Divide 4.8 kilowatt hours of electricity by the power of installed components per square meter to obtain an electricity production of 1 W per year.
According to experience, in China, the installed capacity of large and medium-sized ground-mounted power plants should be around 60W per square meter. Taking Beijing as an example, the average effective sunshine for many years is 1,460 hours. . Calculated this way, 60W×1460h=87.6 kWh. 87.6kWh÷60W=1.46 kWh/W, i.e. the electricity production of 1 watt per year is 1.46 kWh. The data in the question should be wrong.
1.825 billion kilowatt hours of electricity.
Under the optimal tilt angle, the equivalent sunshine hours in Beijing are 1,576 hours per year, with an average of 4.32 hours per day. Under normal circumstances, December sees the worst sunshine, with one. average of only 2.47 hours perday, with the best sunshine in May, with an average of 6.17 hours per day.
Therefore, the total electricity production for the whole year is 5 kW*80%*1,576 h=6,304 kWh, the average daily electricity production for the whole year is of 17.27 kWh and the average daily electricity production in December is 5 kW. *80%*2.47h=9.88kWh, the average daily electricity production in May was 5kW*80%*6.17h=24.68kWh.
Precautions for photovoltaic power plants
For photovoltaic power generation systems that operate for a long time, the impact of dust accumulation on the panels cannot be underrated. The dust on the surface of the panel has the function of reflecting, scattering and absorbing solar radiation, which can reduce the transmission of the sun, causing the panel to receive less solar radiation and reduce the output power. Its effect is professionalportional to the accumulated thickness. dust.
Shading is the most taboo problem in photovoltaic power plants. Pay attention to design and installation, and even more attention to subsequent operation and maintenance. Common shadows mainly include bird droppings, dust, shadows of trees, buildings, fallen leaves and branches, etc.