The National Science Fair

Photovoltaic Solar Energy

The photovoltaic solar energy is the main variety of the system used to generate usable solar energy. Understand the basic system is becoming a source of alternative energy converted into a component common and necessary in everyday life. Implement the use of photovoltaic solar energy in human society is an important part of the strategies of many Governments to move away from sustainable energy practices and to the existence of a sustainable environment. Photovoltaic systems are capable of collecting sunlight and convert it into energy. Implement energy in vehicles for human transport is nowadays a priority for all scientists.

To create solar energy, a photovoltaic cell or PV is necessary. The photovoltaic cell has an area loaded with extra electrons, and a second surface that has atoms with positive charge. When light strikes a photovoltaic cell and is absorbed, the excess electrons are excited, bouncing on the surface of positive charge and creating an electrical current. This power is solar energy that can now be used as energy. The photovoltaic cells can be arranged together to create energy sources for different sizes. Small arrays, called modules, can be used in electronics to provide power in the same way that makes it a battery. Large groups of photovoltaic cells can be used for the construction of solar panels capable of generating huge amounts of photovoltaic solar energy. Depending on the size of the array and the amount of sunlight, solar energy systems can generate enough energy to power houses, factories, or even contribute to a large extent with the energy needs of an urban area.

Many scientists believe that the photovoltaic solar energy is vital for human survival. Today, much of the world depends on the energy that comes from fossil fuels such as petroleum and coal. These fuels are made from the decay of organisms and can take millions of years to create it, human beings have abused the resources available so that many fossil fuels are running out. Some experts suggest that fossil fuel reserves will start running by the middle of the 21st century, and that it is likely to disappear completely in a few centuries. In order to keep intact society, science has to discover how to create energy that does not come from fossil fuels. Since solar power is a renewable resource, it is a vital area of scientific research and development at the dawn of the 21st century. Some suggest that the construction of a huge photovoltaic solar energy in a sunny desert plant could generate enough energy for everyone, although this bring some problems. While a plant is large enough without a doubt could generate enough energy, but transport all over the world is a much more complicated matter. The Sun’s energy can vary from a overnight. For Yes same, photovoltaic solar energy may not be capable of solving the world’s energy problems, but in combination with other renewable energy sources such as solar wind, algae biofuels, hydropower and geothermal energy, the days of a world without fossil fuels will come very soon.