[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [TRNSYS-users] Chilled Ceiling QCOMI

Dear Mr. Vazquez!
 
QCOMI contains only convection and IR-exchange to other surfaces of the zone.
Solar gains (diffuse radiation for a ceiling), IR-energy from internal Heat sources (Heating, artificial lightning, ...) and wallgains are NOT included. This energy flows are calculation in QABSI.
(Manual 5-26)
In order to have a complete energy balance for Your ceiling You should compare the sum (attention! +/-) of this values with Your cooling demand.
 
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@ibp.fraunhofer.de
Telefon 08024 / 643-204
Telefax 08024 / 643-366
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: Matthias.Kersken@ibp.fraunhofer.de
Phone +49 8024 / 643-204
Fax +49 8024 / 643-366
www.ibp.fraunhofer.de

 

 

 

 

 

 

 

 

 

 

 

 

 

---

 

Von: Mavi Cambronero Vázquez [mailto:maviqnk@gmail.com]
Gesendet: Freitag, 19. November 2010 10:52
An: trnsys-users@cae.wisc.edu
Betreff: [TRNSYS-users] Chilled Ceiling QCOMI

Hi,
 
Something wrong is happening when I run my simulation with a chilled ceiling. Until now I though the output QCOMI was the energy from the room to the wall and it should be similar to the demand of cooling of my room. Why are so different QCOMI and the theorical calculation:
 
Energy = flow_ceiling*cp_water*(Texit_water-Tentry_water)?
 
THanks

Attachment: smime.p7s
Description: S/MIME cryptographic signature