It is divided into two types: traditional energies (also called conventional energies) and new energies (also called unconventional energies). ?
There are mainly the following categories of energy:
(1) Classification by source: The first category is energy solar coming 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 concerns energy resources contained within the Earth itself, primarily nuclear fission energy, nuclear fusion energy and geothermal energy resources. The third category is energy formed by the regular movement between the earth, moon, sun and other celestial bodies, such as tidal energy.
(2) Depending on whether itcan be regenerated, it is divided into renewable energy and non-renewable energy. Energy that is continuously renewable and used continuously is called renewable energy, such as wind power, water power, solar power, etc. Energy that has been formed over hundreds of millions of years and cannot be restored in the short term is called non-renewable energy, such as raw coal, crude oil, natural gas, etc.
(3) Primary energy is classified according to the conversion and transfer process. It refers to various energies and resources directly extracted from nature without processing or conversion. It includes: crude coal, crude oil, natural gas, oil shale, nuclear energy and solar energy, hydropower, wind energy, wave energy, tidal energy, geothermal energy, biomass energy and temperature difference energy of oceans, etc. Energysecondary is an energy product obtained after treatment and conversion of primary energy, such as: electricity, steam, gas, gasoline, diesel, liquefied petroleum gas, alcohol, biogas, hydrogen and coke, etc.
(4) According to the type of use, it is divided into two types: traditional energy (also called conventional energy) and new energy (also called non-conventional energy). Conventional energy sources include: hydroelectricity, gasoline, steam, coal, oil, natural gas and other resources. New energy includes: solar energy, geothermal energy, nuclear energy, wind energy, ocean energy, biomass energy and nuclear fusion energy, etc.
New energy:
1. Nuclear energy: Energy generated when atomic nuclei split or clump together. ① Fission: usedez neutrons to bombard a relatively large atomic nucleus, causing it to fission into two medium-sized nuclei, at the same time releasing enormous energy. Application: nuclear energy, atomic bomb. ② Fusion: Nuclei with smaller masses combine to form new nuclei at ultra-high temperatures, releasing greater nuclear energy. Application: hydrogen bomb.
2. Solar energy: refers to the radiant energy released by the high-temperature nuclear fusion reaction inside the sun, about one billionth of which reaches the earth's atmosphere and is the source of light and heat on the earth. . The sun is an immense “nuclear energy furnace”; the sun is a treasure trove of human energy. Use: ① Use collectors for heating; ② Use solar cells to generate electricity.
3. Ocean energy: refers to various sources of energy renenergy contained in sea water, in particular tidal energy, wave energy, ocean current energy, sea water temperature difference energy, salinity difference energy sea water, etc. These energy sources have the advantage of being renewable and not polluting the environment. These are new sources of energy of strategic importance that urgently need to be developed and used. Application: tidal power generation, wave power generation, etc.
4. Wind energy: This is solar radiation formed by downward flow. Wind energy has large reserves, is widely distributed and will never be exhausted. It is particularly important for islands and isolated areas where transportation is inconvenient and far from the main power grid. Application: Wind energy production - There are currently two ideas: horizontal axis fansal and vertical axis fans. Horizontal axis fans are currently the main model for wind power generation.
5. Biomass energy (also known as bioenergy) uses organic matter (such as plants, etc.) as fuel through gas collection, gasification (transformation of solids into gas), combustion and digestion (only technologies such as low moisture waste) to produce energy. Biomass energy comes from biomass, which is stored solar energy. It is directly or indirectly derived from plant photosynthesis. It is the only renewable carbon source and can be converted into conventional solid, liquid or gaseous fuels. Biomass energy resources are relatively abundant on earth and provide a harmless source of energy. Use: Building digesterss of biogas to produce biomass-based fuel.