[TRNSYS-users] Floor QABSO value

Wed Mar 2 04:26:51 PST 2011

Dear Mr. Carlos Marfil!

The QABSI my be the case due to radiative parts of the heating or internal
gains. (Du You have such gains)
The QABSO always get radiation de to the ground reflectance in the weather
processor (only when defined as "external")

The inside-surface of a building element (Wall) is always part of the zone
(airnode) where the surface is listed (Zone-window).
The condition on the outside surface are defined at the boundary condition
(defined in the zone window).
The order of the different wall layers with respect to in- and
outside-surface You can see in the "wall type manager".

I hope this helps!

With kind regards,
    Matthias Kersken

---

Dipl.-Ing. Matthias Kersken
Wissenschaftlicher Mitarbeiter / Abteilung Energiesysteme

Fraunhofer-Institut für Bauphysik 
Institutsteil Holzkirchen

Fraunhoferstraße 10
83626 Valley

eMail: Matthias.Kersken at ibp.fraunhofer.de
Telefon 08024 / 643-204
Telefax 08024 / 643-366
www.ibp.fraunhofer.de <http://www.ibp.fraunhofer.de/> 

Dipl.-Ing. Matthias Kersken
Research Associate / Department Energy Systems 

Fraunhofer Institute for Building Physics 
Branch Holzkirchen

Fraunhoferstraße 10
D-83626 Valley

eMail:  <mailto:Matthias.Kersken at ibp.fraunhofer.de>
Matthias.Kersken at ibp.fraunhofer.de
Phone +49 8024 / 643-204
Fax +49 8024 / 643-366
 <http://www.ibp.fraunhofer.de/> www.ibp.fraunhofer.de

---

  _____  

Von: Claros Marfil, Luis Jesus [mailto:Centag51 at acciona.es] 
Gesendet: Mittwoch, 2. März 2011 11:21
An: trnsys-users at cae.wisc.edu
Betreff: [TRNSYS-users] Floor QABSO value

Dear TRNSYS Users,

After analyzing QABSI (NTYPE 21) and QABSO (NTYPE 22)  outputs in a
Multizone building (TYPE 56), I get similar values for absorbed radiation in
the floor and in the different facades. Since I have no windows, I don’t
understand why these QABSI and QABSO floor values are so high.

I would like to know which is the right way to indicate TRNSYS that a
horizontal surface inside a building (interior floor) should not have any
solar radiation since there is not any window.

I have already indicated a view fac. to sky=0, but I get the same results.

Thanks in advance,

Luis J. Claros Marfil

Centro Tecnológico I+D+i  - R & D Technology Center

ACCIONA Infraestructuras

Valportillo II, nº8
C.P. 28108 Alcobendas (Madrid) 
Tel.: +34  91 791 20 20
Fax: +34  91 791 21 01
centag51 at acciona.es
www.acciona-infraestructuras.es

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