[TRNSYS-users] energy balance of air in zone

[karol.bandurski at put.poznan.pl]

Yes! Thank you! Sorry for I overlooked it..

 

Karol

 

From: Marion Hiller <> 
Sent: Monday, May 30, 2022 12:55 PM
To: TRNSYS users mailing list at OneBuilding.org
<trnsys-users at lists.onebuilding.org>
Subject: Re: [TRNSYS-users] energy balance of air in zone

 

Dear Karol,

 

I assume there is a misunderstanding of NTYPE 8 (DQAIR) (see
05-MultizoneBuilding.pdf)

NType 8 is the sensible change in internal energy of air in airnode since
the beginning of the simulation.

 

Therefore, instead of using NType8(at time = current timestep) you need to
use the following term:

   NType8(at time = current timestep) - NType8(at time = previous timestep).

 

If you look at your xls SUM is always "equal" to - (dtC_dtau ) of the
previous line.

 

Best,

 

Marion

 

Transsolar Software Team

hotline at transsolar.com <mailto:hotline at transsolar.com> 

 

Transsolar 

Stuttgart | Munich | Paris | New York

 

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CEO: Matthias Schuler, Thomas Auer, Stefan Holst, Dieter Schnelle 

Registered at Amtsgericht Stuttgart HRB 23347 | USt-IdNr.: DE 152272639

 

 

Von: TRNSYS-users <trnsys-users-bounces at lists.onebuilding.org
<mailto:trnsys-users-bounces at lists.onebuilding.org> > Im Auftrag von
karol.bandurski--- via TRNSYS-users
Gesendet: Montag, 30. Mai 2022 10:09
An: trnsys-users at lists.onebuilding.org
<mailto:trnsys-users at lists.onebuilding.org> 
Cc: karol.bandurski at put.poznan.pl <mailto:karol.bandurski at put.poznan.pl> 
Betreff: [TRNSYS-users] energy balance of air in zone

 

Dear All,

I have generated thermal balance of air in zone, I use for it:

*	QCSURF, NTYPE3 (convection from surfaces),
*	QGCONV, NTYPE 7 (convection internal heat gains),
*	QINF, NTYPE 4 (infiltration),
*	QVENT+QCOUP, NTYPE5+ NTYPE6 (ventilation form system and other
rooms),
*	-QSENS-QRHEAT, - NTYPE2- NTYPE 78 or QHEAT-QCOOL-QRHEAT, NTYPE30-
NTYPE31- NTYPE78 (heating and cooling system without radiation part),
*	DQAIR, NTYPE 8 (change of air internal energy).

 

But the balance is not equal zero (enclosed).

 

I would be grateful for any tips.

 

Best,
Karol

 

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

Karol BANDURSKI Ph.D, Assistant Professor    

Faculty of Environmental and Energy Engineering 

Division of Heating, Air Conditioning and Air Protection 

Poznan University of Technology

 <https://www.researchgate.net/profile/Karol_Bandurski>
https://www.researchgate.net/profile/Karol_Bandurski

***

dr inż. Karol BANDURSKI, Adiunkt

Wydział Inżynierii Środowiska i Energetyki

Zakład Ogrzewnictwa, Klimatyzacji i Ochrony Powietrza

Politechnika Poznańska

 

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