Benefits of solar energy
Speaking of solar energy, first of all, it should be mentioned that it is a renewable energy source, in contrast to fossil fuels – coal, oil, gas, which are not renewable. According to NASA for another 6.5 billion years, the inhabitants of the Earth have nothing to worry about – this is approximately how long the Sun will warm our planet with its rays until it explodes.
The potential of solar energy is huge – the Earth’s surface is irradiated with 120 thousand terawatts of sunlight, which is 20 thousand times higher than the global demand for it.
Moreover, solar energy is inexhaustible and constant – it can not spend too much in the process of meeting the needs of mankind in energy carriers, so there will be plenty of it and for part of future generations.
Among the other advantages of solar energy, it is available in every part of the world – not only in the equatorial zone of the Earth, but also in the northern latitudes. Let’s say that Germany currently ranks first in the world in the use of solar energy and has its maximum potential.
5. Environmental friendliness
In light of recent trends in the fight for the Earth’s ecological purity, solar energy is the most promising industry, which partially replaces energy obtained from non-renewable fuel sources and, consequently, acts as a fundamental step towards protecting the climate from global warming. The production, transportation, installation and use of solar power plants are practically not associated with harmful emissions into the atmosphere. Even if they are present to an insignificant degree, compared to traditional energy sources, this is almost zero impact on the environment.
The idea of creating this project did not come to me by chance. My uncle recently visited Israel, where people everywhere use solar energy for household needs (lighting, home heating, water, etc.) I was very interested in this topic and decided to learn more about it and tried to create a model of an illuminated house with a solar panel (or solar module).
Solar battery – a household term used in colloquial speech or non-scientific press. Usually, the term “solar battery” refers to some combined photovoltaic converters (photovoltaic cells) – semiconductor devices that directly convert solar energy into direct current.
History of the solar battery
Even in ancient times, people began to think about the possibilities of using solar energy. According to legend, the great Greek scientist Archimedes burned the enemy fleet that was surrounding his city of Syracuse with a system of incendiary mirrors. It is known for sure that about 3000 years ago, the Sultan’s palace in Turkey was heated by water heated by solar energy. The ancient inhabitants of Africa, Asia, and the Mediterranean took table salt by evaporating seawater. However, above all people were drawn to experiments with mirrors and magnifying glasses. The real “solar boom” began in the 18th century, when science, freed from the shackles of religious superstition, went forward by leaps and bounds. The first solar heaters appeared in France. Naturalist J. Buffon created a large concave mirror, which focused the reflected sunlight on a point. This mirror was capable of quickly lighting dry wood at a distance of 68 meters on a clear day. Shortly afterwards, Swedish scientist N. Saussure built the first water heater. It was simply a wooden box with a glass lid, but the water, poured into a simple device, was heated by the sun at 88 ° C. In 1774, the great French scientist A. Lavoisier first used lenses to concentrate the thermal energy of sun. Soon a large glass of biconvex was polished in England, melting cast iron in three seconds and granite in one minute.
The first solar panels capable of converting solar energy into mechanical energy were rebuilt in France. In the late 19th century, at the World’s Fair in Paris, inventor O. Mushaud demonstrated an insulator – an apparatus that, using a mirror, centered the beams in a steam boiler. The boiler supplied a printing press that produced 500 newspaper prints per hour. A few years later, a similar device with a capacity of 15 horsepower was built in the United States.