What damage could large solar panels on the roof of your home, such as radiation, cause to your home? 1. The roof has increased its load-bearing capacity;
2. It will be more difficult to waterproof the roof in summer because there is a lot of equipment on it;
Radiation? Adding solar panels to the roof blocks the impact of solar radiation on the house and people, thereby reducing radiation. After all, sunlight is made up of particles emitted by solar nuclear fusion. If it is not protected by the ozone present in the atmosphere and shines directly on the surface like other planets or the Antarctic hollow zone, it will seriously harm humans. This is why animals in the Antarctic cave zone suffer from blindness and skin cancer.
As for electricity, is there radiation? Then you should go back in time, live in a terracotta or wooden house, brburn firewood for cooking, light wax for lighting and turn off all electrical appliances. After all, you think that when there is electricity, there is radiation, but now the wires are embedded in the walls and the house is full of electrical appliances. If electricity is used, the entire building will be radiated. and there is no way to live. Let's go back and read the high school textbooks. Solar panel
Solar panel is a device that absorbs sunlight and converts solar radiation energy directly or indirectly into electrical energy by photoelectric effect or photochemical effect. It is the main material of most solar panels. ", but due to its high production cost, its widespread use still has certain limitations.
Compared with ordinary batteries and recyclable rechargeable batteries, solar cells are productsmore energy efficient and more environmentally friendly.
Chinese name
Solar panel
Foreign name
Solar panel
Main materials
< p>Silicon"Energy
Solar energy
Is it renewable
Renewable
Fast
p > p>Navigation
Material classification Areas of application Principles of energy production Lifespan Production process Test methods Detection and maintenance New development
Structural composition
1) Tempered glass
Its function is to protect the main power generation body (such as battery cells. There are requirements for the selection of). light transmittance 1. Light transmittance should be high (generally above 91%) 2. Ultra-white tempered treatment
p>2) EVA
is used to bond and fix the tempered glass and the main body of power generation (such asbattery cells); The quality of the transparent EVA material directly affects the lifespan of the component. EVA exposed to air is easy to age and yellow, thereby affecting the light transmission of the module and thus affecting the power generation quality of the module. In addition to the quality of the EVA itself, the module manufacturer's lamination process also has a big impact. For example, the bonding degree of EVA is not up to standard, and EVA and tempered glass, insufficient bonding strength of the backplane will cause premature adhesion. aging of EVA and affects the lifespan of components.
3) The main function of the battery is to generate electricity, and the mainstream in the power generation market is crystalline silicon and thin film solar power. cells have their own advantages and disadvantages. Crystalline silicon solar cellsn have relatively low equipment costs, but the consumption and costs of cells are low. It is very high, but the photoelectric conversion efficiency is also high, and it is more suitable for generating electricity under the outdoor sunlight; thin film solar cells have relatively high equipment costs, but the consumption and battery costs are very low, but the photoelectric conversion efficiency is more than half of that of crystalline silicon cells, but the Low light effect is very good and can generate electricity under ordinary light, such as calculator solar cells.
4) EVA
works as above, mainly bonding and encapsulating the main body of the power generation and the backsheet
Solar panels< /p>
5) Backsheet
Function, sealing, insulation, waterproofing (generally TPT, TPE and other materials are used and must be resistant to aging. Most component manufacturers have a 25-year warranty. Tempered glass and aluminum alloys are generally no problem. The key is whether the backplate and silicone can meet the requirements? )
6) Aluminum alloy
Protect the rolled parts and play a certain sealing and supporting role
7) Wiring The case
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protects the entire power generation system and acts as a power transfer station. If a component is shorted, the junction box automatically disconnects the shorted battery string. to prevent the entire system from burning out. The most critical thing in the junction box is the diode selection. Depending on the type of cells in the module, the corresponding diodes are also different
8) Silicone
Sealing function, used to sealthe module at the junction of the aluminum alloy frame, components and junction box. Some companies use double-sided tape and foam to replace silica gel. The process is simple, practical, easy to use and the cost is very low.
Electricity production mainly depends on sunlight conditions and local temperature. In good sunlight conditions, it can produce more than 20 kilowatt hours of electricity in winter (calculated over 4 hours) and more than 40 kilowatt hours of electricity in summer (calculated over 8 hours). However, taking into account weather factors such as rain, haze, etc., the average daily sunshine in a normal area is about 4 hours per year. In other words, regardless of wind or rain, a 5 kW photovoltaic plant can produce electricity. 5000*4*365=7300 degrees per year approximately. Some droughts and low areaslatitude with good lighting conditions will produce more energy.
Detailed information:
1. Advantages of photovoltaic power generation:
< p>No matter from the world's or China's perspective, conventional energy is very limited. China's primary energy reserves are well below the global average and represent only about 10% of the world's total reserves. Solar energy is an inexhaustible source of renewable energy for humanity. It is completely clean, absolutely safe, relatively widespread, truly durable and maintenance-free, sufficiently resourced and potentially economical, and plays an important role in long-term energy. strategy.Compared with commonly used thermal power generation systems, the advantages of photovoltaic power generation are mainly reflected in:
①No risk of euse
②Safe and reliable, no noise, in addition to no pollution discharge, it is absolutely clean (no pollution);
③Not limited by geographical distribution resources, you can take advantage of building roofs; for example, areas without electricity and areas with complex terrain;
④Can generate electricity and provide electricity on site without consuming fuel or erecting transmission lines;
⑤High quality energy;
⑥ Easy for users to accept emotionally
⑦ Short construction period and short time to obtain energy.
2. Disadvantages of photovoltaic power generation
Solar panel production has the characteristics of high pollution and high energy consumption. In current conditions, it is also said to be difficult. to produce panels for domestic use. In the past, theLarge-scale exports amounted to pollution to China and benefited the entire world. According to statistics, more than 40 kilograms of coal must be burned to produce a 1 m by 1.5 m solar panel, but even the most inefficient thermal power plant in China can use this coal to produce 130 kilowatt hours of electricity ( typically a 1m x 1.6m solar panel generates over 250 kilowatt hours per year) - this is enough to produce a 2.2 watt light emitting plant. The diode bulb (LED) shines for 30 years based on a 12-hour working day.
① The energy distribution density of irradiation is low, which means that it occupies a huge area
② The energy obtained is related to the four seasons, day and night, cloudy and; sunny conditions and other weather conditions.
③ At present, compared to thermal energy production, the cost of generatorsrs is high.
④The manufacturing process of photovoltaic panels is not environmentally friendly.
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