Does photovoltaic power generation have radiation?
Solar photovoltaic power plant has no radiation
Photovoltaic power generation is the direct conversion of light energy into direct current energy through the characteristics of semiconductors, and then through the inverter to convert the direct current into alternating current that can be used by us.
The PV system is composed of PV modules, brackets, DC cables, inverters, AC cables, distribution cabinets, transformers, etc. The brackets are not electrically charged and naturally do not produce electromagnetic radiation. PV modules and DC cables, which are DC currents with no change in direction, can only produce electric fields, not magnetic fields.
The output transformer is AC, but the frequency is very low, only 50Hz, and the magnetic field produced is very low. The inverter is a device that converts DC power into AC power, and there is power electronic transformation inside, and the frequency is usually 5-20KHz, so it will produce alternating electric field, so it will also produce electromagnetic radiation. There are strict national standards for the electromagnetic compatibility of PV inverters.
The electromagnetic radiation of PV inverter, compared with household appliances, is about the same as that of a laptop computer and lower than that of an induction cooker, hair dryer and refrigerator.
Therefore, the construction of photovoltaic power plants will not only not be harmful to human health, but also can provide the earth with green and clean quality energy, which is the future direction of human energy development.
Is manufacturing solar panels a high energy consumption industry?
The manufacturing process is not "high energy consumption"
I do not know how many people slander that photovoltaic power generation is high pollution, the manufacturing process of high energy consumption, such a rumor more than once spread.
Photovoltaic manufacturing industry mainly includes four links: crystal silicon purification, silicon ingots, photovoltaic cells and photovoltaic modules. Among them, crystal silicon purification needs to be completed under high temperature conditions, requiring a large amount of electricity consumption, accounting for about 56%-72% of the total energy consumption, is the most important chemical production process in the industry chain; and "high pollution" from the production of high-purity polysilicon by-products.
Silicon purification is indeed a large-scale, high-energy-consuming industry. However, this is not the same as PV products is high energy consumption, the need to convert the total energy consumed in the production of a unit of photovoltaic modules into electricity consumption, and with the full life of the module power generation for comparison. 2015 Ministry of Industry and Information Technology issued the "photovoltaic manufacturing industry specification conditions", polysilicon production process power consumption shall be less than 120 kWh / kg; new and expansion projects shall be less than 100 kWh / kg, this energy consumption This energy consumption level should be closer to the current world advanced level.
With this conversion, in line with national regulations of photovoltaic power consumption, the production of a watt of photovoltaic modules need 0.6-1.2 degrees of electricity. According to the 25-year life of PV modules, the power generation of PV is much larger than the production of electricity consumption.
Is there luminous pollution from PV power plants?
There is no light pollution
Light pollution is threatening people's health. In daily life, people's common condition of light pollution is mostly the dizziness of pedestrians and drivers caused by the reflection of mirrored buildings, and the discomfort caused by unreasonable lights to human body at night.
So people are very worried about whether there is light pollution from the installation of photovoltaic modules. In fact, the visible light reflection coefficient of ordinary tempered glass is 9% to 11%, which will not cause light pollution, and the photovoltaic modules use the same type of glass as the building, which also will not cause light pollution.
The source of light pollution is visible light, photovoltaic module internal power generation unit cells will absorb visible light will be converted into electricity, will further reduce the reflection of visible light.
And with technological innovation, many photovoltaic building materials can now be made into frosted surface, more reduce the reflection of visible light.
Is there any noise from PV power plant? Is there any pollution emission?
No noise, no emissions
These two points are relatively well understood, photovoltaic power generation is the conversion of solar energy into electricity, is photoelectric conversion, the process will not produce noise, there will be no pollution emissions, very suitable for installation in residential and commercial and industrial rooftops.
Distributed photovoltaic hot development in recent years, most of them are also suitable for installation in the roof, with energy-saving and emission reduction function, but also heat insulation and waterproof.
Many factories and residential rooftops are installed photovoltaic power plants, we can actually feel no noise, no emissions of the power generation process.