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

[Fabien Morice]

Thanks Diego
But could you tell me more ?
How can I connect the type 67 with the type 56a ? (Which output)
And if I want tu use type 67, type 56a and type 34 ?
Have you an example for me ?

Fabien Morice


----- Message d'origine ----
De : Diego A. Arias <daarias at wisc.edu>
À : Fabien Morice <fabien.morice at yahoo.fr>
Cc : trnsys-users at engr.wisc.edu
Envoyé le : Vendredi, 9 Mars 2007, 17h17mn 11s
Objet : Re: [TRNSYS-users] About Shading masks (type 67) and Overhang and wingwalls shading (type 34)


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.*
>
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>   


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


	

	
		
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