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The world electricity consumption is roughly 20,300 TWh per year. We want to cover the total...

The world electricity consumption is roughly 20,300 TWh per year. We want to cover the total electricity demand of the world by installing solar thermal power in the Sahara desert, where the average daily solar insolation is 6.3 kWh/m^2 . The Sahara has an area of 9,400,000 km^2 .

A.) Assuming that the overall efficiency of a solar thermal power plant is 20%, how much area will be needed to cover the world electricity demand?

B.) What percentage of the area the Sahara would be covered?

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