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Rudai, I think you are on the correct path; the "receiver" defined in Type34 should be for each divided part of the window. Keep in mind that Type34 is computing a modified amount of solar radiation falling per unit of receiver area so it is okay for the area of the receiver and the area of the actual window defined in TRNBuild/Type56 to be different. One other caution about Type34; the model computes a diffuse sky view factor and the amount of diffuse radiation falling on the receiver. In its computation, it assumes an isotropic sky. In order to be most correct, you should put your Type15 (or other weather data reader/processor) into isotropic sky mode. I have found, however, that the change between the isotropic and anisotropic sky models can have a greater impact on the building energy use than do the shading features themselves. Since the anisotropic sky models are much preferred over the isotropic model, I tend to leave Type15 set in its Perez diffuse sky mode and then pass both the shaded and unshaded diffuse radiation to an online plotter and make sure that the calculated values make sense. Best, David On 6/24/2013 23:35, Rudai Shan wrote:
-- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com |