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Author Question: How far above the horizon is the sun on the first day of summer? What will be an ideal ... (Read 69 times)

lb_gilbert

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on: Jul 26, 2018
How far above the horizon is the sun on the first day of summer?
 
  What will be an ideal response?

Question 2

A certain installation requires 36 V and at least 2 kW of rated power. Describe the configuration using 36-cell modules, where each module produces 12 V and 4 A.
 
  What will be an ideal response?


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coyin

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Reply #1 on: Jul 26, 2018
Answer to Question 1

On the first day of summer, the sun is at the latitude of the observer plus 23.4o at noon.

Answer to Question 2

For three series modules:

VTOT = (3 modules)(12 V/module) = 36 V

ITOT = PTOT/VTOT = 2 kW/36 V = 55.6 A total current to obtain 2 kW out. Number of 3 series modules in parallel = 55.6 A/4 A = 14 groups
The configuration consists of 14 groups in parallel; each group has 3 series modules for a total of 42 modules.


lb_gilbert

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Reply #2 on: Jul 26, 2018
Both answers were spot on, thank you once again


coyin

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Reply #3 on: Jul 26, 2018
Great! Please up vote :D


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