15 Examples of Thermal Energy

The thermal energy, also known as caloric energy or calorific, is one that manifests itself in the form of hot. It is, however, the product of the movement or vibration of the atoms, so it is a manifestation of the internal energy of the system, which is nothing more than the Kinetic energy accumulated particles. For example: the chimneys, the Sun, the hot springs.

This type of energy is measured, like the others, in joules (J), according to the international system, although it is also usual to speak of calories: 4.18 joules, the amount of caloric energy necessary to raise a gram of water by one degree centigrade.

The amount of thermal energy in a system, as will be supposed, it has directly to do with the temperature exhibited by it. Thus, the more thermal energy (heat) we introduce into a container with water, for example, the more will raise its temperature, until it reaches the necessary one for a phase change: the water evaporates and passes from liquid to gaseous.

Thermal energy transmission

Thermal or heat energy can be transmitted from one medium to another or from one body to another in three specific ways:

Examples of thermal energy

1. Boil the water. As we said before, by introducing heat from a flame to a container of water, we can raise the temperature by multiplying the thermal energy of the system (its internal energy) until forcing the water to a change of phase (evaporation). The same happens with ice: if we remove it from the freezer, the heat from the environment will radiate towards the solid until it becomes liquid water again.
2. Chimneys. A fireplace is nothing more than a place in which a combustion from organic material constant so that the heat energy produced by the fire radiates to the joint rooms and keeps the house warm.
3. Heaters. Useful to keep the water at an ideal temperature, electric heaters operate based on a set of metallic resistances that transform the electric power in heat energy, increasing the temperature of the water to the proper point.
4. Sun. The largest source of thermal energy available to us is the sun, whose constant combustion processes radiate enormous amounts of heat and light to the surrounding universe. The cold blooded animals They take advantage of this energy source, for example, by exposing themselves to sunlight to warm their body.
5. The atomic bomb. The atomic bombs and their peaceful version, the central ones nuclear power, they do nothing but produce atomic chain reactions (controlled in the case of power plants and uncontrolled in the case of pumps) to generate large amounts of heat energy from the alteration of fundamental energies of atom.
6. Homemade thermos. A thermos full of hot coffee, for example, is ideal for observing the caloric energy that radiates (if we bring it closer to it) and that which is conserved (if we have a cup). This occurs because the material of the thermos prevents or considerably reduces heat radiation and preserves the temperature of the liquid.
7. Baking ovens. The furnaces work from the concentration of thermal energy to increase the temperature and exert changes in the food (to cook them). This energy comes from the energy transformation electrical (by resistance) or the continuous combustion of natural gas.
8. The human body. The chemical reactions that take place within our body, including our own breathing, generate an amount of thermal energy that maintains our body temperature around 37 ° C. That energy is perceptible and transmittable, in fact the coats work by preventing the escape of that heat through the surface of the skin.
9. The combustion of organic matter. Burning wood, coal or other flammable organic substances is a method of obtaining thermal energy common in the history of mankind. In fact, today that heat is used to boil water which in turn mobilizes the turbines that generate electricity.
10. The rubbing of surfaces. Kinetic energy and friction can often be converted to heat energy, such as when we repeatedly rub our bare hands and feel the friction raise the temperature. This movement increases the thermal energy and can then be transmitted by contact, if we apply freshly rubbed hands on another part of the body, as in massages.
11. A running engine. Internal combustion engines generate heat energy in abundance, since the controlled explosion inside and the flow electrical power of many of its parts, as well as the constant movement of the pistons, transform all the energy that they drive. This heat energy can be felt by putting your hands on the hood when the car has been running.
12. An incandescent light bulb. The passage of electricity in the filament of an incandescent light bulb produces light (yellow), but it also produces heat: that's why It is difficult to change a light bulb that has been on for a long time, its surface has accumulated the thermal energy that radiates from the passage of electrons.
13. Casting of metals. In metallurgy, the metal solids that are worked are exposed to extremely high temperatures in large smelting furnaces. This is to increase its thermal energy to the point of forcing, as in the example of water, a phase change. Thus, the metal becomes liquid and can be mixed or molded. During the time it takes to cool and solidify again, the metal it will radiate the excess thermal energy to the environment.
14. Environmental water vapor. In places with high humidity, where the air is loaded with water particles, the heat is perceived much more than in drier places, giving rise to a high thermal sensation. This is due to the fact that the water in suspension heats up and by convection of the thermal energy makes us perceive the environment at a higher temperature than it is.
15. Hot springs. Under the earth's crust there is water in reservoirs subjected to high pressures and high temperatures, which when sprouting towards the surface becomes thermal waters. These liquids have such thermal energy that they can melt icy layers upon reaching the surface, causing large jets of steam (geysers).

Other types of energy

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