History of energy timeline
Renewable energies are those that are obtained from natural sources and are inexhaustible or renewable. These energies have become a key part of achieving the Sustainable Development Goals (SDGs) and the goal of achieving the sustainability of the planet. Among them we can find solar, wind, hydro, geothermal, tidal, wave, biomass or biogas.
This type of renewable energy consists of harnessing electromagnetic radiation from the sun by means of photovoltaic cells, solar collectors or heliostats. Solar energy itself can be photovoltaic or thermal. The difference is that photovoltaic solar energy produces electricity directly from solar radiation. While thermal energy consists of taking advantage of solar energy to produce heat.
Solar energy is one of the renewable energies with the greatest potential for development, since the sun can be used to a greater or lesser extent as a source of energy anywhere on the planet. One of the key milestones for understanding the development of solar energy dates back to the 1970s, when the oil crisis led to the search for alternatives to reduce the price of crude oil.
What energy source is fire
Hydraulic, wind, solar, biomass and geothermal energy are clean and inexhaustible energies. As renewable energies, they play a predominant role in the energy transition. It is therefore essential to promote their development to combat climate change.
An energy is said to be renewable when its energy source is based on the use of natural resources, such as the sun, wind, water or biomass. Renewable energy is characterized by the fact that it does not use fossil fuels, but natural resources capable of unlimited renewal.
In addition to being inexhaustible energies, they do not produce greenhouse gases (GHG), the main cause of climate change, or pollutant emissions, so they have a very low environmental impact. It can be said that renewable energies are clean energy sources.
Why is nuclear energy not renewable? Nuclear energy is a decarbonized and non-polluting energy. It does not emit greenhouse gases into the atmosphere. However, uranium, the fuel used in nuclear reactors, is a limited resource. Therefore, nuclear energy is a clean but non-renewable energy.
Renewable energies: technology, economics, evolution and integration into the Electricity SystemEnergy is classified as renewable and non-renewable according to its capacity for renewal. A “renewable resource” is defined as that which does not run out with its use, since it returns to its original state after its use or is regenerated at a rate greater than or equal to the rate at which it is diminished by its use. According to this definition, it is true that some renewable resources may cease to be renewable if their rate of utilization is so high that their total renewal is prevented; however, some of these renewable resources can be classified as perpetual, since their depletion is not possible no matter how intensively they are used. Normally, the use of a renewable resource or energy has the intrinsic characteristic of producing a much lower impact on the environment compared to the use or transformation of non-renewable energy. The use of a renewable resource or energy has the intrinsic characteristic of producing a much lower impact on the environment compared to the use or transformation of non-renewable energy.
Renewable resources or energy. Characterization and technologies. For illustrative purposes, some of the renewable resources currently used for the production of renewable energy are: water, biomass, solar radiation, wind. In this way (see Technologies and costs of electricity generation):
They are those that come from sources considered inexhaustible, and which are characterized because in their transformation and exploitation processes they are not consumed on a human scale, either because of the immense amount of energy they contain or because they are capable of regenerating themselves over time. Among these energy sources are hydro, solar, wind and ocean energy. Similarly, depending on how they are exploited, energy from biomass, geothermal energy and biofuels can also be classified as renewable.
Our country has confirmed its leadership in renewable energies. We have the highest solar radiation in the world, strong winds from north to south to develop wind energy, a tremendous marine energy potential on our coasts, great capacity to develop biogas and a geothermal resource along our mountain range.
This is mainly due to the record investment in non-conventional renewable energy projects (NCRE), which has more than doubled: jumping from 1.3 billion dollars in 2014 to 3.2 billion dollars in 2015. The ranking considers four variables: enabling framework, investment, value chain and CO2 reduction.