Classification of energy sources

It is divided into traditional energy (also known as conventional energy) and new energy (also known as unconventional energy). ?

Energy mainly includes the following categories:

(1) The first category is solar energy from outside the earth, including fossil resources (coal, oil, natural gas, etc. ), biomass energy, hydropower, wind energy, ocean energy and other resources. The second category is the energy resources contained in the earth itself, mainly nuclear fission energy, nuclear fusion energy and geothermal energy resources. The third category is the energy formed by the regular movement of the earth, the moon, the sun and other celestial bodies, such as tidal energy.

(2) According to whether it can be regenerated, it can be divided into renewable energy and non-renewable energy. Energy that can be continuously recycled is called renewable energy, such as wind energy, water energy and solar energy. Those energy sources that have been formed over hundreds of millions of years and cannot be recovered in a short time are called non-renewable energy sources, such as raw coal, crude oil and natural gas.

(3) According to the transformation and transfer process, primary energy refers to all kinds of energy and resources directly taken from nature without processing and transformation, including raw coal, crude oil, natural gas, oil shale, nuclear energy, solar energy, hydropower, wind power, wave energy, tidal energy, geothermal energy, biomass energy and ocean temperature difference energy. Secondary energy is energy products obtained by processing and transforming primary energy, such as electricity, steam, gas, gasoline, diesel oil, liquefied petroleum gas, alcohol, biogas, hydrogen and coke.

(4) According to the types of use, it is divided into traditional energy (also known as conventional energy) and new energy (also known as unconventional energy). Conventional energy sources include hydropower, gasoline, steam, coal, oil, natural gas and other resources. New energy sources include solar energy, geothermal energy, nuclear energy, wind energy, ocean energy, biomass energy and nuclear fusion energy.

New energy:

1. nuclear energy: the energy generated when the nucleus splits or polymerizes. Fission: bombarding a relatively large nucleus with neutrons, splitting it into two medium-sized nuclei and releasing huge energy at the same time. Applications: nuclear energy, atomic bomb. (2) Fusion: The nuclei with smaller mass combine into new nuclei at ultra-high temperature, releasing more nuclear energy. Application: hydrogen bomb.

2. Solar energy: refers to the radiant energy released by the high-temperature nuclear fusion reaction in the sun, of which about one billion reaches the earth's atmosphere, which is the source of light and heat on the earth. The sun is a huge "nuclear melting pot"; The sun is a treasure house of human energy. Utilization: ① heating with a heat collector; (2) Using solar cells to generate electricity.

3. Ocean energy: refers to various renewable energy sources contained in seawater, including tidal energy, wave energy, ocean current energy, seawater temperature difference energy, seawater salinity difference energy, etc. These energy sources have the advantages of being renewable and not polluting the environment, and are strategic new energy sources that need to be developed and utilized urgently. Application: tidal power generation, wave power generation, etc.

4. Wind energy: It is formed by flowing under solar radiation. Wind energy resources are abundant, widely distributed and never exhausted, which is especially important for islands and remote areas with inconvenient transportation and far from the main power grid. Application: Wind power generation-At present, there are two ideas: horizontal axis fan and vertical axis fan, and horizontal axis fan is the mainstream model of wind power generation at present.

5. Biomass energy (also known as bioenergy) refers to the utilization of organic substances (such as plants). ) as a fuel, energy is generated by technologies such as gas collection, gasification (converting solid into gas), combustion and digestion (wet garbage only). Biomass energy comes from biomass, which is stored solar energy. It comes directly or indirectly from the photosynthesis of plants. It is the only renewable carbon source that can be converted into traditional solid, liquid or gas fuels. Biomass energy resources on the earth are abundant and harmless. Utilization: building biogas digesters to generate material fuel.