How Much Energy does the Sun Generate?

The sun is the nearest star to the earth and the only luminous celestial body in the solar system. It brings light and heat to the earth and is the source of all life on the earth. The sun delivers energy to the earth's surface by means of light radiation. Solar energy belongs to renewable green energy and is an "inexhaustible" energy source. Under standard solar light conditions during the day, the power generation efficiency is 10%. The annual solar power generation on the entire surface of the earth is 114 × 1015 kWh, about It is equivalent to 100 times the total energy consumption in the world today. ^[1]

The ancients knew early on

In my country,

Due to agglomeration

Researchers at East China Normal University have successfully used nanomaterials to "rebuild" chloroplasts in the laboratory to achieve photovoltaic power generation at extremely low cost.

Chloroplasts are places where plants carry out photosynthesis and can effectively convert sunlight into chemical energy. The research team did not "copy" a chloroplast outside the plant, but developed a new type of battery similar to the chloroplast structure-dye-sensitized solar cells, and tried to convert light energy into electricity. With the support of the Shanghai Nanometer Special Fund, after more than 3 years of experiments and explorations, the photoelectric conversion efficiency of this bionic solar cell has exceeded 10%, which is close to the world's highest level of 11%.

As the third generation of solar cells, the biggest attraction of dye-sensitized cells lies in cheap raw materials and simple manufacturing processes. It is estimated that the cost of a dye-sensitized battery is only 1/10 of that of a silicon battery panel. At the same time, it does not require high lighting conditions. Even in a room with insufficient sunlight, its photoelectric conversion rate will not be greatly affected. In addition, it has many interesting uses. For example, using plastic instead of glass plywood can make a flexible and flexible battery; when it is made into a display, it can generate electricity and emit light while achieving self-sufficiency in energy.

Solar energy is a clean and sustainable energy source. The development of solar technology can reduce the use of fossil fuels in power generation, thereby reducing air pollution and global warming. Solar cells are used to convert the energy contained in sunlight into electrical energy through photoelectric conversion. Solar water heaters are used to heat water using solar heat, and hot water is used to generate electricity, and solar energy is used for desalination. At present, the use of solar energy is not very popular. There are still problems of high cost and low conversion efficiency when using solar power, but solar cells have been applied in providing energy for artificial satellites.