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At midday, solar energy strikes the earth with an
Chapter 11, Problem 31E(choose chapter or problem)
Problem 31E
At midday, solar energy strikes the earth with an intensity of about 1 kW/m2. What is the area of a solar collector that could collect 150 MJ of energy in 1 h? This is roughly the energy content of 1 gallon of gasoline.
Questions & Answers
QUESTION:
Problem 31E
At midday, solar energy strikes the earth with an intensity of about 1 kW/m2. What is the area of a solar collector that could collect 150 MJ of energy in 1 h? This is roughly the energy content of 1 gallon of gasoline.
ANSWER:
Step 1 of 3
Our aim is to find the area of the solar collector at midday.
The intensity of the solar light \(\mathrm{I}=1 \mathrm{~kW} / \mathrm{m}^{2}=1000 \mathrm{~W} / \mathrm{m}^{2}\)
The energy collected \(\Delta \mathrm{E}=150 \mathrm{MJ}=150 \times 10^{6} \mathrm{~J}\)
The time duration \(\Delta \mathrm{t}=1 \mathrm{~h}=60 \times 60 \mathrm{~s}\)