No radiation
Photovoltaic power generation converts light energy directly into DC power through the characteristics of semiconductors, and then converts DC power into AC power that can be used by us through an inverter.
The photovoltaic system is composed of photovoltaic components, brackets, DC cables, inverters, AC cables, power distribution cabinets, transformers, etc. The brackets are not charged and naturally no electromagnetic radiation will be generated. Photovoltaic modules and DC cables have DC current inside, and there is no change in direction. They can only generate electric fields, not magnetic fields.
Although the output transformer is alternating current, the frequency is very low, only 50 Hz, and the magnetic field generated is very low. Inverter is a device that converts direct current to alternating current. There is power electronic conversion inside, and the frequency is generally 5-20KHz, so it will generate an alternating electric field, so it will also generate electromagnetic radiation. The country has strict standards for the electromagnetic compatibility of photovoltaic inverters.
Compared with household appliances, the electromagnetic radiation of photovoltaic inverters is about the same as that of notebook computers, and lower than induction cookers, hair dryers, and refrigerators.
Therefore, the construction of photovoltaic power plants will not only cause harm to human health, but also provide the earth with green and clean high-quality energy, which is the future energy development direction of mankind.
The manufacturing process is not "high energy consumption"
I don’t know how many people slander that photovoltaic power generation is high pollution and high energy consumption in the manufacturing process. Such rumors have spread more than once.
The photovoltaic manufacturing industry mainly includes four links: crystalline silicon purification, silicon ingots and wafers, photovoltaic cells and photovoltaic modules. Among them, the purification of crystalline silicon needs to be completed under high temperature conditions and consumes a lot of electric energy, accounting for about 56%-72% of the total energy consumption. It is the most important chemical production process in the industry chain; and the "high pollution" comes from high-purity polysilicon By-products produced in production.
Crystalline silicon purification is indeed a large-scale, high-energy-consuming industry. However, this does not mean that photovoltaic products have high energy consumption. It is necessary to convert the total energy consumed in the production of a unit of photovoltaic modules into electricity consumption and compare it with the power generation capacity of the modules during their lifetime. In 2015, the Ministry of Industry and Information Technology issued the "Specification Conditions for the Photovoltaic Manufacturing Industry", stipulating that the power consumption of the polysilicon production process must be less than 120 kWh/kg; new construction and expansion projects must be less than 100 kWh/kg, and this energy consumption level should be relatively close to the current level The world's advanced level.
Based on this conversion, the photovoltaic power consumption that meets the national regulations requires 0.6-1.2 kilowatt-hours of electricity to produce one watt of photovoltaic modules. Based on the 25-year life span of photovoltaic modules, photovoltaic power generation is far greater than production power consumption.
No light pollution
Light pollution is threatening people's health. In daily life, people's common light pollution is mostly the dizziness of pedestrians and drivers caused by the reflection of mirrored buildings, and the discomfort caused by unreasonable lighting at night to the human body.
So everyone is very worried about whether there is light pollution in the installation of photovoltaic modules. In fact, the visible light reflection coefficient of ordinary tempered glass is 9%~11%, which will not cause light pollution. The photovoltaic module uses the same type of glass as the building, and it will not cause light pollution.
The source of light pollution is visible light. The power generation unit cells inside the photovoltaic module will absorb visible light and convert it into electrical energy, which will further reduce the reflection of visible light.
And with technological innovation, many photovoltaic building materials can now be made into frosted surfaces, which can reduce the reflection of visible light.
No noise, no emissions
These two points are relatively easy to understand. Photovoltaic power generation is the conversion of solar energy into electric energy. It is a photoelectric conversion. There will be no noise or pollution emissions during the process. It is very suitable for installation on residential and industrial and commercial rooftops.
In recent years, distributed photovoltaics have developed rapidly, and most of them are fancy photovoltaic power generation is suitable for installation on the roof, has the function of energy saving and emission reduction, and can also be insulated and waterproof.
Many factories and residents have installed photovoltaic power stations on the roofs. We can actually experience the noise-free and emission-free power generation process.
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