引用:
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作者Adsmt
太陽能陰天仍可發一半的電力.....
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http://www.powerfromthesun.net/Book.../chapter02.html
Figure 2.14 Example of global (total) irradiance on a horizontal surface for a mostly clear day and a mostly cloudy day in Greenbelt, MD (Thekaekara, 1976): (a) global solar radiation for the day was 27.1 MJ/m2; (b) global solar radiation for the day was 7.3 MJ/m2.
以這個沒有整天陰天的實驗來看，
陰天只有晴天的 27% 。