40 things about the solar energy you should know

solar energy

The consumption of non-renewable energy sources such as oil, gas, and coal, and our dependence on them is increasing. Therefore, the development of renewable energies such as solar, wind or geothermal energy should be promoted. solar energy

In this article, we will refer to the 40 most important facts about solar energy that you should know.

  • It is a source of totally free energy since it comes from the sun. Although the sun is more than 149 million kilometers away, light reaches the earth in less than 9 minutes.
  • It can be used in multiple ways: solar photovoltaic, solar heating, artificial photosynthesis, solar architecture, and solar cooling.
  • Solar technologies can be classified as active and passive. Photovoltaic panels and thermal collectors that take advantage of solar energy are examples of active solar technologies.
  • Earth receives 174 petawatts (PW) of solar radiation in the upper atmosphere. Around 30% is reflected back into space and the rest is absorbed by the oceans, clouds and the earth’s surface.
  • The earth receives around 1,366 watts of solar radiation per square meter.
  • Despite its great potential, only a small fraction of the world’s solar energy is used.
  • The energy of the sun can also be used to obtain drinking water. Without the use of chemicals or electricity, water can also be purified by the sun.
  • The water cycle is very influenced by solar radiation. The earth, the oceans, and the atmosphere absorb solar radiation and its temperature rises. Hot air rises from the oceans and creates convection currents.
  • Space missions would not be possible without the power supply coming from solar energy.
  • It is one of the most promising alternative energy sources, as it is not a pollutant and does not produce greenhouse gases.
  • Through photosynthesis, solar energy is converted by green plants into chemical energy, creating biomass. This biomass, with enough time, could become fossil fuels.
  • Horticulture and agriculture seek the maximum use of solar energy. For this, the perfect time of planting and sowing is studied.
  • The solar heating systems provide hot water from the sun’s energy. In some areas and buildings, 60-70% of hot water (60 ° C) comes from the sun’s energy.
  • Solar chimneys are passive forms of ventilation through the sun.
  • New solar mega plants with the capacity to produce more than 550 MW are being built.
  • It is also possible to cook using ovens or solar cookers
  • The electricity obtained from the sun’s energy is made by direct methods (photovoltaic solar panels) or indirect (concentration solar).
  • Solar chemical processes can replace fossil fuels and can allow the storage and transport of solar energy. Through photosynthesis can obtain a variety of fuels. The technology to obtain hydrogen is a remarkable field in chemical solar energy.
  • It can also be stored in salts, as is the case with indirect solar concentration methods that allow electricity to be obtained even when there is no sun.
  • The oil crisis in the 70s was the great promoter of renewable energy such as solar energy.
  • Many homes have solar panels to produce much of their hot water.
  • Solar energy is not polluting, has no harmful effects on the environment and is considered a clean energy.
  • Solar energy is one of the most used renewable energy sources in the world.
  • Solar energy is a very reliable source of energy, in the sense that its origin is in the sun and as long as it does not disappear, we can continue to take advantage of it.
  • The new technological advances improve day by day the efficiency in the use of solar energy, making it more profitable.
  • Solar energy could become one of the largest sources of energy in the world, given its enormous potential and long-term advantages.
  • The largest solar plant (as of 2014) in the world is located in California (USA). It is the Topaz Solar Farm and occupies 25 square kilometers.
  • Solar energy is the perfect alternative for obtaining electricity in isolated or remote areas that cannot be connected to the national electricity grid.
  • Many small appliances such as calculators have been using small solar panels for their operation for decades.
  • Solar panels hardly require maintenance so once installed they do not entail many more costs.
  • Installing solar panels can reduce our electricity bills by selling the electricity produced to the grid.
  • Solar energy does not produce any noise pollution, having no moving parts, and does not require any fuel, except the sun, to produce electricity.
  • Solar kits for domestic use include one or several solar panels, an inverter, a battery, a regulator, wiring and small additional materials. Solar energy is absorbed by the panels and the equipment converts it to electricity.
  • Thanks to the use of batteries, electricity from the sun can be used 24 hours a day.
  • Solar energy is measured in kilowatt-hours. 1 kilowatt = 1000 watts.
  • Solar energy is used in many applications such as obtaining electricity, evaporation, obtaining biomass, heating water and buildings, and even in transportation.
  • The large investments required at the beginning are one of the main reasons why solar energy is not more widespread.
  • The man has used solar energy since time immemorial. In the year 700 a.c. glass lenses were used to make fire.
  • The sun is also the beginning of fossil fuels since they were created from plants and animals millions of years ago.
  • Clouds and pollution block the arrival of the sun’s rays on the earth’s surface.

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