Solar Products for You and the Environment

By chrisgoh1 on October 4, 2008

There are many ways to put sunlight to practical use. A quick look at your nearest home improvement store will reveal a host of gizmos and gadgets that are powered by solar energy. Equipped and improved with the latest technology, nifty solar products are now more ingenious and useful – as they continue to inspire us to make the switch to solar.

  • Solar lights. Outdoor solar garden lights usher in a whole new revolution in lighting and landscaping. Aside from being environmentally friendly, the latest breed of solar lights are now more functional and aesthetically pleasing. Equipped with LED lights, these outdoor solar gadgets last longer and shine brighter. What’s also great about solar lights is that there is no need for wiring to connect to an energy source. Thus, they can be placed and moved around anywhere you want them to fit your lighting needs.
  • Solar water heaters. From the one-million gallon pool used in the 1996 Atlanta Olympics to virtually all homes in Israel, India and Greece, solar water heaters are all the rage. What is great about this technology is that manufacturers create different types of heaters to fit all needs, residential or commercial. Solar heaters can either act as the primary source of heat or as a back-up to the conventional electric heater. It’s about time you heat up your bath and swimming pool with solar heaters.
  • Solar cookers. Ranging from the simple and homemade to the modern and high-tech. Solar cookers are a useful and eco-friendly alternative to conventional cooking. Perhaps its greatest and most noble purpose yet is humanitarian. Widely used in African villages and refugee camps in Darfur, solar cookers have greatly improved the lives of many people. Women no longer have to leave the safety of their refugee camps to gather firewood and families can save on cooking fuel by going solar.
  • Solar cars. Though yet to be available to the general public, the government, scientists and economists recognize that the future of transportation could well be powered by solar cars. Though vehicles can be powered on solar energy alone, the cars of the future would most probably run on a hybrid of solar and traditional gasoline. Still, there is one thing we know for sure: our spending at the fuel pump will definitely be much lower.

So take the road less traveled and make the switch to solar. The key to saving the environment is available at a store near you.

Posted in | Tagged | Leave a response

Solar Power – A Beginners Guide

By chrisgoh1 on October 4, 2008

The sun is the greatest of source of energy in out small solar system, and as the fossil fuels we greedily consume gradually run out we need to consider alternative sources to fill the hole these dwindling resources are leaving. And one alternative that shows great potential is Solar Power. Since we discovered the science of photovoltaics, ingenious engineers and entrepreneurs have managed to turn the sun’s rays into usable energy to power all types of appliances, from water heaters, light bulbs, garden lights and even cars. Could solar energy be the answer to our global environmental problem and fuel shortage? We certainly hope so. Combined with other renewable alternative sources of energy, the use of solar power could just be our key to a brighter, less fossil fuel-reliant future.

Solar power is simply the utilization of the sun’s radiation into heat or electricity. And in recent years, the use of solar power as an alternative source of energy has become more popular than ever. With our increased care in the environment coupled with the rising prices and dwindling supply of fossil fuel, the industry behind solar power is growing faster than ever. Technology has also made the sun useful in more ways than we thought possible.

How does solar power work?

The process involved is quite simple. Solar energy works by converting the sun’s rays into heat using solar thermal collectors for heating water, and solar panels to supply power to the appliances in a home. With solar collectors, heat is captured from the sun in glass tubes, which then heat the water. With solar panels, radiation is retrieved and collected from the sun.
When the sun’s rays hit the solar panels, they are absorbed by semiconductors such as silicon (the material solar panels are typically made of.) The process causes electrons to be knocked off from their atoms, allowing them to flow through the material, thus generating electricity.

Solar power homes

If you are looking for a way to reduce your electricity bill while saving the world at the same time, powering your home with solar energy just might be the answer. A solar powered home is simply one that uses a photovoltaic solar power system to supply power to the home. Normally, the method involves placing the system on the roof facing the south to maximize the exposure to daylight. Most of the time, the total energy requirement of a home can be supplied using the photovoltaic structure though most owners prefer to supplement conventional electricity with solar power.

Solar powered homes hold several advantages. Not only do you help conserve the planet’s dwindling supply of fossil fuel and natural gas, your wallet also benefits from a reduction in energy costs. Despite the substantial initial investment, going solar will definitely give you the best deal for your dollars in the long run. This is something a kitchen remodeling or a plasma screen just won’t do.

Solar powered cars

With the restrictively high price of gasoline and the toxic emissions automobiles churn out into the atmosphere, even cars are going solar. Solar powered cars are not a thing of the future. In fact, they just might go mainstream in the next few years. So just how does a powerful car engine run on sunlight? Simple. A barrage of solar cells transform the sun’s heat and light directly into electrical energy which powers the car. Solar powered cars are often made with unbelievably curious shapes as designers want to lessen the drag factor, maximize full exposure to the sun, decrease the weight, while maintaining safety and function.

Government and automobile manufacturers have realized the potential of solar cars and hold races each year to create the best and fastest design. Usually entered by university students, racers and developers show-off their engineering and design skills by building and running their very own solar car.

Solar power kits

And now, wiring your house for solar power comes in a box. And all you need to do is purchase a solar panel kit. Everything you need to get started is right here: solar panels, pre-wired modules, a battery pack and the all-important instructions. Unleash the handyman in you and install your own solar panels without needing to hire expensive professionals and electricians. Though not quite made for beginners, a kit is great for the experienced do-it-yourselfers. Not only does powering your home with solar energy drastically reduce your household’s electricity bill, a solar kit becomes incredibly handy in the event of power failures.

Solar energy is free of charge and the supply is infinite. Our planet’s greatest heat source leaves much to be untapped. Whether you want to save some dollars or do something for the environment, now just might be the time to make the switch to solar.

Posted in | Tagged | Leave a response

What are Solar Cells?

By chrisgoh1 on October 4, 2008

A lot of calculators never use batteries, some wristwatches don’t need rewinding and the cars of the future will not have to pass by a fuel pump ever again. The answer? It lies in solar energy – and the tiny silicon atoms that make up a solar cell.

Thanks to the wonderful science of photovoltaics – the field of study related to the technology and application of solar cells to produce energy – many products can now be powered by the sun. And it all just starts with a solar cell, the basic device that you need to convert solar energy into usable electricity.

In theory, how solar cells work is really quite simple. Tiny particles called photons in sunlight are absorbed by the solar cell which is made from silicon (a semiconductor).

As sunlight hits the cell, the electrons inside the solar panels get ‘excited’ and start to move around, until they are knocked off from their atoms. They then flow through the silicon panel, creating electricity. The solar-generated energy can now be put to work – from lighting a bulb, heating a pool, cooling your house, or it can be stored in a battery for future use.

Now that you know the science and the principle behind the solar cells, perhaps you would like to give it a shot by making one in your very own home.

Using materials easily bought from the hardware store (i.e. a copper sheet and a simple micro-ammeter) and borrowing things from your very own kitchen (such as an electric stove and table salt), you can make your very own representation of a solar cell. However, do not plan on covering your entire roof with this homemade variety just yet. While it may be effective in illustrating the scientific concept of photovoltaics, it can probably power no more than a single light bulb.

Posted in | Tagged | Leave a response

Here Comes the Sun: Solar Energy at Work

By chrisgoh1 on October 4, 2008

On a hot day, a mother is drying her laundry on her backyard clothesline. Her son, a budding scientist, is holding a magnifying glass over blades of grass and watched them burn. Inside, her husband is balancing his checkbook using his trusty solar calculator. The mother checks her solar-powered wristwatch and heads back inside. It’s time.

Harnessing the Sun

Living with the sun is nothing new. Solar technology has been used by man for practical purposes since time immemorial. Legend has it that Greek soldiers used polished shields that reflect sunlight to blind their enemies. Romans have built the Pantheon around the sun, using daylighting techniques to provide natural interior illumination and to showcase the beauty of sunshine.

Global energy consumption drastically increased during the 19th century Industrial Revolution. The growth of factories necessitated the use of more powerful sources of energy such as wood and coal. Thus, energy sources rapidly transitioned from solar-based to fossil fuels. The oil embargo and energy crisis in recent decades led world leaders to rethink their energy policies and focus on developing alternative energy With the outpouring of environmental awareness, vast possibilities of solar power are once again being discovered and untapped.

Being able to utilize the sun to generate electricity is one of man’s greatest achievements. Though prehistoric man knew how to use bits of glass to reflect the sun’s rays to start a fire, the technology to directly turn sunlight into electricity is only a few decades old. Solar power is currently being used in agriculture, chemical and metal industries and in households. The use of evaporation ponds to get salt from sea water is one of its older applications. Single solar cells are used to power on calculators, wrist watches and highway signs. Solar water heaters heat swimming pools, greenhouses control the use of light to grow crops, solar distillation provides potable water to households, and solar energy provides the high temperature needed for metal smelting and chemical production.

How solar energy works

Solar energy – the energy from the sun in the form of heat or light – is being harnessed by technology that controls the use of the sun’s energy. Sunlight is converted into electricity by photovoltaics, a system which produces a reliable and non-polluting form of energy without using any fossil fuels.

Photovoltaic cells directly convert sunlight into electricity. Also known as solar panels, these cells are made up of the element silicon, the second most abundant material on earth. However, due to its difficulty to make, solar panels can still be quite expensive. To make the panels, silicon is heated to extremely high temperatures and chemicals such as boron and phosphorus are added. This makes the silicon atoms unstable so that when sunlight hits the solar panel, the modified silicon’s electrons are jarred, thus causing electricity to flow and provide electric power. When sunlight hits a solar panel, the electrons in the silicon start to move. This movement causes energy to flow through wires built inside the panels, producing electricity.

Pros and cons of solar energy

The biggest advantage of solar energy is that it is non-polluting. Unlike oil and fossil fuels, solar energy is a renewable resource. Solar cells are also easy to install and require very little maintenance. Although investing in solar panels can be a bit pricey at first, reduced electricity bills will definitely still save money in the long run. After all, the sun is ours for free.

The main disadvantage of solar energy is the restrictive financial cost of investment in solar panels. Installation also requires a large area, thus making solar power inefficient in places where space is expensive and limited. However, as newer technologies in solar energy develop, prices have dropped and more efficient styles are being produced. This is indeed very good news, as solar energy is increasingly becoming popular and available to many. Hopefully, this will encourage people to use solar energy for their electricity needs – not only because it is a hot, new trend but because it is right.


Posted in | Tagged | Leave a response

« Previous