Solar Energy

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To calculate solar data for Iowa locations, follow these 3 steps:

How the solar calculator works.

1. 1. Choose a type of information


 
2. 2. Choose a configuration:
Four options are sun-tracking and the fifth is a fixed collector of selectable orientation. For windows select a fixed surface and make sure to adjust tils to vertical or any appropriate slope.
Sun Tracking Configurations
2-axis tracking: collector always faces sun   2-axis tracking: collector always faces sun
collector rotates arond one north-south axis tilted to latitude   collector rotates around one north-south axis tilted to latitude
collector rotates around one horizontal est-west axis   collector rotates around one horizontal east-west axis
 fixed configuration Fixed Configuration
   
Indicate tilt and azimuth below:
A tilt of 0 corresponds to a horizontal array, while a tilt of 90 corresponds to a vertical array. Collector Tilt

A tilt of 0 corresponds to a horizontal array, while a tilt of 90 corresponds to a vertical array.

Collector azimuth: an azimuth of zero corresponds to a south-facing array; ninety to an east facing array; one-hundred eighty to a north-facing array; and two-hundred-seventy to a west-facing array.  Therefore, the azimuth of an array facing 20 east of south will be 20, while the azimuth of a PV array facing 20 west of south will be 340. Collector Azimuth

An azimuth of 0 corresponds to a south-facing array; 90 to an east-facing array; 180 to a north-facing array; and 270 to a west-facing array. Therefore, the azimuth of an array facing 20 east of south will be 20, while the azimuth of a PV array facing 20 west of south will be 340.


   
3. 3. Choose a location in the state: