Solar energy is an essential driver of economic growth for the global economy, an open door to energy efficiency.
Energy consumption and ecological transition
The fossil fuels are consumed at a rate phenomenally well above the speed where they are produced naturally.
Although theoretically global oil reserves and lignite, coal and natural gas still allows even hold a little longer, the current deposits are becoming less accessible.
Although they are indispensable and that their findings have enabled man to make a great leap forward on the ladder of evolution, their nuisance and pollution they bring and their negative impacts on global warming have become global.
In just a few centuries, irrational energy consumption was due to a condition that the man believed inexhaustible.
Added to this, global geopolitical and economic constraints on energy resources have created a conflict of energy interests that shaped irreversibly history.
Currently the global energy policy is moving more and more towards the sector of renewable energy, natural and ecological.
Considered “inexhaustible, free and environmentally friendly,” these new solutions have the ability to renew itself quickly from healthy to deal with the energy consumption of modern man.
The gradual substitution of fossil fuels by these new sources of alternative energy, “cleaner”, generating little or no waste or emissions, resulting in the gradual adoption of solar , wind, hydro, biomass and geothermal.
The development of these new energy sources that do not emit greenhouse gases, is part of the process of energy transition.
This is a major and necessary trend towards sustainable development based on a rational and environmentally friendly energy consumption.
Solar energy free and sustainable energy future
The sun, the largest on earth energy provider
The sun is an inexhaustible source of energy, it is present all over the globe, except for polar areas who are deprived of light for six months during the year.
Apart from geothermal energy produced by the internal heat of the earth, tidal energy generated by the interaction of the earth and moon, creating the ocean tides, or nuclear energy produced by nuclear fission minerals, the sun is in itself one of the main sources of renewable energy on earth.
Directly or indirectly, the sun is responsible for the water cycle, waves and ocean currents help to highlight hydro and wave.
Wind energy, in turn, was born by solar radiation associated with the rotation of the earth and the perpetual movement of winds and air masses.
This is even with the sunlight that man takes advantage of biomass energy : man has enjoyed and still enjoys the forest and wood for heating or cooking food through photosynthesis.
In short, solar energy is the most common, the most accessible, the most renewable and most widespread on earth.
This free and sustainable energy will still be available for at least 4.5 billion years! The potential of this energy source is virtually unlimited.
The different forms of solar energy
There are generally four types of uses of solar energy:
The first is used to produce hot water through solar panels mounted on roofs of houses.
Its use has rapidly democratized, especially from individuals, because of its simplicity and low cost price.
The second form of solar energy is called “passive heating” because it uses passive solar radiation to retain heat.
Very simple, it can heat dwellings and houses, like residential buildings using baptized “bioclimatic houses”.
Solar photovoltaic modules
The third technology produces electricity through photovoltaic solar modules in the form of assembly of PV cells.
They capture the sun’s energy to convert into electricity.
The energy channeled perhaps stored in batteries for individuals living in remote locations.
In other cases, it is produced in large quantities and injected on a grid and wider public: it is a photovoltaic solar plant.
Solar ovens “concentration”
In the same vein, the solar ovens “concentration” include guiding sunlight directly on game dishes and mirrors.
The concentration of solar energy on these surfaces provides temperatures from hundreds to thousands of degrees.
Depending on requirements, it is cooked food or water is heated it. This simple solution is best suited for people living in desert and semi-desert.
In all cases, these processes require at least a good concentration of light, a more or less sunshine as required, all associated has a good location and a precise orientation of the panels.
The use of solar energy gives hope to the extent that it could lead to energy independence, itself integral to sustainable development and consumption.
Both clean, inexhaustible and accessible to all, solar energy solution not only offers this much sought energy security, but it also has many benefits for the safe development and financial investments, the same time creating thousands of jobs and surplus production can be sold and exported by the countries concerned.
In addition, the risk of accidents, nuisances and pollution are very low.
The plants are easy to manage and the consequences are less accident.
These hazards are easy to identify and in many cases, facilities are recyclable.
Today, out of respect of environmental ethics, industrial and solar facilities comply accurate processing chain, either in terms of materials for installations, from their manufacture to their end of life.
However, the constraints and limitations need to be raised. These relate to:
- The availability
- The storage management
- The distributions
- The organizational and economic constraints
The weather conditions play a major role in obtaining a favorable solar radiation, it is only available during the day.
These climatic parameters associated with the geographical conditions are not always conducive from one point to another of the world map.
It should be emphasized that some families of materials “rare earth” used in the manufacture of photovoltaic cells, like “indium” and “gallium” are easily accessible.
Their extraction is a very important pollution and global reserves of these rare materials are limited.