What is energy
Energy is so intertwined with our everyday life that only its absence makes its necessity evident. All human activities bind, produce, consume, transform, store, and degrade huge amounts of energy. Every citizen of developed countries consumes as much energy as the muscles of 100 large men or 12 strong horses produce.
The action appears in many formats. Motion, heat, chemical bond energy or electricity. Even mass is a form of energy. Energy can come from different sources such as wind, coal, timber or food. All energy sources have a common feature. Their use enables us to put objects in motion, change temperatures, produce sound and image. In other words, we are given the opportunity to produce work.
Where does the energy come from?
The cycle of energy production and consumption starts with the original forms of energy such as coal, crude oil, wind, sunlight or natural gas. These forms are characterized as primary energy and, of course, they can hardly be used by consumers. The next step is to transform primary forms into final energy such as electricity or gasoline. Finally, suitable equipment or devices such as the car or TV convert final energy into useful energy by providing energy services.
Energy sources
The commonly used term "Energy Sources" is not scientifically valid because, according to the Energy Conservation Act, energy is neither created nor destroyed. It simply changes styles. Generally, however, the term Energy Sources describes power generation potential. Energy sources are generally classified into two categories:
Nonrenewable
Renewable
Energy is so intertwined with our everyday life that only its absence makes its necessity evident. All human activities bind, produce, consume, transform, store, and degrade huge amounts of energy. Every citizen of developed countries consumes as much energy as the muscles of 100 large men or 12 strong horses produce.
The action appears in many formats. Motion, heat, chemical bond energy or electricity. Even mass is a form of energy. Energy can come from different sources such as wind, coal, timber or food. All energy sources have a common feature. Their use enables us to put objects in motion, change temperatures, produce sound and image. In other words, we are given the opportunity to produce work.
Where does the energy come from?
The cycle of energy production and consumption starts with the original forms of energy such as coal, crude oil, wind, sunlight or natural gas. These forms are characterized as primary energy and, of course, they can hardly be used by consumers. The next step is to transform primary forms into final energy such as electricity or gasoline. Finally, suitable equipment or devices such as the car or TV convert final energy into useful energy by providing energy services.
Energy sources
The commonly used term "Energy Sources" is not scientifically valid because, according to the Energy Conservation Act, energy is neither created nor destroyed. It simply changes styles. Generally, however, the term Energy Sources describes power generation potential. Energy sources are generally classified into two categories:
Nonrenewable
Renewable