Nuclear Power Plant Isar, Germany

Spent nuclear fuel pool

Turbine of a nuclear plant

Tag: energy

Definition of energy

Definition of energy

Ability of a physical system to produce a job.

This definition, although it is the most widespread, can be misleading because of the vagueness of the term "capacity", and therefore, it is better to define the energy as what, when a work occurs, decreases in an amount equal to the work produced. Energy, then, is measured in the same units as labor.

History of the study of energy

The notion of energy appears for the first time from the investigations of Joule and Carnot on the conversion of heat in mechanical work and thanks to the theory of Helmholtz in which it connects…

Chemical energy

Chemical energy

Chemical energy is the potential of a chemical to undergo a transformation through a chemical reaction or to transform into other chemicals. Forming or breaking chemical bonds involves energy. This energy can be absorbed or evolved from a chemical system.

The energy that can be released (or absorbed) by a reaction between a set of chemical substances is equal to the difference between the amount of energy of the products and the reactants. This change in energy is called the internal energy of a chemical reaction.

The internal energy change of a process is equal to the change of…

Electric power. What is it?

Electric power. What is it?

We define electrical energy as the form of energy that results from the existence of a potential difference between two points. When these two points are brought into contact by an electric conductor we obtain an electric current.

Physical aspects of electrical energy

From a physical point of view, electrical energy is negative electrical charges (electrons) that move through the electric conductor, usually metallic, due to the potential difference between its ends. The reason metal conductors are usually used is because they have more free electrons.

Electric charges moving…

Renewable energy

Renewable energy

Renewable energies are those energies using an energy source or fuel which is considered inexhaustible or can be regenerated at the same rate at which it is consumed.

The classification of renewable energy depends on natural resources exploited.

Solar energy

We distinguish two ways of using solar energy:

  • Solar thermal
  • Solar photovoltaics

The use of solar thermal is to use heat energy obtained from solar radiation to heat a fluid, depending on its temperature,…

Heat energy definition

Heat energy definition

Heat energy is the manifestation of the energy in the form of heat. All materials have atoms that form molecules with constant movement and vibration. This movement of atoms generates a kinetic energy called heat or heat energy.

If we increase the temperature of any element, we increase its heat energy. However, when we increase the heat energy of an element it's not guarantee that its temperature is increased. The temperature is the same during the stage of changes. A good example is heating some water. Little by little we obtain heat…

History of nuclear energy

The Greek philosopher Democritus of Abdera was the first in history to give a definition of atom as the smallest constituent of matter, in the V century B.C. The term "atom" is a Greek word that means "not divisible". But later, with the arrival of nuclear fission it's possible to split atoms to…

Nuclear power in France

In 1974 the French government decided to rapidly expand production capacity of nuclear power in France just after the first oil crisis. This Decision n was made in the context of a France with substantial competition in engineering, but few indigenous energy resources. Nuclear power, with the cost of fuel is a relatively small the total cost, in this sense, getting a reduction in imports and greater energy security could.

As a result of the decision of 1974, France currently has a high level of energy independence and almost the lowest cost electricity in Europe. It also has a level…

Nuclear power plant definition

A nuclear power plant is a facility for the production of electricity using nuclear energy.

Its operation is similar to a thermic power plant. The difference is that the power source from a nuclear plant is nuclear fission of certain atoms while in a thermic power plant the heat source (thermal energy) from burning of one or more fossil fuels (coal, natural gas , fuel ..). As in a conventional thermal power plant the heat is used to generate steam that drives a steam turbine connected to a generator that produces electricity.

The thermal energy that nuclear power…

Nuclear fusion

Nuclear fusion is a nuclear reaction through which two light nuclei of atoms, usually hydrogen and its isotopes (deuterium and tritium), are combined forming a heavier nucleus. This binding is usually accompanied by the emission of particles (in case of deuterium nuclei one neutron is emitted). This nuclear fusion reaction releases or absorbs a lot of energy in the form of gamma rays and kinetic energy of the emitted particles.This large amount of energy transforms matter to a plasma state.

Nuclear power in Mexico

Mexico is rich in hydrocarbon resources and is a net exporter of energy. Country's interest in nuclear energy is based on the need to reduce their dependence on these sources of energy. In recent years, Mexico's energy is increasingly dependent on natural gas.

The energy growth was very rapid in the 1990s, but then stabilized for a few years. Since 2007 expected new growth in demand for electricity to an average rate of almost 6% per year. In 2007, we generated 257 million kWh. Supply Origin is varied electric, gas 126 TWh (49%), oil of 52 TWh (20%), coal 32 TWh (12.5%) and hydroelectric…

Advantages and disadvantages of nuclear power

In this section we analyze the advantages and disadvantages of nuclear power. Nevertheless, most organizations related to nuclear energy are already positioned for or against the use of nuclear power. On this site we try to make an objective analysis about this question, giving all the relevant information and offering a space for different conclusions.

Advantages of nuclear power

The generation of electricity through nuclear energy reduces the amount of energy generated from fossil fuels (coal and oil). Less use of fossil fuels means lowering…