|
How much solar energy reaches the earth? |
|
|
Frequently Asked Questions -
Energy
|
The sun’s energy reaching the earth surface is 15,000 times more than
our energy demanded. In each fully sunlit hour, about 1kW of power is
available to each m2 of surface.
Before reaching the earth surface, about 30% of the 177x1012 kW is
reflected back to outer-space. 47% out of the 70% reaching the earth
converts to heat. It keeps our earth warm. The rest absorbs by water.
In the environment, about 0.2% of the energy transforms and carries by
winds and currents, while photosynthesis absorbs about 0.02%.
|
FAQ 