[TRNSYS-users] Solar angles in evacuated tube collectors

[Ashley Mansell]

Trnsys users,

The type 71 evacuated tube collector model calls for solar incidence angle,
solar zenith angle and solar azimuth angle as 3 of the inputs. I know they
relate to the location of the sun but I do not know where the data comes
from. How are these inputs determined for a known latitude and longitude
from a TMY weather data file.

Regards

Ashley Mansell