Including solar energy, biomass energy, wind energy, geothermal energy, wave energy, ocean current energy and tidal energy, as well as thermal circulation between the ocean surface and deep layers, etc.
1. Solar Energy
Solar energy generally refers to the radiant energy of sunlight. The main forms of solar energy utilization include photothermal conversion, photoelectric conversion and photochemical conversion of solar energy. Solar energy in the broad sense is the source of many energies on earth, such as wind energy, chemical energy, potential energy of water and other forms of energy generated or converted by the solar energy.
2. Ocean Energy
Ocean energy refers to various renewable energy sources contained in seawater, including tidal energy,wave energy, ocean current energy, seawater temperature difference energy and seawater salinity difference. Can wait. 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.
3. Wind energy
Wind energy is formed by the flow of solar radiation. Compared with other energy sources, wind energy has obvious advantages: it has large reserves, 10 times those of hydropower, is widely distributed and will never be exhausted. It is particularly important for islands and remote areas where transportation is inconvenient and far away. the main electricity network. The most common form of wind energy use is wind power generation. There are two ideasfor wind power generation, horizontal axis wind turbines and vertical axis wind turbines. Horizontal axis fans are widely used and are the common models for wind power generation.
4. Biomass energy
Biomass energy comes from biomass. It is also a form of energy stored in living things in the form of chemical energy from solar energy. of photosynthesis in plants. Biomass energy is stored solar energy and the only renewable carbon source that can be converted into conventional solid, liquid or gas fuels. Biomass energy resources are relatively abundant on earth and provide a harmless source of energy.
5. Geothermal energy
The Earth's internal heat source may come from energy released by gravitational differentiation, tidal friction, chemical reactionsics and the disintegration of radioactive elements. Radioactive thermal energy is the Earth's primary source of heat. China is rich in geothermal resources and widely distributed. There are 5,500 geothermal hotspots and 45 geothermal fields. Total geothermal resources amount to approximately 3.2 million megawatts.
Geothermal energy is a renewable energy source. Renewable energy refers to an energy source that can be continuously used and recycled in nature, such as solar energy, wind energy, hydropower, and biomass energy, ocean energy, tidal energy, geothermal energy, etc.
Geothermal energy
Meaning
Geothermal energy is the natural thermal energy extracted from Earth's crust. This energy comes from molten rock inside the earth and exists in the formand heat. This is the energy that causes volcanic eruptions and earthquakes.
The temperature inside the Earth reaches 7,000°C, and at a depth of 80 to 100 kilometers, the temperature drops to between 650 and 1,200°C. through groundwaterFlows and lava surge toward the crust between 1 and 5 kilometers above the surface, allowing heat to be transferred closer to the surface. Hot lava heats nearby groundwater and the heated water eventually seeps out of the ground.
Sustainability
Typical lifespans of magmatic/volcanic geothermal activity range from a minimum of 5,000 years to over a million of years. This long lifespan makes geothermal energy a renewable energy source. Additionally, the natural replenishment rate of geothermal reservoirs varies from a few megawatts to more than 1,000 megawatts (heat).
The first time that the humMany people used geothermal water to generate electricity, it was in Tuscany, Italy in 1904. In 1958, the North Island of New Zealand began generating electricity from geothermal sources (212 MW in 2013); The Geyser Hot Field in California, United States, began generating electricity in 1960, with an output of 1,300 MW. It is clear that geothermal resources can operate reliably, safely and sustainably.
The sustainability of geothermal production can also be judged from the heat source present in the heat reservoir rocks (containing 85 to 95% of the heat). In the Fountain Hot Field in California, the heat content is conservatively estimated to be at least equivalent to the energy obtained from burning 28 billion barrels of oil or 6.2 billion short tons (1 shortton = 907 kilograms) of coal.
Renewable energy and non-renewable energyRenewable energy
Primary energy that has self-regenerative characteristics and can be used sustainably. Including solar energy, hydropower, biomass energy, hydrogen energy, wind energy, wave energy and thermal circulation between the ocean surface and deep layers, etc. Geothermal energy can also be considered renewable energy.
Non-renewable energy
Generally refers to energy resources that cannot be renewable at this point after human development and use, called “non-renewable energy”. . For example, coal and oil are the remains of ancient organisms that were buried deep underground and formed after a long process of evolution (which is why they are also called "fossil fuels"). Once burned and consumed, theycannot be burned for hundreds, or even hundreds. decades. It regenerates in ten thousand years, so it is a “non-renewable energy source”. Additionally, non-renewable energy sources include coal, oil, natural gas, nuclear power, and oil shale.