[TRNSYS-users] Type64 Shading Masks
David BRADLEY
d.bradley at tess-inc.com
Tue Apr 1 10:06:32 PDT 2014
Cédric,
Type64 assumes that the surface that contains the opening forms part
of the mask. For example, if the opening is in a vertical surface then
the opening can't "see" behind itself so in effect it has an infinitely
tall mask for all surface angles behind the opening. You'll notice that
in your table below, the output of Type15 and the output of Type64 is
the same when you have a horizontal surface. In the other two cases (30°
and 45° tilt) there is some difference because the surface itself
creates a mask.
Best,
David
On 4/1/2014 10:39, PAULUS Cedric 217865 wrote:
>
> Dear TRNSYS users,
>
> I would like to have more information about the output 7 to 11 from
> type64. I thought it was the radiation on horizontal taking into
> account the mask.
>
> I try with a mask file that has NO MASK and the irradiation on
> horizontal change with the tilt and is different from the irradiation
> on horizontal that is provide as input of type 64. See the table below :
>
>
>
> Type 15 (input type 64)
>
>
>
> Output type 64
>
>
>
> Difference
>
> TIME
>
>
>
> Total Irradiation on horizontal
>
>
>
> Beam irradiation on horizontal
>
>
>
> Total diffuse irradiation on horizontal
>
>
>
> Total Irradiation on tilt surface
>
>
>
> Beam irradiation on tilt surface
>
>
>
> Total diffuse irradiation on tilt surface
>
>
>
> Total Irradiation on horizontal
>
>
>
> Beam irradiation on horizontal
>
>
>
> Total diffuse irradiation on horizontal
>
>
>
> Total Irradiation on tilt surface
>
>
>
> Beam irradiation on tilt surface
>
>
>
> Total diffuse irradiation on tilt surface
>
>
>
> Total Irradiation on horizontal
>
>
>
> Beam irradiation on horizontal
>
>
>
> Total diffuse irradiation on horizontal
>
>
>
> Total Irradiation on tilt surface
>
>
>
> Beam irradiation on tilt surface
>
>
>
> Total diffuse irradiation on tilt surface
>
> Tilt 45° (input7)
>
>
>
> 4 193 276.05
>
>
>
> 1 947 898.25
>
>
>
> 2 245 377.80
>
>
>
> 4 807 723.85
>
>
>
> 2 449 319.72
>
>
>
> 2 358 404.13
>
>
>
> 3 739 425.12
>
>
>
> 1 938 636.13
>
>
>
> 1 800 788.99
>
>
>
> 4 807 695.74
>
>
>
> 2 449 291.61
>
>
>
> 2 358 404.13
>
>
>
> 453 850.94
>
>
>
> 9 262.12
>
>
>
> 444 588.81
>
>
>
> 28.11
>
>
>
> 28.11
>
>
>
> -
>
> Tilt 30°
>
> (input7)
>
>
>
> 4 193 276.05
>
>
>
> 1 947 898.25
>
>
>
> 2 245 377.80
>
>
>
> 4 836 905.84
>
>
>
> 2 439 304.04
>
>
>
> 2 397 601.80
>
>
>
> 3 846 810.79
>
>
>
> 1 940 710.97
>
>
>
> 1 906 099.82
>
>
>
> 4 836 818.98
>
>
>
> 2 439 217.18
>
>
>
> 2 397 601.80
>
>
>
> 346 465.26
>
>
>
> 7 187.28
>
>
>
> 339 277.98
>
>
>
> 86.86
>
>
>
> 86.86
>
>
>
> -
>
> Tilt 0° (Horizontal)
>
> (input7)
>
>
>
> 4 193 276.05
>
>
>
> 1 947 898.25
>
>
>
> 2 245 377.80
>
>
>
> 4 192 998.65
>
>
>
> 1 947 898.25
>
>
>
> 2 245 100.40
>
>
>
> 4 193 216.91
>
>
>
> 1 947 898.25
>
>
>
> 2 245 318.66
>
>
>
> 4 192 998.65
>
>
>
> 1 947 898.25
>
>
>
> 2 245 100.40
>
>
>
> 59.14
>
>
>
> -
>
>
>
> 59.14
>
>
>
> -
>
>
>
> -
>
>
>
> -
>
> Do you have any explanation ?
>
> Best regards,
>
>
>
> *Cédric Paulus*
>
> Chef de Projets
>
> Département Thermique Biomasse et Hydrogène
>
> Service Biomasse et Réseaux Thermiques
>
> Laboratoire Système Solaire Haute Température
>
> Commissariat à l'énergie atomique et aux énergies alternatives
>
> 50 avenue du Lac Léman *|*F-73377 Le Bourget-du-Lac
>
> T. +33 (0)4 79 79 21 17 *|*F. +33 (0)4 79 62 13 74
>
> cedric.paulus at cea.fr <mailto:cedric.paulus at cea.fr>
>
> website :http://www.ines-solaire.org <http://www.ines-solaire.org/>-
> http://www.liten.fr <http://www.liten.fr/>
>
> Pensez à l'environnement, n'imprimez cet email que si c'est vraiment
> nécessaire.
>
>
>
> _______________________________________________
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--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com
http://www.tess-inc.com
http://www.trnsys.com
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