What does solar energy do, and what does solar energy do

Solar energy has a broad and narrow sense: solar energy in the narrow sense refers to the solar radiation that can be directly used and converted by modern technology; In addition to solar energy in the narrow sense, solar energy in the broad sense also includes the amount of solar energy that is indirectly obtained, such as the atmospheric flow caused by solar radiation - wind energy, ancient plants forming coal, etc.

Everyday solar energy refers to solar energy in a narrow sense. Solar energy is an inexhaustible green new energy, with the rapid development of China's national economy, solar energy is more and more widely used, it mainly has the following ways to utilize:

Solar thermal power generation: It mainly gathers the sun's energy together and heats it to drive a steam turbine to generate electricity.

Solar photovoltaic power generation: Solar cells are combined together in any size and scale. It can be used for independent power generation or grid-connected power generation.

Solar water pump: It is replacing the solar thermal power water pump, and the 2 5kw photovoltaic water pump developed by China in the nineties is used in Xinjiang.

Solar water heater: Since the first water heater was developed in 1958, after more than 40 years of efforts, the production and sales of solar water heaters in China have ranked first in the world.

Solar buildings: There are three forms of solar buildings, namely passive type: simple structure, low cost, and natural heat exchange to obtain energy; Active:

The structure is more complex, the cost is higher, and electricity is needed as auxiliary energy; "Zero-energy building": the structure is complex, the cost is high, and the energy required for all the buildings is provided by the "solar roof".

Solar drying: After the 70s of the last century, solar dryers developed rapidly, especially in rural areas, and solar drying experiments were carried out on many agricultural and sideline products.

Solar cooker: Solar cooker can be divided into two categories: hot box type and concentrating type, and China is the country with the most popular application of solar cooker in the world.

Solar refrigeration and air conditioning: It is an energy-saving green air conditioner, no noise, no pollution, and can be put into commercial production quickly.

Other uses of solar energy: it can desalinate seawater, use sunlight to catalyze the environment, cultivate energy plants, and have a wide range of applications in communications, transportation, agriculture, disaster prevention, cathodic protection, consumption, electronic products and many other aspects.

Solar energy is the energy produced by the continuous process of nuclear fusion reactions inside the sun. The average solar radiation intensity in Earth's orbit is 1367 kW m2. The circumference of the Earth's equator is 40,000 km, which allows it to be calculated that the Earth can gain up to 173,000 TW of energy.

The standard peak intensity at sea level is 1kw m2, and the average annual radiation intensity of a certain point on the earth's surface for 24h is equivalent to 102,000tw of energy, which human beings depend on for survival, including all other forms of renewable energy (except geothermal energy resources) Although the total amount of solar energy resources is equivalent to more than 10,000 times the energy used by human beings now, the energy density of solar energy is low, and it varies from place to place and from time to time, which is the main problem facing the development and utilization of solar energy. These characteristics of solar energy will limit its role in the overall integrated energy system.

The sun is a huge, ancient, endless source of energy. Although the energy radiated by the Sun into the Earth's atmosphere is only 1/2.2 billion of its total radiant energy (about 1/2.2 billion, it is already 173,000 TW, which means that the Sun hits the Earth with the equivalent of 5 million tons of coal per second). The diagram below is a diagram of energy flow on Earth.

As can be seen from the figure, the earth's wind energy, water energy, ocean temperature difference energy, wave energy, biomass energy and some tidal energy are all higher than the sun; Even the fossil fuels on the earth (such as coal, oil, natural gas, etc.) are fundamentally solar energy stored since ancient times, so the scope of solar energy in the broad sense is very large, and solar energy in the narrow sense is limited to the direct conversion of solar radiation energy into photothermal, photoelectric and photochemical.

Solar energy is both a primary and a renewable energy source. It is rich in resources, free to use, and does not require transportation, and does not pollute the environment in any way. But solar energy also has two major drawbacks:

First, the energy flow density is low; Second, its intensity is affected by various factors (season, location, climate, etc.) and cannot be maintained constantly. These two major disadvantages greatly limit the efficient use of solar energy.

Humans have a long history of harnessing solar energy. As early as the Warring States Period more than 2,000 years ago, China knew that the use of steel four-sided mirrors focused on sunlight to ignite fire; Solar energy is used to dry agricultural and sideline products. In modern times, the utilization of solar energy has become more and more extensive, including the photothermal utilization of solar energy, the photoelectric utilization of solar energy and the photochemical utilization of solar energy.

Solar energy in the narrow sense refers to the solar radiation that can be directly used and converted by modern technology.

At present, solar energy has the following nine uses in production and life: 1. Solar power generation. It mainly gathers the sun's energy together and heats it to drive the steam turbine to generate electricity; 2. Solar photovoltaic power generation.

Combine solar cells in any size and scale; 3. Solar water pump. is replacing solar thermal power pumps; 4. Solar water heater.

5. Solar buildings. There are three main forms: passive, active and "zero-energy buildings"; 6. Solar drying.

It is used for drying many agricultural and sideline products; 7. A solar cooker. It can be divided into two types: hot box type and concentrating type; 8. Solar refrigeration and air conditioning. This is an energy-saving green air conditioner, no noise and no pollution; 9. Desalinate seawater.

Governance of the environment and other purposes.

Summary. Solar energy is a very environmentally friendly and clean energy source, and the use of solar energy brings a variety of benefits, including:1

Environmental protection: The solar power generation process will not produce any pollutants, reducing the pollution to the environment. 2.

Energy saving: Solar energy is a renewable energy source, and the use of solar energy can reduce dependence on traditional energy sources and save energy. 3.

Sustainability: Solar energy is a sustainable energy source that can be obtained every day. 5.

Wide range of applications: Solar energy can be used for power generation, heating, hot water and lighting, etc., with a wide range of applications, and can adapt to different environmental and climatic conditions. 6.

Independence: Solar power generation can achieve independent power supply and does not need to rely on external power grids, which is more flexible and convenient. To sum up, solar energy has many advantages such as environmental protection, energy saving, economy, sustainability, wide range of application and independence, and is a very good clean energy.

Solar energy is a very environmentally friendly and clean energy source, and the use of solar energy brings a variety of benefits, including:1Eco-friendly:

The solar power generation process does not produce any pollutants, reducing the pollution to the environment. 2.Energy Saving:

Solar energy is a renewable energy source, and the use of solar mass rolling energy can reduce dependence on traditional energy sources and save energy. 3.Affordable:

Solar energy is a continuous energy source that can be obtained every day. 5.Wide range of applications:

Solar energy can be used for power generation, heating, hot water, and lighting, among other things, in a wide range of applications, and can adapt to different environmental and climatic conditions. 6.Independence:

Solar power generation can achieve independent power supply, without relying on the external power grid, which is more flexible and convenient. To sum up, solar energy has many advantages such as environmental protection, energy saving, economy, sustainability, wide range of application and independence, and is a very good clean energy.

Solar energy is a renewable energy source that refers to the energy obtained from solar radiation. Solar energy can be converted into electricity or heat to meet human energy needs. The solar panel is a device that converts solar radiation directly into electrical energy, and it is composed of multiple solar cells.

Solar thermal energy harvesting systems convert solar radiation into heat, which is usually used to heat water or houses. Compared with traditional fossil fuels, solar energy is very polluting and is a renewable energy source, so the future development is promising. However, at present, the cost of solar energy is still high, and it is necessary to continuously improve the technology and reduce the cost in order to widely promote the use of Dashouxiang.

Solar power generation: Solar energy is stored together and cooled to drive a steam turbine to generate electricity. Solar water heaters.

Converts solar energy into heat and water from low temperature to high temperature. Solar cooker: It is mainly divided into two types: hot box type and concentrating type, which can save gas resources. Solar water pump: In remote areas where electricity is scarce, solar water pump water supply is an ideal green energy system.

1. Use solar power generation: Solar energy is accumulated together and cooled to drive the steam turbine to generate electricity.

2. Solar water heater: converts solar energy into heat energy, and changes water from low temperature cooling to high temperature.

3. Solar cooker: It is mainly divided into two types: hot box type and concentrating type, which can save gas resources.

4. Solar water pump: In remote areas where there is no electricity, solar water pump is an ideal green energy system integrating economy, reliability and environmental benefits.

5. Solar heater air conditioner: It is an energy-saving and environmentally friendly green air conditioner.

6. Solar photovoltaic power generation.

It can be grouped together, and the scale can be changed at will, and the application range is wider.

The benefits of solar energy are renewable, environmentally friendly and pollution-free.

1. Renewability

Solar energy is a renewable energy source, and the ** of sunlight is endless. Compared to the limited amount of fossil fuels such as coal, oil and gas, solar energy has unlimited potential. The photovoltaic power generation system can use solar energy to convert into electricity, thereby reducing the dependence on traditional energy sources and achieving sustainable energy development.

2. Environmental protection and pollution-free

There are almost no pollutant emissions from the solar power generation process. Compared to greenhouse gases such as carbon dioxide and air and water pollution from burning fossil fuels, solar power is a clean, environmentally friendly energy option. It has less negative impact on the environment and is effective in reducing greenhouse gas emissions, improving air quality and protecting ecosystems.

Disadvantages of solar energy

1. 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 sunshine, cloud, cloud, rain, etc., the solar irradiance reaching a certain ground is both intermittent and extremely unstable, which increases the difficulty of large-scale application of solar energy.

In order to make solar energy a continuous and stable energy source, and thus eventually become an alternative energy source that can compete with conventional energy, it is necessary to solve the problem of energy storage, that is, to store the solar radiation energy in the clear day as much as possible for use at night or on rainy days, but at present, energy storage is also one of the weaker links in the utilization of solar energy.

2. Low efficiency and high cost: At the current development level of solar energy utilization, some aspects are theoretically feasible and technically mature. However, some solar energy is used to install compass, because of the low efficiency, high cost, in general, the economy can not compete with conventional energy.

For a considerable period of time in the future, the further development of solar energy utilization will be mainly constrained by economic constraints.