Interpretation:
The percent efficiency of the tower is to be calculated.
Concept Introduction:
Hundreds of sun-tracking mirrors, called heliostats, form a tower.
The percent efficiency of heliostats is given by:

Answer to Problem 10.1YT
Solution:
Explanation of Solution
Since the total power produced is
The conversion of kW into W is as follows:
Since the total number of heliostats is
Hence, the active area is
The solar energy falls on the active area at the rate of
Therefore, the input power is
The percent efficiency of heliostats is calculated as follows:
Substitute
The tower gives a percent efficiency of
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Chapter 10 Solutions
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