In addition to being rich in reserves, wind energy also has many advantages such as being renewable, never exhausted, clean and pollution-free. On the other hand, wind energy also has the following characteristics: low wind energy density, unstable wind power, large regional differences in wind energy distribution, and certain challenges. Disadvantages such as environmental problems: 1. Low wind energy density 2. Unstable wind 3. Large regional differences in wind energy distribution
Solar thermal power generation converts light energy into thermal energy, and then generates electricity through traditional thermal cycle technology that produces alternating current. Photovoltaic power generation is when sunlight irradiates high-purity silicon, causing electrons to transition, forming a potential difference, and the light energy is directly converted into electrical energy, which generates direct current.
Photovoltaics already have a unified national benchmark electricity price, while solar thermal still uses concession bidding or negotiated electricity prices on a case-by-case basis.
The cost per kilowatt-hour of photovoltaic energy is lower than the cost of electricity per kilowatt-hour of photothermal energy, which is very economical. At present, the cost of photovoltaic electricity is about 0.85 yuan/kWh, and the cost of photothermal electricity is about 1.8 yuan/kWh.
The photovoltaic power generation industry chain is relatively mature and developing rapidly, and the installed capacity of power stations is growing rapidly. The photothermal power generation industry has just started, and the industrial chain is imperfect. Industrial development faces many problems such as technical route selection, localization of relevant key equipment, and system integration.
Photovoltaic power generation has relatively strong national policy support, while recent national policy support for photothermal power generation has not been obvious.
Personally think: the advantages of photovoltaic power generation equipment.
Advantages of photovoltaic power generation supporting the construction of wind farms in Yumen City
The hazards of rooftop photovoltaic power generation are as follows:
1. Damage to the roof structure. Solar photovoltaic power generation relies on the voltaic effect produced by the semiconductors inside the solar panels. If the roof structure is not reinforced at the beginning of the design. Since the photovoltaic power generation equipment itself is very heavy, it may 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 brackets of the photovoltaic power generation system, you need to drill holes on the roof first. Drilling will destroy the original waterproof layer of the house. If the waterproof layer is not remade, it will leak when it rains. Because there is a gap between the screws and the holes, the waterproofing 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 far less effective than the first and will increase the possibility of water leakage.
3. Produce mold. Photovoltaic panels on the roof generally cover the entire roof, but are not fully enclosed. After a period of time, mold is likely to develop between the photovoltaic power generation panels and the roof, and the power generation panels are also prone to corrosion.
4. Affected by weather. The main working principle of photovoltaic power generation panels is to generate electricity by absorbing sunlight and converting solar energy resources. Therefore, when the weather is good, it can bring enough power, but if it is cloudy and rainy, normal electricity consumption will be affected.
5. Security issues. If strong winds occur, the photovoltaic panels may be blown over. especially the batteryIf the panel installation is not firm or the screws are rusty and aged, the panel may be blown off by the wind, and subsequent maintenance costs will be higher.
Will photovoltaic, wind and other power generation projects have any impact on the human environment?
There is no need to build new power generation equipment and the utilization rate is improved.
1. There is no need to build new power generation equipment. Since the wind farm has already been built, it only needs to be modified and installed with photovoltaic power generation equipment, saving the cost and time of new power generation equipment.
2. The utilization rate of power generation equipment is improved. Wind farm blades can generally only be driven by wind during the day. However, using photovoltaic power generation can increase the power generation time and improve the power generation efficiency of wind farms.
3. More energy-saving and environmentally friendly. Photovoltaic power generation can reduce carbon emissions and reduce environmental pollution. It is a more energy-saving and environmentally friendly way of generating electricity.
A household photovoltaic power station consists of photovoltaic modules, photovoltaic inverters, photovoltaic brackets and photovoltaic cables. Photovoltaic modules receive sunlight and generate direct current. Photovoltaic power generation is photoelectric conversion, not physical power generation, nor chemical power generation. This process does not produce pollution and does not produce any waste. Therefore, photovoltaic power generation is pollution-free, radiation-free, and inexhaustible clean energy.
Photovoltaic inverters are generally installed in residents' homes to convert the DC power generated by photovoltaics into AC power before it can be used or integrated into the power grid. Some residents are also worried about the safety of electrical appliances. In fact, there is no problem with inverters that pass the quality standard and keeping the electrical appliances ventilated. The radiation is much smaller than that of the TV at home.