Effects of solar energy
1. Can be used to maintain health
Sunbathing refers to the method of using the sun to irradiate the human body to treat illnesses and promote physical and mental recovery. It is also called “sun therapy”. When sunbathing, the human body will not only be affected by infrared, visible light and ultraviolet contained in the sun, but also by air temperature, humidity and other weather factors. .
Consequently, the impact of sunbathing on health is multifaceted. Research shows that moderate exposure to sunlight can dilate blood vessels in the skin, promote metabolism, improve skin function, and make skin healthy.
2. It can be used to produce electricity
Solar energy is “inexhaustible” and can be considered one of the most powerful sources of energy.abundant in nature. Efficient use of solar energy is also the key to solving energy problems. At present, the development and utilization of solar energy by human beings still suffers from many disadvantages such as low efficiency, scattered radiation and unstable energy storage.
The ideal photothermal solar fuel will enable reversible energy conversion and storage within a single material system, with the advantages of zero emissions, easy transport, recyclability, renewable nature and release on demand in the form of heat. . Solar thermal fuel has therefore become an important target for scientists around the world.
3. Variable solar fuel
The reason why green leaves can photosynthesize and turn carbon dioxide in the air into oxygen depends on two key pointsés. One concerns the two molecules present in the air. The leaves absorb sunlight and secondly, two catalysts convert the sunlight. The equipment they developed simulates green leaves, relies on silicon to absorb solar energy, and then two synthesized catalysts to convert the solar energy.
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Disadvantages of the solar energy industry
The decline in international energy prices has had a serious impact on new energies. industries such as solar energy. The higher the price of traditional energy, the greater the space for the development of new energies. At present, due to the superposition of many negative factors such as the continued weakness of global crude oil demand and the shale revolution, new energy industries such as solar energy are going through a crisis.very difficult period.
Second, the previous development model of the solar power industry is unsustainable. Affected by the rising prices of traditional energy sources such as oil, natural gas and coal, the new energy industry has become increasingly popular around the world in recent years. Among them, the solar power industry has not only developed relatively quickly, but also expanded. also reached overheating. After more than 20 years of development, the solar power industry has entered a period of reshuffle, and the pace of survival of the fittest continues to accelerate.
Faced with fierce competition in solar photovoltaic products, polysilicon production is located upstream of the solar industry. Faced with the cold winter of the solar industry, the demand for polysilicon from photovoltaic manufacturers around the worlder is relatively weak.
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< /p>How to calculate the solar energy utilization rate
3. Light energy utilization rate
3.1 Concept
In a certain period of time, the amount of crops per unit area The ratio between the accumulated chemical potential and the solar radiation energy invested simultaneously in the area
3.2. Factors affecting the use of light energy
First, the plants are short and the ground cover rate is low in the early stages of growth ofs cultures. Most of the solar radiation escapes to the ground and is lost. Second, the external environment limits the improvement of the environmental capabilities of cultures. Insufficient supply of carbon dioxide to agricultural land, low temperatures in the early and late stages of crop growth, deficit and excess of water supply, insufficient supply of nutrients and other adverse environmental factors can limit the effect of light energy. Third, the population structure of crops is unreasonable, resulting in irrational distribution of light within the population, which limits the increase in light and intensity of the population. When the leaf area index is too large, most of the lower pages of the population do not receive enough light, the light accumulation is low, and respiration consumes a lot.When the leaf area index is too small, the population exhibits severe light leakage. At the same time, leaf illumination exceeds the light saturation point and light energy is wasted. Simply unreasonable light distribution can cause the light intensity of the upper leaves to exceed the saturation point and be wasted, while the light intensity of the lower leaves is seriously insufficient. Fourth, the genetic characteristics of crops limit photosynthetic capacity. The light efficiency of crops such as barley, rice and soybeans is generally lower than that of crops such as corn and sorghum. This characteristic is particularly evident in conditions of high temperature, strong light and drought. In addition, dwarf varieties with erect leaves and varieties with high stress resistance have a beneficial use.higher light energy than varieties with loose leaves and low stress resistance. Fifth, agrometeorological disasters, diseases and insect pests can lead to reduced crop yield and affect the use of light energy.