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Matias,<br>
You might need to be careful about the diffuse sky model that you are
using. I believe that Type30 assumes an isotropic sky and that your
weather component (Type15 or Type109) needs to be set accordingly. I
doubt, however, that the sky model would explain such a dramatic drop
in power output so I would recommend that you send your input file to
your distributor to see if they can offer you some assistance and check
to make sure that there is not an error in the connections. <br>
<br>
I might also add that calculating the effects of shading on a PV is a
bit complicated. The problem is that if you completely shade even a
small part of a PV array, the shading creates an open-circuit in the
array and power production drops off very dramatically. Type30 assumes
that there is a linear behavior between shading and thermal performance
(it was written with rows of solar thermal collectors in mind) and PV
shading is very non-linear. If you have access to the TESS Green
Building Library, there is a PV shading component in there that uses
basically the same algorithms as Type30 but makes some improved
assumptions about the effect of the shading on the PVs. It also allows
some configurations if the PVs are oriented on a vertical field instead
of on a horizontal field.<br>
<br>
Kind regards,<br>
David<br>
<br>
<br>
Matias Garcia wrote:
<blockquote
cite="mid:ae1a212b0901270748g4c172a91m75f8cbdeac01ace7@mail.gmail.com"
type="cite">Hi!<br>
I want to see the effect of the shadows produced by the collectors in a
photovoltaic installation. When I connect the type 30a to the PV array
the power I obtain from the array is incredible small, it could have
some common sense if I multiply it by ten. If I introduce in type 30a a
very big distance (800m) between the modules, the problem is the same
and the power comes very small (divided by ten). Only without type 30a
I obtain a normal power production.<br>
Can any one help me?<br>
I am new here so, hello to everyone!<br>
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