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 latitude areas with good light conditions will produce more energy.
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1. Advantages of photovoltaic power generation:
< p>No matter from the perspective of the world or China, the energy is conventionalit 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 depletion
②Safe and reliable, no noise, in addition to the absence of polluting emissions, it is absolutely clean (no pollution);
③It is not limited by the geographical distribution of resources and can take advantage of building roofs, for example, areas without; electricityand areas with complex terrain;
④Can generate electricity and supply electricity on site without consuming fuel or erecting transmission lines;
⑤High quality of energy;
⑥Easy to use users need to accept emotionally;
⑦ The construction period is short and the time spent on obtaining energy is short.
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, large-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 power plantChina's most inefficient thermal power plant 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 kilowatt-hour light-emitting power plant watts. The diode bulb (LED) shines for 30 years based on a 12-hour working day.
① The energy distribution density of irradiation is small, that is, it occupies a huge area
② The energy obtained is related in the four seasons, day and night, cloudy; and sunny and other weather conditions.
③ At present, compared to thermal power generation, the cost of generators is high.
④The manufacturing process of photovoltaic panels is not environmentally friendly.
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