[TRNSYS-users] About Shading masks (type 67) and Overhang and wingwalls shading (type 34)

[Diego A. Arias]

Hi Fabien,

You do not need to use Type34 in combination with Type67.  Type 67 was 
created to avoid the problem that you found in the mailing list: having 
to use two instances of Type 68.  My answer to Amelie was before Type67 
was available.
Best regards,

Diego


Fabien Morice wrote:
> Dear TRNSYS users, I have some questions for you :
>  
> 1°)    I try to use the type 67 with the type 56a (Multizone Building).
>         But, it seems to me that I *_must_* used the type 34 in 
> complement.
>         [Output 11 of type 34 (Fraction of solar shading) ---> Input 
> of type 56a (created by me to used in Input of External Shading Factor)]
>         because the type 67 gives me 2 outputs (among 11) :
>         [Output 7 of type 67 (Fraction of beam visible on horizontal 
> for mask) ---> ?
>         [Output 9 of type 67 (Fraction of diffuse visible on 
> horizontal for mask) ---> ?
>         that I don't know used with the type 56a directly. 
> 2°)   I have read the files of the forum and I try  the solution 
> proposed by Diego (Wed Oct 26 2005) to Amelie Mariller
>         who recommend to use two type 68 (one horizontal and one 
> vertical) with each type 34.
>         So, I have created two files in ".dat" :
>         the first with a slope of 0°
>         and the second with a slope of 90°.
>         The two files dividing the same others informations.
>         But I have the message : Error "Unable to read mask file, 
> please check file syntax and format." when I launch the calculs.
>  
> 3°)    So, I use only one type 68 with one type 34 :
>        
>         [Output 3 of type 67 Shaded beam radiation for surface ---> 
> Input 5 of type 34 (Beam radiation on surface)]
>         [Output 10 of type 67 Shaded diffuse radiation on horizontal 
> for mask ---> Input 4 of type 34 (Horizontal diffuse radiation)]
>         [Output 11 of type 67 Shaded total radiation on horizontal for 
> mask ---> Input 3 of type 34 (Total horizontal radiation)]
>  
>         Parameter 1 of type 34 Upstream component mode = 1 and not 0
>  
>         In more, I use two Equations :
>  
>         a)    Equation 1 :
>  
>                 Sky diffuse radiation on titled surface i (Output of 
> type 109)
>                                             +
>                 Groung reflected diffuse radiation on titled surface i 
> (Output of type 109)
>                                             =
>                 Diffuse radiation for opening (Input 6 of type 67)
>  
>         b)    Equation 2 :
>  
>                 Sky diffuse radiation on horizontal
>                                             +
>                 Groung reflected diffuse radiation on horizontal
>                                             =
>                 Diffuse radiation on horizontal (Input 4 of type 69b 
> and Input 4 of type 67)
>  
>         After simulation, I have controlled the five View factor 
> (Outputs 6,7,8,9,10 of type 34) by Online plotter (type 65d)
>         and I'm surprise because the sum is not equal to 1 !
>         But if I change :       
>         Parameter 1 of type 34 Upstream component mode = 0 and not 1
>         the sum is correct.
>  
>        * Anyone knows what I should do? Thanks.*
> ** 
> *Fabien Morice.*
>
> ------------------------------------------------------------------------
> Découvrez une nouvelle façon d'obtenir des réponses à toutes vos 
> questions ! Profitez des connaissances, des opinions et des 
> expériences des internautes sur Yahoo! Questions/Réponses 
> <http://fr.rd.yahoo.com/evt=42054/*http://fr.answers.yahoo.com>.
> ------------------------------------------------------------------------
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at engr.wisc.edu
> https://www.cae.wisc.edu/mailman/listinfo/trnsys-users
>   


-- 
Diego A. Arias
TRNSYS Coordinator
Solar Energy Laboratory
University of Wisconsin - Madison
1500 Engineering Drive
Madison, WI 53706