Mohannad, If I am understanding your configuration correctly, you have a large west facing facade that has vertical fins projecting perpendicularly every 2 meters? If this is the case, you can think of the facade as a series of 2m sections all of which are identical. So you could define a Type34 for the repeating section: width 2m, height 3m each with a left and a right wingwall that projects 1.8m. Type34 calculates solar radiation per unit area on the facade so you can then apply its calculated result to the entire 18m x 3m facade. If you wanted to be a little more rigorous, you could define two Type34s, one for the opaque part of each 2m wall section and one for the transparent part. If you are using Type56, you would then have to define your windows in the "additional windows" category so that they can have a different ORIENTATION name than does the wall. Recall that all an ORIENTATION means in TRNBuild / Type56 is that a certain amount of radiation per unit area falls on all surfaces having that ORIENTATION. Best, David Mohannad Bayoumi wrote: Dear all, -- *********************************************************************** Thermal Energy System Specialists (TESS), LLC David BRADLEY 22 N. Carroll Street - Suite 370 Partner Madison, WI 53703 USA P: +1.608.274.2577 F: +1.608.278.1475 E-mail: bradley@tess-inc.com Web Pages: http://www.tess-inc.com and http://www.trnsys.com *********************************************************************** |