[TRNSYS-users] ts15-typ56 int shad factor

[Diego A. Arias]

Dear Xavier:

I apologize for taking so long to answer your question.  I needed to 
consult Marion Hiller at Transsolar, who is an expert on the topic.
You can refer to Section  4.3 in the Volume '06-MultizoneBuilding.pdf' 
of the manual, and specifically to Section 4.3.2. page 46, to understand 
how the properties of shading devices are entered in TRNBuild.

Property values (rho and alpha) are given for the covered area (opaque 
and transparent).
1= tau + rho + alpha
or for different reflectivity on both sides:
1= tau + rho_i + alpha_i and
1= tau + rho_o + alpha_o

In TRNBuild (right click on your TYPE56 component, and select 'Edit 
building'), you can use the WINDOW TYPE MANAGER to modify the window in 
order to take into account the properties of the curtain:
- In the 'Optional Properties of Shading Devices' section, you can 
specify two 'Reflection Coefficients of Internal Device':
   -  Towards window: REFLISHADE = rho_i / (1-tau) (towards the window)
   -  Towards zone:  REFLOSHADE = rho_o / (1-tau)

Please let me know if this answered your question, and do not hesitate 
to contact me if you have more questions.

Diego

Xavier Dequaire wrote:

>I'd like to introduce a shading device: this is an internal fabric curtain.
>
>I found out how much % of the window making the sunspace is covered.
>
>But the curtain is not Black but "dirty off-white, it has reflection
>absorbtivity and transmittance.
>
>I read somewhere in the doc that it is discussed but
>How do I assess that and where do I input it in the type 56 or somewhere
>else?
>
>
>Xavier D.
>  
>
-- 

Diego A. Arias
TRNSYS Coordinator
Solar Energy Laboratory
University of Wisconsin - Madison