Assume that the average human adult requires 2000 kilocalories per day to sustain all normal processes and maintain a constant weight
If manufactured solar panels could somehow provide power directly to the human body, what size solar panel would be required (in cm2)? Assume there are 10 hours of sunlight per day, and that the usable energy output for a typical solar panel is 850 kJ/ft2 per hour.
Note: 1 kcal = 4.184 kJ
1 ft2 = 929.03 cm2
Conversion factors:
1 kcal = 4.184 kJ
1 ft2 = 929.03 cm2
If there are 10 hours of sunlight each day hitting the solar panel, there are 8500 kJ/ft2 produced per day. The average adult human requires 8368 kJ per day; thus, with a conventional solar panel, we would require a surface area of about a square foot, or more precisely in cm2:
8368 kJ/X = 8500 kJ/929.03 cm2
929.03 ?ltiply 8368/8500 = X
X = 914.57 cm2
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