Michaël,
your overview explains
the balance of an external opaque surface very well.
The only “missing”
feature is the surface gain on the “outside face”.
This gain is included in
QABSO (NTYPE 22 ). Therefore, QABSO isn’t “short wave
radiation” only if a surface gain on the “outside face” is
defined.
Marion
Transsolar
Energietechnik GmbH | Curiestrasse 2 | 70563 Stuttgart |
Germany
CEO:
Matthias Schuler, Thomas Auer, Stefan Holst, Dieter
Schnelle
Registered
at Amtsgericht Stuttgart HRB 23347 | USt-IdNr.: DE
152272639
Kan,
I struggled with those
Type 56 outputs recently and I came up with the attached
interpretation.
I hope this helps, and I
hope someone from Transsolar will correct me if I
misinterpreted some outputs.
Michaël Kummert
Polytechnique Montréal
Many
thanks David for your response and clarification!
QIBAB
and QIDAB would address shortwave absorption. What about the
longwave exchange?
I
am currently working under the following assumptions:
To
get the radiative gains for the internal/indoor wall’s
surface = radiative airnode internal gains received by
wall (assumed to be given by QRGAB) + solar gains through
zone windows received by walls ( assumed as QIBAB + QIDAB or
QSIAB as a total?) + longwave radiation exchange between
this wall and all other walls and windows (QABSILW? not sure
about this one).
Your
clarification is greatly appreciated!
Best regrads,
Kan
Kan,
I often use QIBAB and QIDAB (NTypes 80
and 81). Those are the quantities of radiation absorbed (as
opposed to incident) on the inside surface, however.
Wall gains are specified as totals, not
per square metre.
kind regards,
David
On 04/09/2021 05:15,
K.R. Gunawardena via TRNSYS-users wrote:
Hi,
I am trying to get clarification on a couple
of issues.
I am trying to couple a bespoke component
with Type 56 to calculate surface evaporative flux. I want
to input the net radiation received on a specific internal
surface as an input to this component. Which trnsys output
best represents the net radiation energy received by an
internal surface?
Second, when specifying a wall gain, do we
provide the value for the entire wall or m^2?
Answers are greatly appreciated,
Best regards,
Kan
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