Sources of energy

Renewable and Non-Renewable energy

•       Source of energy which is renewable is the source of energy which can be regenerated when it is used up.

•       Source of energy which is not renewable is the source of energy which cannot be regenerated again.

Renewable Energy

•       Nowadays, renewable energy is frequently used as an alternative energy to replace conventional energy and fossil fuels. The sources of alternative energy are, for example, wind energy, waterfall energy, solar energy, nuclear energy, tidal energy, geothermal energy, and biomass energy

Wind energy

•       Wind is one of many renewable sources of energy, because it is always available.

•       Since hundred years ago, windmills have been used to grind and to pump water.

•       Nowadays, windmills are used to drive electric generators to produce electricity.

Waterfall energy

•       Waterfall is a good resource of energy since is always moves the turbine. Moving water has sufficient potential and kinetic energy.

•       Advatages are efficient in receiving electrical energy, can be used for irrigation and as an object of tourism, and electrical energy becomes cheap

Solar energy

•       Easy to get

•       Pollution free

•       2 methods to collect the energy

•        Passive method has been used since many centuries ago. Example now is glass windows.

•        Active method is to use solar panels to collect the sunray. It transforms solar energy to thermal energy and becomes electrical energy.

8.

Nuclear Energy

•       The nuclear energy is from the energy release generation by the splitting of the atomic nucleus. The reaction is called fission. This fission produces a huge amount of energy which is called nuclear energy. Nowadays, nuclear energy is used for electric power plant, and usually called a nuclear power plant.

•       Operation of a nuclear power plant is based on fission. Fission is the process of a heavy nucleus into two lighter nuclei accompanied by a huge energy release.

•       Fusion  is the process of joining the nuclei of atoms accompanied by a huge energy release.

 

Tidal Energy

•       The tidal of river water can be used to generate electricity; the power plant is called a tidal power plant. But it has high construction cost!!!\

Geothermal Energy

•       It uses a hot geyser or steam

•       A power plant which uses geothermal is called a geothermal power plant. There are many in Indonesia.

•        Since it needs a hot geyser, the disadvantages are limited areas which conform to the requirement for the operation and high cost.

Biomass energy

   •       Energy coming from plants or animals. To get biomass energy, plants are processed into alcohol. Then, similar to gasoline, the alcohol can be used as a fuel for engine combustion. Plants that can be processed to get the alcohol are sugar cane, cassava, wheat, and seaweed.

Non-renewable Energy

•       Source of energy which is not renewable is the source of energy which cannot be regenerated again. Examples are fossil fuel, trees, water, land