First determine the local radiation data based on geographic location
Assume that the solar radiation power is 1000 W/m2 and the photoelectric conversion efficiency of the solar cell is 14%
Then the unit area of the panel is The power generated under this irradiation condition is: 1000W/m2×14%=140W/m2, then the time required to generate one kilowatt hour of electricity (1kWh) is =1kWh÷140W= 1000÷140=7.14 hours
Therefore, it takes 0.714 hours for a 10 m2 panel to generate 1 kWh of electricity< /p>
The key to the problem is to give the power of solar radiation, because the value changes throughout the day, with a maximum at midnight.
Everyone knows that solar power generation is a new source of energy and is considered a high-tech industry everywhere. It can be said that the current situation is not a profitable business. InIndeed, photovoltaic solar panels produce carbon emissions during the production process. We recently carefully calculated that for every kilowatt hour of electricity produced by photovoltaic solar panels, 280 grams of carbon dioxide equivalent were emitted in advance during the production process in China, that's less than 100, but we use coal. power for production. Exported to Germany, Germany reduced its carbon emissions by 480 grams for every kilowatt hour of electricity produced, meaning it reduced its net emissions by 480 grams. However, globally it has only reduced its carbon emissions by 200 grams. According to 2009 data from the National Development and Reform Commission, we emit 860 grams for every kilowatt hour of electricity produced. If we use solar energy, we will reduce our emissions by 560 grams. Lhe world has also reduced by the same amount. Our photovoltaic panel production represents 40% of the global total and our annual installations represent less than 1% of the global total.