What do you think of the news that "manufacturing photovoltaic modules consumes a lot of energy"?
"During the production of photovoltaic modules, a lot of heat will be generated due to the contact between photovoltaic modules and the environment during the manufacturing process. Therefore, the heat generated during the production of photovoltaic modules will also have an impact on the environment." This is "Operation and Maintenance Services for Photovoltaic Power Plants in China" Business" in a news release on April 16. The reporter saw in the "Press Release of China Photovoltaic Power Plant Operation and Maintenance Service Providers", "For photovoltaic power generation, the heat generated at present mainly comes from the power grid. When producing photovoltaic cell modules, the solar panels are welded and cut. , After welding, a lot of heat is generated, but this heat hardly enters the grid and circulates. That is to say, there is no difference between the heat generated by current solar power generation and photovoltaic panels.” This news also seems incredible at first glance. .
1. What does a press release mean?
The press release is the news released by the relevant department and the news within the enterprise. It is a written material for the company to release news to the outside world. It is generally prepared and organized in advance, and the content is relatively long. The manuscript is long and the text is relatively simple. Generally speaking, press releases are organized by reporters before they are officially released. There are generally some basic content on the manuscript, which can be viewed on the official website after the manuscript is published.
2. Is the heat generated during the production of photovoltaic cell modules not considered energy consumption?
If so, is the heat generated in the production of photovoltaic cell modules not considered energy? In fact, the heat in the production of photovoltaic cell modules is not actually energy, but "energy". In authoritative documents such as "Key Technologies and Equipment of Solar Photovoltaic Power Generation System", it is described in this way: "At present, the photovoltaic power generation system mainly includes the following key equipment: solar cell components, solar cell photoelectric converters, backplane materials, tracking lines In addition, the reporter also saw, "According to the authoritative documents such as the national "Key Technologies and Equipment of Solar Photovoltaic Power Generation System", the welding process and junction box and other parts materials currently used by first-line manufacturers in my country's photovoltaic industry are all Made of Renewable Materials". These data show that "the heat generated in the production process of photovoltaic modules does not belong to energy consumption": what does the statement "hardly enter the power grid to circulate" and "key technologies and equipment of solar power generation system" indicate?
3. How much larger is the thermal conductivity of photovoltaic modules than the sun itself?
I think everyone is well aware that the sun itself is hot, and the solar radiation energy is hot when the wavelength is 0.633~0.762 nm, and our photovoltaic power generation needs to use short-wave infrared radiation. Short-wave infrared radiation is mainly concentrated in the wavelength region where sunlight is unstable; while solar radiant energy is thermal energy with a wavelength near the wavelength of visible light. Can produce changes (ie short-wave heat and long-wave heat) to form what we now call solar radiation. According to the information I have learned, the short-wave infrared radiation is 1000 times higher than the solar radiation energy! So it is impossible for the heat generated during solar panel manufacturing to spread throughout the panel! This is why the photovoltaic panels we use use metal shielding protective layers!
4. PV modules consume energy?
In fact, this is a guess without any scientific basis. After all, the production of photovoltaic modules mainly uses hydrogen as a raw material for production, and the source of hydrogen comes from natural gas. So the question is, in a photovoltaic system, if natural gas is to be used, how much natural gas does it consume? If there is no hydrogen, is there no need to use it? Of course not, just use hydrogen to generate electricity by illuminating the sun.
5. Does the production of photovoltaic modules also consume energy?
As far as the reporter knows, for photovoltaic power plants, the manufacturing process does not consume energy, just like solar power generation, there is no argument that energy is needed. The reporter also saw in the "Press Release of China Photovoltaic Power Station Operation and Maintenance Service Providers", "During the photovoltaic manufacturing process, in order to control the temperature of photovoltaic modules at about 200 degrees, various methods will be used to cool down the panels. These cooling methods can effectively reduce production losses. Taking the use of 500 watt/hour DC trough production equipment as an example, from February 2019 to the present, the average daily production of 120 MW of electricity, according to the current production capacity, consumes more than 340 kWh of electricity per day ." It can be seen that the statement that the photovoltaic modules generate heat in the report simply does not hold true.
