No matter from the world or from China, conventional energy is very limited. China's primary energy reserves are far below the world average, about 10% of the world's total reserves. Solar energy is an inexhaustible renewable energy source for human beings, with full cleanliness, absolute safety, relative universality, true longevity and maintenance free, adequate resources and potential economic advantages, playing an important role in the 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 exhaustion;
Safe and reliable, no noise, no pollution emissions, absolutely clean (pollution-free);
(3) Not limited by the distribution of resources, the advantages of building roofing can be used; For example, areas without electricity, and areas with difficult terrain;
(4) Power can be generated locally without consuming fuel and erecting transmission lines;
⑤ High energy quality;
⑥ The user is easy to accept emotionally;
The construction cycle is short, and the time spent to obtain energy is short.
shortcoming
However, the production of solar panels has the characteristics of high pollution and high energy consumption, under existing conditions, the production of domestic panels for their own use also said in the past, but a large number of exports equal to pollution in China, the benefit of the world, according to statistics, the production of a 1m×1.5m solar panel must burn more than 40 kilograms of coal, But even China's most inefficient coal-fired power plant can produce 130 kilowatt-hours of electricity from that coal (a typical 1mx1.6m solar panel generates more than 250 kilowatt-hours a year) - enough to keep a 2.2-watt light-emitting diode (LED) bulb glowing for 30 years, working 12 hours a day.
(1) The energy distribution density of irradiation is small, that is, to occupy a huge area;
The energy obtained is related to weather conditions such as four seasons, day and night, cloudy or sunny.
(3) Compared with thermal power generation, the opportunity cost of power generation is high.
Photovoltaic panel manufacturing process is not environmentally friendly.
The above content is from Wikipedia.
