how to use incident angle modifiers

["Timo Sengewald" <timo.sengewald@xxxxxxxxxxxxxxxxxx>]

Hello!

I have got the test protocol (according to DIN EN 12975) of the german
ISFH for two different solar collectors: a flate plate and a evacuated
tube collector.
Can I use the given incident angle modifiers with Type 1 and Type 71?
For the flat plate collector the IAMs are called K_taualpha_dir(45°)
and K_taualpha_dif.
The IAMs for the tube collector are K_long(50°) and K_rad(50°).
Which values do I have to provide by the IAM files?

Thanks a lot,

Timo Sengewald



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