[TRNSYS-users] bug in type 34?

[Diego A. Arias]

Dear Adriana,

You are right, the total radiation should consider the ground view 
factor.  This will be included in the next release.
Best regards,

Diego

Adriana Angelotti wrote:

> Dear trnsys users and developers,
>
> by checking type 34 (Overhang and Wingwall Shading) I found a possible 
> bug in the calculation of the global radiation incident on a vertical 
> unshaded surface.
>
> It's calculated as:
>
>     GTOT=(GB+GD*0.5d0+RHO*GR)    (with GB=beam rad; GD= diffuse rad on
>     horizontal; GR=total rad on horizontal)
>
> while I think there should be a ground view factor=0.5 taken into 
> account, so that:
>
>     GTOT=(GB+GD*0.5d0+0.5d0*RHO*GR)
>
> GTOT is used in the fraction of solar shading calculation.
>
> Is there anybody who can say what is right?
>
> Thanks in advance
>
> Adriana
>
>
>
>
> --------------------------------------------------------------------------------------------------
> Adriana Angelotti
> Politecnico di Milano
> Dipartimento di Scienza e Tecnologie dell'Ambiente Costruito (Best)
> v. Bonardi 3
> 20133 Milano, Italy
> Ph    +39 02.2399.5183
> Fax  +39 02.2399.5118
> e-mail adriana.angelotti at polimi.it
>
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