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@engr.wisc.edu SEL Web Site: http://sel.me.wisc.edu TRNSYS Web Site: http://sel.me.wisc.edu/trnsys