We say that an energy is renewable when it comes from a natural source and does not run out over time. In addition, it is clean, does not pollute and its resources are very varied. There is a wide variety of renewable energies on our planet and, as technology advances, more ways are discovered to harness the energy of our planet without having to resort to Fossil fuels and continue with the effects of climate change.
In this article, we are going to teach you all the types of renewable energy that exist so that you can see and analyze the capacity we have to generate green energy without damaging our planet and promoting quality employment. Do you want to know what the types of renewable energies are? Keep reading to find out.
Biofuels
Starting with transport, we must mention that it is a sector that consumes a large amount of fuel and therefore pollutes the atmosphere. To avoid Excessive pollution, rising crude oil prices and oil depletion, biofuels were developed.
Biofuels are liquid or gaseous fuels produced from biological raw materials, whether plant or animal. As a renewable energy source that is not depleted, they can meet transport demand and reduce dependence on oil, while also reducing environmental pollution.
Among the most important biofuels are: Biodiesel and bioethanolBiodiesel is obtained from fresh vegetable oils. On the other hand, bioethanol is produced from materials rich in sugar or starch, such as sugar cane. By using it, the carbon footprint generated by vehicles can be significantly reduced.
Biomass energy
Another type of renewable energy is biomass. This is all the organic matter used for energy generation. This set of organic matter is heterogeneous and comes from different origins, such as agricultural and forestry waste, wastewater, sewage sludge and the organic fraction of urban solid waste.
Biomass energy can be generated through several processes, such as Combustion, anaerobic digestion, gasification and pyrolysisThrough these methods, both heat and electricity can be generated, making biomass a versatile renewable alternative for various sectors, including agriculture and industry.
Energía eólica
La wind power It is one of the most widely used in the world. It is based on taking advantage of the kinetic energy that a mass of air has and convert it into electricity.
The first uses of this energy date back to ancient times, when man used the wind to propel ships with sails, move mills to grind grains or pump water. Today, they are used wind turbines to generate electricity in various facilities, both on land and at sea.
There are two types of wind energy: onshore and offshore. Offshore wind energy takes advantage of more constant and stronger winds than those found on land.
Geothermal Energy
Geothermal energy It is a renewable energy that comes from the heat stored under the Earth's surface. It takes advantage of the temperature difference in the inner layers of the planet to generate energy, either for electricity or for heating. This energy is available on 24 hours a day, 365 days a year, making it an inexhaustible source.
There are two main types of geothermal energy: high-enthalpy and low-enthalpy. High-enthalpy is used for large-scale electricity generation, while low-enthalpy is more suitable for local domestic or industrial use, such as providing low-consumption heating.
Marine energy
La marine energy It is also a renewable source that harnesses the potential of the oceans. Unlike other sources, there is no unique way to extract this energy, as it can be harnessed through different technologies depending on the phenomenon used, such as tides, waves or even temperature differences between the ocean surface and the deep sea.
An advantage of marine energy is that it does not generate significant environmental or visual impacts, which makes it very attractive for large-scale development. Although this energy does not yet have a majority share in energy systems, it is expected that with technological advances it will become a key resource in the future.
Small wind energy
La small wind power It works in a similar way to wind energy, but differs in that its wind turbines have a power less than 100 kW and a blade sweep area less than 200 square metersThis type of energy is focused on self-consumption and the supply of electricity in more remote and isolated areas from the conventional electricity grid.
Mini wind power also helps reduce energy losses during transport and distribution, making it an efficient alternative for residential consumption and small businesses.
Hydraulic energy
Hydraulic power It is one of the oldest and most widely used in the world. This energy is obtained by harnessing the kinetic energy of moving masses of water, such as in rivers or dams.
When water moves, it generates a jump that moves a turbine, which is connected to a generator that converts this movement into electricity. Hydroelectric power plants were one of the most Main sources for the production of electrical energy until the mid-20th century. They are still in use today and are considered one of the cleanest and most stable options for producing electricity without generating a significant carbon footprint.
Solar energy
La solar energy takes advantage of solar radiation to generate electricity or heat. Within this category, we find three main types:
Photovoltaic Solar Energy
La Photovoltaic Solar Energy It directly transforms incident solar radiation into electricity through the use of solar panels. These are made up of photovoltaic cells that, upon receiving solar radiation, excite electrons and generate a potential difference, thus producing electricity. This type of energy is on the rise, both at residential and industrial levels, due to reduced costs and improved panel efficiency.
Solar thermal
La solar thermal It uses the sun's heat to cover thermal needs in buildings, industries and the agricultural sector. Like photovoltaics, it is an environmentally friendly and highly efficient option.
Thermoelectric solar energy
Finally, we have the thermoelectric solar energy, which uses solar concentrators to focus radiation onto a smaller surface and raise the temperature. Through this technique, heat is converted into electricity using high-temperature fluids. This technology is available on both a small and large scale and has enormous growth potential in the coming years.
With the advancement of technology, all these renewable energies are destined to become fundamental pillars of the energy mix of the future. The use of inexhaustible natural sources not only reduces CO2 emissions, but also promotes energy independence and generates quality employment in various sectors. Taking advantage of these opportunities will transform the way we obtain energy and contribute to a cleaner and more sustainable planet.