Dear TRNsys users,
I apologize in advance
as this subject was already discussed one year ago, but I
think some more explanation could help me to go further in
my study.
(http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/2018-November/030610.html)
I’m trying to calculate
the Effective Radiant Field of an occupant, based on TRNsys
outputs. To complete the calculation, I need the total
diffuse solar radiation entering the airnode through
glazing, as well as the total direct radiation. Not being
sure of what output I should choose, I compared :
-
Total
tilted surface radiation (which I assumed to be the total
direct and diffuse solar radiation arriving on the window)
-
QSOLTR
(which I assumed to be the total shortwave solar radiation
transmitted through the window to the airnode)
-
QTABSI
(which I assumed to be the total radiation transmitted to
the airnode)
-
QTSGL
(which I assumed to be the total solar radiation passing
from outside surface of the window to the airnode)
According to the
results, at day time, so when there is solar radiation,
Total tilted surface is below the others. So it means,
according to what I see, that solar radiation is bigger
after going through the window. After those results, it’s
difficult to say I understood well what I am doing…
Could you help me to
understand those outputs and advise me on the output to
choose for “total diffuse solar radiation entering the
airnode” and “total direct solar radiation entering the
airnode”?
Marion mentioned to use
“QSOLTR-QTSOUT”. That would be ok for me, but why is QSOLTR
bigger than total tilted surface radiation?
Again, I’m really sorry
for digging out that topic again but I do think my
interpretation is very bad at the moment.
Thank you in advance for
your help.
Wirich FREPPEL
Development engineer, PhD
COSMOS -
Buildings Energy Performance &
Daylighting Group
Cell: +33 637 053 174
Saint-Gobain
Research Compiègne