Using your values for the amount of heat received from the sun (0.85900815 J), c

Question

Using your values for the amount of heat received from the sun (0.85900815 J), calculate an approximate value that a solar collector on a roof that has area 100 m2 would collect on a clear winter day. Remember, the sun doesn't shine very long each day in winter, nor does it always strike the collector perpendicularly. Some educated estimates will have to be made. If you were required to purchase the above energy for 8 cents per kilowatt hour, how much would your monthly bill be based upon your answer to the answer above?

Explanation / Answer

At earth solar power received, P = 1,000 W/m2

Area of the solar cell , A = 100 m2

Thus total energy received by the solar cell in one day time, E = P x A x t = 1,000 x 100 x 24 x 60 x 60

= 8.64 x 109 J.

1 KiloWatt-hour = 3.6 x 106 J

Thus, the Number of cents to be paid = (E/(3.6 x 106 )) = 517. 78 cents = $ 5.178

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