power panels connected to your home in a number of different ways.

Tuesday, December 29, 2009

"Why Solar Power and Solar Panels Important"


Importance of Solar Panels

We have ways to heat our water, our homes and provide us with electricity. We probably take all of this for granted and if we lost them we would probably panic. We take for granted that these conveniences will be there for us from now on. We expect glitches to happen but we want them to be fixable without going long without all of these. We appreciate the heat in the winter when it snows outside and when the temperatures drop. We need water to live and although it is usually running under the ground we want the convenience of it running through our pipes and into our homes.

Some people use some of the heat generated from the sun in order to heat homes, power electricity and provide water to their families and businesses. When you think about all that you have that runs through a machine it may be possible to reroute that in order to run it all by sunlight. Scientists have only started to make this possible but it is far from being completed. When you consider all the solar energy that reaches the earth's surface and then radiated back into the atmosphere, you could power electricity, heat and water from now on. This solar energy can be redirected and concentrated using special boxes that attract the light during the day to heat water and homes throughout the night.

Solar panels can be different shapes and sizes but their main purpose is to convert the light in order to make electricity. Photovoltaic, or PV, is the process of converting the light into electricity. Photovoltaic cells are self generating and consist of a very thing film made of silver. This film is placed on a semiconductor layer that can be found on an iron substrate. The photovoltaic cells are very important in producing enough sunlight and heat in order to successfully produce the energy that is needed in order to heat up water, heat homes and power electricity.

Monday, December 14, 2009

solar panels Gardening


Gardening is an American pastime, and interest in it is growing rapidly. People are recognizing how much nice plants and landscaping will help the appearance of their home. It also is an enjoyable hobby to cultivate plants from seed to maturity in your own backyard garden. Adding decorative touches like stepping stones, fountains, or solar garden lighting can show your personal style.

With solar lighting in your garden, you can light a path, or highlight certain plants or features. The best part about it is that it does not need any external power. No chords or anything at all. Just like your plants, it will use the sun's energy to power itself.

A solar garden light is made up of a plastic shell with a solar cell inside. It also has a nickel and cadmium battery, a control board, an LED light source, and a photo resistor.

The sun charges the battery, which powers the solar cell. The control board and the light itself is powered by these. At night, the battery can't charge since the sunlight is gone, so the photo resistor turns on the LED. The LED can run for about 15 hours on a charged battery.

Outdoor electrical wiring can be a hassle to install, especially if your garden is not right next to your home. The solar lighting can easily fix that. It will cost more at first to install the solar lighting, but the money that will be saved in electric bills will more than make up for it.

You can chose the style, shape, and color of the lighting based upon your personal taste and the style of the rest of your garden. Plastic dome lighting is common, for example. This type is used most often for pathways or borders. There are spikes on the bottom so you can simply stick the lights into the ground.

Other shapes that are available include tubes, discs, lanterns, tiki torches, and globes. Besides putting them in the ground, you can mount some on your home or deck, or hang them on poles, etc. The number of options is amazing.

Light can add a really special quality to your garden, especially if you use the area to entertain friends and family in the evenings.

In addition to working well and looking great, landscape solar garden lights are good for the environment and your electricity bill. The lights are a great investment that will last.

Friday, December 4, 2009

Solar vehicles



Development of a solar powered car has been an engineering goal since the 1980s. The World Solar Challenge is a biannual solar-powered car race, where teams from universities and enterprises compete over 3,021 kilometres (1,877 mi) across central Australia from Darwin to Adelaide. In 1987, when it was founded, the winner's average speed was 67 kilometres per hour (42 mph) and by 2007 the winner's average speed had improved to 90.87 kilometres per hour (56.46 mph).[81] The North American Solar Challenge and the planned South African Solar Challenge are comparable competitions that reflect an international interest in the engineering and development of solar powered vehicles.[82][83]

Some vehicles use solar panels for auxiliary power, such as for air conditioning, to keep the interior cool, thus reducing fuel consumption.[84][85]

In 1975, the first practical solar boat was constructed in England.[86] By 1995, passenger boats incorporating PV panels began appearing and are now used extensively.[87] In 1996, Kenichi Horie made the first solar powered crossing of the Pacific Ocean, and the sun21 catamaran made the first solar powered crossing of the Atlantic Ocean in the winter of 2006–2007.[88] There are plans to circumnavigate the globe in 2010.[89]


Helios UAV in solar powered flight.In 1974, the unmanned AstroFlight Sunrise plane made the first solar flight. On 29 April 1979, the Solar Riser made the first flight in a solar powered, fully controlled, man carrying flying machine, reaching an altitude of 40 feet (12 m). In 1980, the Gossamer Penguin made the first piloted flights powered solely by photovoltaics. This was quickly followed by the Solar Challenger which crossed the English Channel in July 1981. In 1990 Eric Raymond in 21 hops flew from California to North Carolina using solar power.[90] Developments then turned back to unmanned aerial vehicles (UAV) with the Pathfinder (1997) and subsequent designs, culminating in the Helios which set the altitude record for a non-rocket-propelled aircraft at 29,524 metres (96,860 ft) in 2001.[91] The Zephyr, developed by BAE Systems, is the latest in a line of record-breaking solar aircraft, making a 54-hour flight in 2007, and month-long flights are envisioned by 2010.[92]

A solar balloon is a black balloon that is filled with ordinary air. As sunlight shines on the balloon, the air inside is heated and expands causing an upward buoyancy force, much like an artificially heated hot air balloon. Some solar balloons are large enough for human flight, but usage is generally limited to the toy market as the surface-area to payload-weight ratio is relatively high.[93]

Solar sails are a proposed form of spacecraft propulsion using large membrane mirrors to exploit radiation pressure from the Sun. Unlike rockets, solar sails require no fuel. Although the thrust is small compared to rockets, it continues as long as the Sun shines onto the deployed sail and in the vacuum of space significant speeds can eventually be achieved.[94]

The High-altitude airship (HAA) is an unmanned, long-duration, lighter-than-air vehicle using helium gas for lift, and thin-film solar cells for power. The United States Department of Defense Missile Defense Agency has contracted Lockheed Martin to construct it to enhance the Ballistic Missile Defense System (BMDS).[95] Airships have some advantages for solar-powered flight: they do not require power to remain aloft, and an airship's envelope presents a large area to the Sun.

Information about Solar Energy


Information about Solar Energy

Solar energy, radiant light and heat from the Sun, has been harnessed by humans since ancient times using a range of ever-evolving technologies. Solar radiation, along with secondary solar-powered resources such as wind and wave power, hydroelectricity and biomass, account for most of the available renewable energy on Earth. Only a minuscule fraction of the available solar energy is used.

Solar powered electrical generation relies on heat engines and photovoltaics. Solar energy's uses are limited only by human ingenuity. A partial list of solar applications includes space heating and cooling through solar architecture, potable water via distillation and disinfection, daylighting, solar hot water, solar cooking, and high temperature process heat for industrial purposes.To harvest the solar energy, the most common way is to use solar panels

Solar technologies are broadly characterized as either passive solar or active solar depending on the way they capture, convert and distribute solar energy. Active solar techniques include the use of photovoltaic panels and solar thermal collectors to harness the energy. Passive solar techniques include orienting a building to the Sun, selecting materials with favorable thermal mass or light dispersing properties, and designing spaces that naturally circulate air.