[TRNSYS-users] reg: roof garden with TYPE 56

[David Bradley]

Raj,
   I am not aware of a green roof model for TRNSYS. You could certainly 
simulate a dry green roof by simply adding a soil material layer to your 
Type56 wall description. The problem comes with dealing with a wet roof, in 
which case the thermal properties can change quite dramatically when the 
roof is dry or wet. I think you would have to write a model that takes 
Type56's inside surface temperature and simulates the temperature, and 
moisture gradients through the soil layer in your roof. The model would 
need to incorporate some algorithm to estimate the moisture evaporation 
rate from the roof surface as well as the solar incident on its surface.  I 
would be interested to hear if people have a different idea as to how to 
approach such a problem. We have seen a few projects come through with a 
green roof but never had one in which we were able to develop such a model.
Cheers,
  David


At 12:20 2/27/2006, RAJ KUMAR wrote:

>Dear TRNSYS friends,
>
>         I want  to simulate  roof garden with TYPE  56.   Is it
>  possible to do?. If it is possible, can anyone help  me?.
>
>  Regards,
>Rajkumar.S
>
>
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Thermal Energy System Specialists (TESS), LLC
David BRADLEY                           2916 Marketplace Drive - Suite 104
Partner                                        Madison, WI 53719
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