Roof waterproofing is indeed an issue that requires special attention during the construction process of solar power generation equipment, but as long as the correct construction steps are followed, the roof will not leak. Generally, professional construction and installation processes will not damage the waterproofing of the roof, and additional waterproofing treatment will actually improve the waterproofing.
What is the power generation principle of photovoltaic power generation system and can it be used normally in rainy days?
The risks associated with the production of photovoltaic energy on the roof are as follows:
1. Damage to the roof structure. Photovoltaic solar energy production relies on the voltaic effect produced by semiconductors inside solar panels. If the roof structure is not reinforced at the beginning of the design. PondSince the photovoltaic power generation equipment itself is very heavy, it can damage the roof structure, especially if it is an old house, it is very likely to damage the roof .
2. Destroy the waterproof layer on the roof. To install the photovoltaic power system brackets, you must first drill holes on the roof. Drilling will destroy the original waterproof layer of the house. If the waterproof layer is not redone, it will leak when it rains. a gap between screws and holes, the sealing process The requirements are very high. If it is too thick, it will affect the installation. Too thin and ineffective. The second waterproofing effect is much less effective than the first and will increase the risk of water leakage.
3. Produce mold. Photovoltaic panels installed on the roof generally cover the entire roof, but are not completely enclosed. After thisAt some point, mold is likely to grow between photovoltaic power panels and the roof, and power panels are also prone to corrosion.
4. Affected by weather. The main working principle of photovoltaic power generation panels is to produce electricity by absorbing sunlight and converting solar energy resources. Therefore, when the weather is good, they can provide enough power, but if it is cloudy and rainy, normal power consumption will be affected. .
5. Security issues. In case of strong wind, the photovoltaic panels can be overturned. Especially if the battery panel is not firmly installed or the screws are rusty and aged, the battery panel may be blown away by the wind and subsequent maintenance costs will be higher.
Sunlight shines onr the p-n junction of the semiconductor, forming new hole-electron pairs. Under the action of the electric field of the p-n junction, holes flow from the n region to the p region, and electrons flow from the p region. from region p to region n, a current is formed when the circuit is turned on. This is how photovoltaic solar cells work.
1. Solar power generation methods There are two solar power generation methods, one is light-heat-electricity conversion method and the other is direct light-electricity conversion method.
(1) The light-heat-electricity conversion method uses thermal energy generated by solar radiation to produce electricity. Generally, a solar collector converts the absorbed thermal energy into steam as the working fluid and then drives it away. a steam turbine to produce electricity. The first process is a processlight-heat conversion; the second process is a heat-electricity conversion process, which is the same as ordinary thermal power generation. The disadvantages of solar thermal power generation are that its efficiency is very low and its cost is high. Its investment is estimated to be at least higher than that of ordinary thermal power plants, which are 5 to 10 times more expensive.
(2) Method of direct conversion of light into electricity This method usesThe photoelectric effect directly converts the energy of solar radiation into electrical energy. The basic device for converting light into electricity is the solar cell. A solar cell is a device that directly converts solar energy into electrical energy through the photovoltaic effect. When the sun shines on the photodiode, the photodiode converts light energy from the sun into electrical energy, producingfluent. When many batteries are connected in series or parallel, a solar cell array with relatively large output power can be formed. Solar cells are a promising new energy source with three major advantages: solar cells have a long lifespan and can be invested once and used for a long time as long as the sun exists, they are different from production thermal energy; and nuclear energy production. In comparison, solar cells do not cause environmental pollution.