The sun's energy comes from the nuclear fusion reaction that occurs inside it.
At the core of the Sun, hydrogen nuclei undergo fusion reactions at extremely high temperatures and pressures to generate helium nuclei and release energy. This process is called nuclear fusion.
The nuclear fusion reaction is the main source of the enormous energy that the sun continues to emit. Inside the sun, hydrogen nuclei collide and fuse into helium nuclei. The mass lost during this process is converted into energy and released. This energy is transferred to the surface of the sun in the form of radiation and is emitted into the solar system, including Earth, in the form of light and heat.
The energy production of the sun has a significant impact on the environment and the terrestrial ecosystem. Once the radiation of solar energy hasreaches the Earth, it is absorbed and reflected by the Earth's atmosphere and surface, thus forming the Earth's climate and ecological environment. Stable solar energy production plays a critical role in maintaining the stability of Earth's climate and ecosystems.
The sun's energy is also widely used by humans, notably for the production of electricity, heating, maritime transport, agriculture and the management of water resources. Solar energy is a clean and renewable energy that is of great importance in reducing dependence on fossil fuels and reducing environmental pollution.
Characteristics of solar energy:
1. Infinite: The sun's energy source is infinite. As long as the sun burns, it will. continue to burn. This infinity makes solar energy a reliable long-term energy source.
2. Environmental protection: energye solar is an environmentally friendly energy source that does not produce harmful waste gases, waste water, etc., nor does it cause environmental pollution. The use of solar energy helps reduce damage to the environment and protect the ecological balance.
3. High efficiency: Solar energy has high energy density and high energy conversion efficiency compared to other energy sources. Under the same conditions, solar energy production is superior to traditional electricity production methods.
4. Convenience: Solar energy is a ubiquitously available energy source and does not require complex transportation and storage facilities. The installation and use of solar equipment is also relatively simple, convenient and quick.
5. Dependency: The use of solar energy is affected by factors such as lgeographical location, climatic conditions and weather. If the geographical location is not good or the climatic conditions are unfavorable, solar energy production. will be affected.
What are the advantages and disadvantages of solar energy
Disadvantages of solar energy
1. Dispersion: The total amount of solar radiation reaching the ground. surface of the earth. Very large, but the energy flow density is very low. On average, on the Tropic of Cancer, when the weather is relatively clear in summer, the irradiance of solar radiation is high at noon, and the average solar energy received on an area of 1 square meter perpendicular to the direction of light solar is around 1000W if calculated over the whole year. On average day and night, it's only about 200W. In winter it is only about half, and on cloudy days it is usually only about 1/5. This energy flow densitygie is very low. Therefore, when also using solar energy, if we want to obtain a certain conversion power, we often need a set of collection and conversion equipment with a considerable area , which is expensive.
2. Instability: Due to the limitations of natural conditions such as day and night, season, geographical latitude and altitude, as well as the influence of random factors such as clear, cloudy, cloudy, rain, etc. ., the time required to reach a certain ground Solar irradiation is both intermittent and extremely unstable, making large-scale application of solar energy more difficult. In order to make solar energy a continuous and stable energy source and ultimately become an alternative energy source that can compete with conventional energy sources, the problem of energy storage must be bwell solved, that is, the energy of solar radiation during clear days should be stored as much as possible for use at night or on rainy days. It is used for everyday use, but currently energy storage is also one of the weakest links in solar energy use.
3. Low efficiency and high cost: At the current level of development of solar energy use, some aspects are theoretically feasible and technically mature. However, some devices using solar energy have low efficiency and high cost. Generally speaking, the economy cannot compete with conventional energy sources. For a considerable period, the future development of the use of solar energy will be limited mainly by economic reasons.
Advantages (1) Universal: the sun shines on the earth and there are no geographical restrictions, whether on land or sea, on the mountains or on the islands. It can be directly developed and used without restriction. the need for mining and transportation. (2) Harmless: The development and use of solar energy will not pollute the environment. It is one of the cleanest sources of energy, which is extremely valuable today as environmental pollution becomes more and more serious. (3) Huge: The energy of solar radiation reaching the Earth's surface each year is equivalent to about 130 trillion tons of coal, and its total amount constitutes the largest energy that can be developed in the world today. (4) Long term: Based on the current rate of nuclear energy generated by the sun, the storage of hydrogen is enough to last for tens of billions of years, and life on earth is also about billions of years. we can say that the energy of the groundIt is used in an inexhaustible way.
Disadvantages
(1) Dispersion: Although the total amount of solar radiation reaching the Earth's surface is large, the density of the energy flux is very low. On average, near the Tropic of Cancer, when the weather is relatively clear in summer, the irradiance of solar radiation is greatest at noon. The average solar energy received in an area of 1 square meter perpendicular to the direction of sunlight is approx. 1000W if total averaged day and night throughout the year, that's only about 200W. In winter it is only about half, and on cloudy days it is usually only about 1/5. This energy flow density is very low. Therefore, when using solar energy, if we want to obtain a certain conversion power, we often need a set of collection and conversion equipment with a considerable area, which Eastexpensive. (2) Instability: due to the limitations of natural conditions such as day and night, season, geographic latitude and altitude, as well as the influence of random factors such as clear weather, cloudy weather, clouds and rain, solar irradiation reaches a certain level. Some soils are intermittent and extremely unstable, making large-scale application of solar energy more difficult. For solar energy to become a continuous and stable energy source, and ultimately an alternative energy source capable of competing with conventional energy sources, it mustA good solution to the energy storage problem is to store as much as much energy as possible from solar radiation on a clear day to use it at night or on rainy days. However, energy storage is currently also one of the weakest links in the use of solar energy. (3) Low efficiency and high cost: At nAt the current level of development of the use of solar energy, certain aspects are theoretically feasible and technically mature. However, some devices using solar energy have low efficiency and high cost. Generally speaking, the economy cannot compete with conventional energy sources. For a considerable period, the future development of the use of solar energy will be limited mainly by economic reasons.