[TRNSYS-users] NType 904 -what's going on with equation

[Marion Hiller]

Karol,

 

you use the wrong signs fort he terms in your balance.

Pease check the SIGNs  + and – given in the equation for the balance
(also see 05-MultizoneBuilding.pdf)

 

Marion

 

Dipl.-Ing. Marion Hiller 
TRANSSOLAR: KlimaEngineering - Technologien für energieeffizientes Bauen
und Nutzerkomfort in Gebäude 
Munich - New York - Stuttgart + 49.711.67976.0 

Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart 
Amtsgericht Stuttgart - HRB 23347, Steuernummer 99073/00911, USt-IdNr.:
DE152272639

Geschäftsführer: Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas Auer,
Dipl.Phys. Stefan Holst, Prof. Dipl.-Ing. Bleicher 

 

 

  _____  

Von: Karol Bandurski [mailto:karol.bandurski at put.poznan.pl] 
Gesendet: Montag, 21. November 2011 13:02
An: trnsys-users at cae.wisc.edu
Betreff: [TRNSYS-users] NType 904 -what's going on with equation

 

Hi,

 

Could somebody explain me how it is possible:

 

I get file SUMMARY.BAL (enclosed) as a result of NType 904, and there is
such equation:

BAL_ENERGY= -DQAIRdt  +QHEAT     -QCOOL    +QINF      +QVENT
+QCOUPL    -QTRANS  +QGAININT  +QWGAIN    +QSOLGAIN

 

But I calculate BAL_ENERGY in excel (enclosed), the same way, for each
zone, and result are completely different!!!???

 

How it is possible?

 

Have I done something wrong?

 

Regards,

 

Karol

------------------------------------------------

Karol Bandurski MSc.

Institute of Environmental Engineering

Poznan University of Technology

www.ee.put.poznan.pl

www.put.poznan.pl

 


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