Re: [TRNSYS-users] concave zone - radiation calculation

[Marion Hiller <Hiller@Transsolar.com>]

Karol,

for simulating a concave zone with all three radiation modes set to detailed the following matrices are required:

a) Beam radiation distribution
    You need an ISM matrices for the zone which matches the SMH matrix.
 
b) Diffuse radiation distribution
     View factor matrix is needed.

c) Longwave radiation exchange within a zone
    View factor matrix is needed.

We do have an approach generating a view factor matrix for a concave zone based on the program view3d. 
It works for many geometries. Very small surfaces may cause problems. 
As alternative you can create a view factor matrix with a different program but the matrix need to "correct". 
Otherwise energy can be generated or vanished.

For the ISM generation we do not have a general solution. Do have solar radiation in your zone?
You may send your model to hotline@transsolar.com we may help your finding a solution.

Kind regards,

Marion


-----Ursprüngliche Nachricht-----
Von: TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org] Im Auftrag von Karol Bandurski via TRNSYS-users
Gesendet: Freitag, 9. Februar 2018 07:18
An: trnsys-users@lists.onebuilding.org
Cc: Karol Bandurski <karol.bandurski@put.poznan.pl>
Betreff: [TRNSYS-users] concave zone - radiation calculation

Dear All,

If I would like to set both three radiation calculation mode on detailed, but my zone is not convex, could I just prepare .vfm file on my own?
Is it possible such approach?
Is there need for some other work to give appropriate data to TRNSYS?

Kind regards,
Karol

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