Renewable energy is that energy that comes from practically inexhaustible natural sources. They are considered inexhaustible either because of the large amount of energy they contain or because they can be regenerated naturally. Examples of renewable energy
Renewable energy can be used to generate electricity but it can also be used in other applications. Here are some examples of renewable energy:
- Solar photovoltaic panels.
- Solar thermal energy for heating.
- Pool heating by solar energy.
- Thermal centers by geothermal energy.
Thermal energy is called energy released in the form of heat. It can also be called heat energy.
Heat energy can be obtained in several ways:
- of the nature. It would be the case of geothermal energy or solar thermal energy.
- from chemical energy,
- by an exothermic reaction, like the combustion of some fossil fuel.
- for a reaction of fission nuclear energy or nuclear fusion energy. By splitting the nucleus of an atom a large amount of heat is obtained.
- by electric energy by Joule effect or by thermoelectric effect
- by friction, as…
Geothermal energy is a type of renewable energy on a human scale that is obtained from the heat of the interior of the Earth. Equestrian thermal energy can be obtained without the combustion of any material, it is therefore a form of clean energy without carbon dioxide emissions.
The temperature in the inner layers of the Earth remains constant during the different seasons of the year. Generally the inner layers are hotter than the surface in winter and cooler in summer. This is because the surface layers are heated and cooled more easily according to the laws of thermodynamics.…
The characteristics of solar energy imply certain advantages with respect to other sources of energy.
Although the characteristics are different in photovoltaic solar installations and solar thermal installations, we will treat the disadvantages globally.
Certain disadvantages of solar energy may imply that a solar installation may be unfeasible. The aspects to consider are the following:
- Energy efficiency is poor compared to other energy sources.
- The economic cost compared to other options.
- Performance is a function of the weather.
In general, both photovoltaic solar energy and, above all, solar thermal energy has a very good acceptance in society. However, it is convenient to know the advantages and disadvantages of solar energy to reinforce or contrast our opinion.
When we talk about energy sources, most people are positioned in favor or against a certain type (solar energy, nuclear energy, wind power, etc.). The arguments for positioning are varied: energy efficiency, pollution, safety, cost ... Therefore, we will try to analyze the advantages and disadvantages of solar energy in the most objective way possible.…
The solar thermal energy consists of the use of energy from the Sun to transfer it to a medium that carries heat, usually water or air.
Among the different applications of solar thermal energy there is the possibility of generating electric power. The current technology allows to heat water with solar radiation to produce steam and subsequently obtain electrical energy.
Although the principle of operation is very similar there are two main applications of solar thermal energy:
- Thermal single energy for use in homes and small installations
- Large thermal solar…
In thermodynamics, the internal energy is the total energy that contains a thermodynamic system.
Internal energy is the energy needed to create the system. According to this definition, energy to displace the system environment, any energy related to external force fields, or any energy associated with movement is excluded from internal energy.
The internal energy of a system can be modified by exerting a work on it or by heating it (providing heat energy). If we look at the first law of thermodynamics we see that this postulates that the increase of internal energy is equal to…
The first law of thermodynamics was announced by Julius Robert von Mayer in 1841. It is the principle of conservation of energy.
Definition of the first law of thermodynamics: The total energy of an isolated system can neither be created nor destroyed, it remains constant. Energy only transforms from one type to another. When a class energy disappears an equivalent amount of another class must occur.
A body may have some speed with what has kinetic energy. If you lose speed loses this kinetic energy is transformed into another type of energy, potential energy either (if you purchase…
The term solar energy refers to the use of the energy that comes from the Sun. It is a type of renewable energy and the energy contained in the Sun is so abundant that it is considered inexhaustible. The sun takes 5 billion years to emit solar radiation and it is estimated that it has not yet reached 50% of its existence.
Solar energy, besides being inexhaustible, is abundant: the amount of energy that the Sun pours daily on Earth is ten thousand times greater than that consumed every day on the planet. The radiation received is distributed in a more or less uniform way over the entire…
Hydropower is a source of renewable and alternative energy. This renewable energy exploits the transformation of gravitational potential energy, possessed by a certain mass of water at a certain elevation, in kinetic energy to overcome a certain difference in height. The mechanical energy obtained can be used directly to rotate the shaft of a turbine or in some application or machine that works in hydraulic power. The most common is to use this kinetic energy to generate electrical energy. In this case, we talk about hydroelectric power.
In hydroelectric power, the kinetic energy is…
Non-renewable energies are the methods of obtaining energy through a source of exhaustible energy. The concept of non-renewable energy is taken into account at the scale of human life, since certain processes, such as the accumulation of carbon, have taken up to five hundred million years.
In general, non-renewable energy is what consumes some type of fuel (oil, coal, uranium ...). While renewable energy uses other types of energy resources (solar radiation, the kinetic energy of the wind, the force of water, the movement of the tides, etc.). Although properly speaking some fuels, in…