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Leen, If you are using Trnsys17 and Trnsys3D, this is fairly straightforward. You would add a shading device to the Trnsys3D model and Type56 would automatically assess its impact provided that you ask TRNBuild to generate the shading mask. If you are using Trnsys16 or want to rely on Type34, what I would suggest is that you define approximately three Type34s. Define each one's aperture to be the height of the facade and about 1/3 its length. For simplicity, pretend that the total facade is 100m long and that the overhang projects 1m. One Type34 will have a 66.6m left overhang extension and a 0m right overhang extension. The second Type34 will have a 33.3m left overhang extension and a 33.3m right overhang extension. The last one will have a 0m left extension and a 66.6m right extension. All three will have a 1m projection. I would then take the solar radiation computed by those Type34s and pass it to the Type56 facades. Bear in mind that you will have to break the Type56 facade up into three parts and you will have to assign each part its own "orientation" not because they face different directions but because Type56 associates orientations with a unique amount of solar radiation falling on a surface. Of course if you don't think that three pieces is enough precision, you can break the facade up into more pieces. Best, david On 6/11/2012 03:09, leen peeters 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 |