Hydraulic and wind power are renewable energy sources.
Renewable energy
1. Solar energy: Directly from solar radiation. The main purpose is to provide heat and electrical energy.
2. Bioenergy: Green plants convert solar energy into chemical energy through photosynthesis, which is stored in the body, can flow in one direction along the food chain, and is finally converted to heat energy and lost. Biogas is obtained by combustion and anaerobic fermentation to obtain energy.
3. Wind Energy: Energy is provided by solar radiation. Due to uneven cold and heat, differences in atmospheric pressure occur, leading to horizontal movement of air - the formation of wind. Energy is mainly obtained from wind turbines.
4. Water energy: energyis provided by solar radiation, creating a water cycle. Warm, moist ocean air rises when heated, and solar energy is converted to potential energy when precipitation forms. In high mountains, water flows downward. Potential energy is converted into kinetic energy, which is the energy of water. Energy is obtained mainly through hydroelectric generators.
5. Ocean Energy: The energy contained in the movements of sea water, including tides, waves, ocean currents, etc. is also inexhaustible. Tidal energy comes primarily from the gravity of celestial bodies such as the moon and sun, while the energy of ocean waves and currents is primarily affected by wind. It mainly produces electricity using the kinetic energy of the tides.
6. Geothermal energy: comes from the decay of radioactive elements in the iinterior of the earth. Can be used for geothermal power generation and heating.
7. Hydrogen Energy: Obtain energy through combustion or fuel cells.
8. Nuclear Power: Obtaining energy from nuclear power plants.
Detailed information:
Characteristics of renewable energy:
In the specific temporal and spatial conditions of nature at this stage, the natural renewable energy resources It can continue to regenerate, reproduce and grow, maintain or increase its reserves and regenerate depending on the source of the seeds.
Once the source of the species disappears, the resource can no longer be regenerated. This requires scientific and rational use and protection of the source of the species before regeneration is possible.t that “the inexhaustible” is possible. Soil is a renewable resource because its fertility can be continually renewed through artificial measures and natural processes.
Renewable energy generally refers to a variety of inexhaustible energy sources. Strictly speaking, it is a source of energy that will not be exhausted during human life. Renewable energy does not include currently limited energy sources such as fossil fuels and nuclear power.
Most renewable energy is actually solar energy storage. Renewable does not mean providing energy for ten years, but for hundreds or even thousands of years.
How is electricity produced?
Wind power and photovoltaics are new energy sources that China is focusing on strives to develop.The net must be fully absorbedbe and used first. Hydroelectricity also requires priority use of the electricity network during periods of flooding. This is a comprehensive consideration of a series of factors such as environmental protection and the reduction of carbon emissions by the State. The electricity network can therefore do nothing! Why is it called “junk electricity”? There are mainly two aspects.
First, photovoltaic and wind power have low installed capacity and are scattered, making it difficult to meet the peak load regulation needs of the power grid! To put it simply, when the weather is sunny and the wind is blowing, the insufficient thermal power will be supplemented. When short-term electricity demand increases rapidly, photovoltaic and wind power cannot meet it. On cloudy days and when there is no wind, the power plant is dead. In case ofpower outage, thermal energy is used! And the price of new electricity on the network is relatively high! This means that when the sun rises, the heat load is reduced and when the sun sets, the heat load increases. For the power grid, constant adjustments are required, which is not conducive to the safety and economical operation of the power grid. Secondly, wind and photovoltaic power are not stable enough, resulting in the transmission of harmonics to the power grid system, which will increase power losses and affect motor efficiency, which will affect the manufacturing of high precision ! These two reasons should be the reason why photovoltaic and wind energy are called "garbage energy".
Both are new energy production, which are currently encouraged and vigorously developed by the state, and there existshuge state subsidies. , the grid settlement price for thermal power is about 0.3 yuan per kilowatt hour, and the price of wind and photovoltaic power generation ranges from 0.3 to 0.8 yuan.
Both types of electricity generation had a fatal flaw at the time, namely their intermittency. Solar power produced electricity during the day and could not produce electricity at night. Wind power could produce electricity when it was windy. but could not produce electricity when there was no wind. These two types of power generation are actually not well received by the power grid, but due to state support for new energy and requirements for energy saving and emission reduction, the electricity network company must accept them unconditionally.
There are more and more of these two types of electricity productionity, which lead to instability of the electricity network. At present, we mainly rely on thermal energy peak shaving, pumped energy storage, wind energy heating and wind energy heating. building energy storage power plants to solve intermittent problems. At the same time, wind and solar energy forecasts are becoming increasingly accurate, which also reduces pressure on electricity grid regulation.
The atom itself also has a structure consisting of a nucleus and electrons outside the nucleus. Among them, the number of negatively charged electrons is equal to the number of positively charged protons in the nucleus. When two objects rub against each other, part of the electrons will be transferred, which constitutes the phenomenon of electrification by friction. The electricity thus obtained is alsoent called static electricity. When we put on or take off sweaters, we may feel "electricity", which is caused by the recombination and discharge of static electricity. There are many free electrons in the metal wire. When the coil of the metal wire moves in the magnetic field, the electrons are moved by the magnetic field, and voltage and current will be generated in the wire. This is the principle of the generator discovered by. Faraday.