[TRNSYS-users] Glass shading overhang with dynamic reflection coating

[De manke]

Dear all, for the simulation of a new coating, I would like to simulate a transparent (glass) overhang above a window. The coating I'm interested in has a few important characteristics:- It is dynamic (it can be turned on and off)- It is spectrally selective (seperate between infrared and visible light reflection)- Its reflection value depends on the angle of incidence- The coating is located on this glass overhang.  My question is what the best way would be to model this configuration in TRNsys. Most accurate would probably be to create an overhang above the window, of which the properties can be adjusted. I haven't found a way to create a glass overhang yet, nor a way to add a coating with the abovementioned flexibility and selectivity. Could anyone tell me whether this is possible, and if so, how I can do this?   ***Alternative solution*** If this is not possible, I may have an alternative, but again with some questions. I do have a table with transmission values of the coating for each angle of incidence, so a way to get around this might be to let TRNsys determine the percentage of the window that is shaded by the overhang at a certain time and date, and multiply this output with the reflection value that I can find in this table. If I would do so for visible light and infrared light, and combine the results, I would get a g-value with which TRNsys could calculate my cooling demand. For this method, there are a few things I wonder: - The angle of incidence can be taken from the weather data file, but how can I use this output as an input to let TRNsys select the appropriate transmission value from my table? - Is it possible to let TRNsys calculate the percentage of the window that is shaded, and use this as an input for the proposed multiplication with the transmission value from the table? Thanks a lot in advance to anyone who is willing to help and answer (some of) my questions. Kind regards,  Tom 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20130308/d75ea675/attachment-0001.htm>