[TRNSYS-users] Solar angles in evacuated tube collectors

[Michaël Kummert]

Ashley,

> 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.
> 

In case you did not figure it out by now, those inputs come from the 
solar radiation processor, Type 16. You always ned at least one Type 16 
unit in a simulation if you use the solar radiation in any way (most, if 
not all, components need the radiation on a tilted surface and the 
incidence angle).

Kind regards,

Michaël Kummert

-- 
_________________________________________________________

Michaël Kummert

Solar Energy Laboratory - University of Wisconsin-Madison
1303 Engr Res Bldg, 1500 Engineering Drive
Madison, WI 53706

Tel: +1 (608) 263-1589
Fax: +1 (608) 262-8464
E-mail: kummert at engr.wisc.edu

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