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Photovoltaic power generation has these advantages:
1. “Full cleanliness, absolute safety, relative breadth, guaranteed long life and maintenance-free, resource-saving Adequacy and potential economy play 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:?① No risk of depletion;?
② Safe and reliable, no noise, no pollution emissions, absolutely clean (no pollution);?
③ Not restricted by resource distribution area, can be used Advantages of building roofs; for example, areas without electricity and areas with complex terrain;?
④Can generate power on site without consuming fuel and erecting transmission lines;?
⑤Energy quality High;?
⑥Emotionally acceptable to users;?
⑦The construction period is short, and the time it takes to obtain energy is short.”
In addition, it is for household use. Distributed photovoltaic power generation can also bring certain economic income to users.
Due to the different sunshine coefficients in different places, a 1KW module can be effectively exposed to 6 hours of sunshine, which is 6 kilowatt-hours of electricity per day without considering the loss. The loss of independent systems is generally 30%. 6*0.7=4.2kw/h.
If a 15kw photovoltaic power station is installed at home, the power generated per day is 15*6*0.7=63kw/h, generating 63 kilowatt hours
Each kilowatt hour (0.49+0.08) *63=35.91 yuan/day
(Source: Carbon Silver Photovoltaics)
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What are the differences between photovoltaic power generation and general power generation?
Both photovoltaics and wind power are currently recognized as new clean energy sources that have little impact on the environment.
However, although it is claimed to be clean energy, strictly speaking, whether it is photovoltaic or wind power, it will have a certain impact on the environment.
For example, photovoltaics will have the following impacts on the environment:
1. The layout of photovoltaic panels will take up a lot of space.
2. During the production process of photovoltaic panels, trichlorosilane and silicon tetrachloride will be produced, which are substances that have an impact on the environment and human health.
For example, wind power will also have an impact on the environment during the deployment process.
It is said that large-scale deployment of wind power will affect atmospheric circulation and cause changes in ambient temperature.
It is also said that large-scale deployment of wind power will affect the circulation of water vapor in the atmosphere and affect the distribution of rainfall zones.
Leaving aside whether the above statement is accurate, the two new energy sources of photovoltaic and wind power themselves have not yet achieved 100% no impact on the environment. ...it will have some impact to some extent.
Of course, compared with traditional energy sources, photovoltaic and wind power have very little impact on the environment and are environmentally friendly enough. Therefore, these two new energy sourcesOnly with other new energy sources can they achieve such extensive development.
Photovoltaic power generation has more advantages than traditional power generation technology: 1. Solar energy resources are very abundant, and the energy radiated to the earth's surface is huge, which is very beneficial for utilizing solar energy. Therefore, solar photovoltaic power generation technology is a power generation technology with abundant resources. 2. Solar photovoltaic power generation is safer and more reliable, does not produce pollution and noise, is more flexible, and can operate safely and stably.
3. The application of photovoltaic power generation can effectively solve the power consumption problems in remote and special areas, and solar energy resources can be used anytime and anywhere.
4. Photovoltaic power generation can be combined with buildings to form a photovoltaic building-integrated system to reduce the waste of land resources.
: Advantages of photothermal power generation
1. The power quality is excellent and can be directly connected to the grid without any obstacles. Solar thermal power generation has the same principle as conventional fossil energy thermal power generation. It converts thermal energy into electrical energy through Rankine cycle, Brayton cycle or Stirling cycle, and directly outputs alternating current. It does not need an inverter to convert the electricity like photovoltaic or wind power. The transmission technology is relatively mature and has high stability, so it is more convenient to connect with the current domestic power grid and the power quality is good.
2. It can store energy, adjust peaks, and achieve continuous power generation.
The load curve shape of the power grid is similar to the natural curve of solar power generation during the day. The load increases with time in the morning and decreases with time in the afternoon. Therefore, solar power generation is a natural peak load of the power grid, which can be adjusted according to the load of the power grid during the day and night. The maximum load difference determines the load proportion, which generally accounts for 10-20%;
Benefiting from the easy storage of thermal energy, all solar thermal power stations have a certain degree of peak shaving and dispatching capabilities, that is, The buffering and smoothing of power generation can be achieved through the conversion of heat, and can cope with the short-term instability of solar energy;
Energy storage is a major bottleneck in the development of renewable energy, and practice has proven that the efficiency and economy of heat storage are significant Better than electricity storage and pumped hydro storage. A solar thermal power station equipped with a special heat storage device can not only replenish energy at startup and when it is cloudy to cloudy, ensuring the stable operation of the unit, but can even achieve 24-hour uninterrupted power generation after sunset. At the same time, it can generate electricity according to the load and power grid Demand for power peak shaving and dispatching.
3. Prominent cost advantage due to scale effect.
Because the thermoelectric conversion process is the same as that of thermal power, solar thermal power generation also has significant scale effects like thermal power, which is better than wind power and photovoltaics. With the advancement of technology and the expansion of industrial scale, the cost of solar thermal power generation will soon be close to or even lower than the cost of traditional fossil energy power generation.
4. Clean and pollution-free, helping to reduce carbon emissions.
Although photovoltaic power generation is clean, the silicon wafer production process consumes high energy and causes high pollution. Solar thermal power generation does not require refining heavy metals, rare metals and silicon, and the production and power generation processes are pollution-free. It is truly of clearClean energy.