How to model a green facade in openstudio using a Building Shading Object?

I have built my model in OpenStudio and i try to simulate a green wall as a building shading device (BS), (according to Thermal simulation of a double skin façade with plants by Silvana Flores Larsena, Celina Filippínb, Graciela Lesinoa) with the transmittance of the foliage layer. Although, i can't find out which type of material i have to use in order to input Solar transmittance 0.2, Solar reflectance 0.3, Visible reflectance 0.09, View factor to ground 0.1, Convective coefficient 6, that are given and what the final shading construction is.

I would appreciate your help on this problem. Thank you in advance.

You can associate a transmittance schedule to a shading surface. This is a fractional schedule where a value of 0.0 represents an opaque surface and 1.0 is transparent. You can change your value seasonally and based on time of day. Not sure if this is what you are looking for, but if you are trying to model the plants blocking some portion of the sun from the surface building then it may do what you want. Keep in mind that shading surfaces are not heat transfer surfaces and don't interact with the model in the same way.

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David Goldwasser

answered 2017-03-01 13:18:03 -0500

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Thanks for your reply David. However, i still cannot find the right material type for my shading device in order to input the green facade properties. I think you are right about the transmittance schedule.