The sun is a flaming ball of fire. It constantly radiates enormous energy to the environment, averaging 3.865 × 1,026 joules per second, which is equivalent to burning 1.32 × 1,016 standard tons of coal per second. Although the energy received by the Earth is only one 2.2 billionth of that, the energy obtained reaches 800,000 kilowatts, equivalent to 6 million standard tons of coal per second, which is equivalent at 28,000 times the total commercial energy consumed by humans worldwide. a year. If 0.1% of the solar energy on the Earth's surface is converted into electrical energy, with a conversion rate of 5%, the annual electricity production can reach 5.6 × 1012 degrees, which is equivalent to 40 times the current energy consumption in the world. If we collect all the solar energy falling on Earth, it only takes about 50 minutes to collect enough energy for people around the world to be able tothey consume it for a year.
Solar Power Generation: According to Einstein's theory of relativity, mass is converted into energy through thermonuclear reactions, and the formula is: E=mc2. At the center of the sun, the temperature is 15 million degrees and the pressure is 400 billion times higher than Earth's atmospheric pressure. Under such high temperature and pressure, thermonuclear reactions can continue without problem. Because the sun is an extremely powerful celestial body. large mass, depending on the current The consumption rate is sufficient to maintain 6×1010 years.
When you study electrical engineering, you learn about strong electricity, but modern strong electricity and weak electricity cannot be completely separated. They penetrate each other, and there are intermediate subjects, like power electronics, so don't hesitate. I am not content to point out that they appearhold to strong electricity, to weak electricity.
Learning must be emphasized and supplemented.
Solar energy, as a type of energy, can be used for both strong electricity and weak electricity. It is also a development trend of energy in the future. It will be useful if you learn it. As for whether you should study "Physical and Chemical Molecular Sciences", it depends on what you do. If you only apply photovoltaic cells, there is no need to study "Physical and Chemical Molecular Sciences" in depth.