The necessity is that it does not have any rotating mechanical parts, does not consume fuel and does not emit any substances, including greenhouse gases; the necessary condition is that it is not limited by factors such as region and altitude;
The photovoltaic solar power generation process has no rotating mechanical parts, consumes no fuel and emits no substances, including greenhouse gases. It is noise-free and pollution-free. Solar energy resources are not geographic. restrictions and are widely distributed. It is inexhaustible and inexhaustible. Compared with other new power generation technologies, solar photovoltaic power generation has ideal characteristics for sustainable development.
Solar energy is widely distributed on Earth and photovoltaic power generation systems can be used wherever there is electricity.a light, regardless of region, altitude and other factors. The solar photovoltaic power generation process does not require cooling water and can be installed in desolate deserts where there is no water. Photovoltaic power generation can also be easily combined with buildings to form a building-integrated photovoltaic power generation system. It does not require separate land occupation and can save valuable land resources.
1. Photovoltaic energy production has random, intermittent and obvious periodicity characteristics. It cannot be accurately predicted at present and cannot participate in power balance and power generation planning arrangements. Photovoltaic energy production can only be fully consumed by the power grid company after being connectedto the grid in accordance with the requirements of the “Renewable Energy Act”;
2. Photovoltaic power generation only produces electricity during the period. during the day, and the radiation level at night is also zero.
Solar radiation gradually increases after sunrise and reaches its maximum at noon. The production of photovoltaic plants also increases with increasing radiation, and production is maximum at noon
3; . When photovoltaic When the power plant has production, other energy sources in the grid must adjust their production to allow the load to be powered by photovoltaic energy production. Affected by weather conditions, when photovoltaic power output drops rapidly, other conventional power sources need to provide compensation and adjustment of its active output to ensure stable power supply.continuous, reliable and safe electric charge;
4. Photovoltaic power generation Power fluctuations are completely random changes based on weather conditions, which are much faster than normal load changes in the power grid. When the clouds pass, the output of the photovoltaic plant can be quickly reduced by up to 70%. ;
5. Preparation for photovoltaic power generation The adjustable capacity cannot be achieved by temporary start and stop, but is in a rotating standby state. The greater the installed photovoltaic energy production capacity, the greater the spinning reserve prepared for this purpose.
Does solar energy produce electricity through light or heat? If there is almost no sun in the current weather, is it okay to have light? Can I understand that this should not be donethan during the day?
As we all know, solar energy is a clean energy source that is widely used today. Places like Lhasa, China are covered in solar panels that people can use. While everyone is enjoying the comfort and cleanliness that solar energy brings, many scientists have raised questions. Is solar energy really a clean energy source?
When we talk about solar energy, we must mention our tool for obtaining solar energy - the solar panel. There is no doubt that solar panels do not emit greenhouse gases like carbon dioxide when producing electricity. For this reason, those who are concerned about energy consumption and people emitting greenhouse gases, thereby destroying the environment, prefer clean energy sources like solar energy.
But we knows all that silicon is mentioned in high school chemistry textbooks as an important component of solar panels. Manufacturing solar panels itself requires a lot of effort. Solar panels use silicon to absorb and convert sunlight, and melting and purifying silicon in particular requires large amounts of heat. The melting point of silicon is 1,414°C, only 124°C lower than that of iron. Meanwhile, silicon is melted in electric furnaces and most electricity is produced by burning fossil fuels. This means that a large amount of carbon dioxide is emitted during the manufacturing process of solar panels. As a result, some scientists point out that new solar panels already carry a “carbon debt” before they are even put into service. From the point of view of reducing greenhouse gases, it isnecessary to pay off carbon debt before panels become part of the solution (rather than the problem).
Scientists report in Nature Communications that they have calculated the energy needed to make all the solar panels installed worldwide between 1975 and 2015, as well as the carbon dioxide emissions caused by production of this energy. They also looked at the energy generated by installing the panels and the amount of carbon dioxide released into the atmosphere. Although China relies more on fossil fuels to generate electricity, greenhouse gas emissions from manufacturing a panel in China are almost twice as high as in Europe, but this can allow China to save a lot of electricity generated by burning fossil fuels. After comparing the two, it was found that the environmental benefits of instAllation of solar panels in China are higher than those in Europe.
After completing their research, these scientists discovered that currently produced solar panels would emit on average about 20 grams of carbon dioxide per kilowatt hour over their lifetime (regardless of when they have been produced, approximately 30 years). ). This number was 400 to 500 grams in 1975. Likewise, the time required for a solar panel to generate the energy consumed during its manufacture has fallen from around 20 years to two years or even less.
Although emissions of greenhouse gases such as carbon dioxide have been significantly reduced, this does not mean they have been completely eliminated. Some even point out that our use of solar energy should be taxed like other energy sources that emit greenhouse gases. But at the same time, some object that if we worry about everything, we cannot talk about clean energy.
Although there is extensive debate on this issue in society, the editor believes that we do not need to worry too much about these so-called greenhouse gases generated during the manufacturing process, but that we should focus on the economic benefits. provided by these clean energy sources. After all, as global technology advances, we will certainly reduce greenhouse gas emissions and make our planet cleaner.
Theoretically, the working principle of solar energy is a device that directly converts light energy into electrical energy through the photoelectric effect or photochemical effect. When sunlight hits a semiconductor, some of it is reflected from the surface and the rest is absorbed or transmitted by the semiconductor. Of course, part of the absorbed light is transformed into heat andOther photons collide with the valence electrons of the atoms that make up the semiconductor, thus generating electron-hole pairs. In this way, the light energy is produced in the form of electron-hole pairs and is converted into electrical energy.
So you can use other lights instead of sunlight