[TRNSYS-users] Load definition in Type56

[hotline]

Hi.

Depends on what you like to model.

E.g. 
if you are model an All-Air System you can set the convective part to 100 %, in that case you can use Q_Sens as load
that needs to be handled by the supply air (only valid for recirculation air). 

if you are model a system with radiative components you can model the supplied air with ventilation types and use
Q_Vent instead (only valid for recirculation air).

Best

__________________________________________________________________________________________________

Jochen Lam
TRNSYS Software Team

Transsolar Energietechnik GmbH
Curiestraße 2
70563 Stuttgart
Fax:        +49 711 67976-11
Email:    jlam at transsolar.com
Web:      www.trnsys.de 


-----Ursprüngliche Nachricht-----
Von: TRNSYS-users [mailto:trnsys-users-bounces at lists.onebuilding.org] Im Auftrag von C K Lee
Gesendet: Donnerstag, 21. August 2014 03:24
An: TRNSYS users mailing list at OneBuilding.org
Betreff: Re: [TRNSYS-users] Load definition in Type56

Hello.

Thanks for the clarification.  I just have one more query.  According to Eq. 5.4.1-1, only the convective heat transfer affects the node air temperature change.  In this regard, should I not use Q_SENS as the sensible building load that should be handled by the supply air?  What other output parameter should I use instead?  Please advise.

Best Regards
Chun Kwong LEE

On 2014-08-20 19:17, hotline wrote:
> Juan Francisco,
> 
> You're right Q_SENS is part of the energy balance of the zone. As the 
> system boundary of the zone energy balance includes the inside surface 
> nodes, all radiative heat fluxes are taken into consideration.
> See p.5-45 in the TRNSYS manual for further explanation.
> 
> Best
> ______________________________________________________________________
> ____________________________
> 
> Jochen Lam
> TRNSYS Software Team
> 
> Transsolar Energietechnik GmbH
> Curiestraße 2
> 70563 Stuttgart
> Fax:        +49 711 67976-11
> Email:    jlam at transsolar.com
> Web:      www.trnsys.de
> 
> 
> -----Ursprüngliche Nachricht-----
> Von: TRNSYS-users [mailto:trnsys-users-bounces at lists.onebuilding.org]
> Im Auftrag von JUAN FRANCISCO BELMONTE TOLEDO
> Gesendet: Mittwoch, 20. August 2014 12:15
> An: TRNSYS users mailing list at OneBuilding.org
> Betreff: Re: [TRNSYS-users] Load definition in Type56
> 
> I am not sure if I have completely understood this answer.
> Q_sens is not based on an energy balance performed on the zone air?...
> where is the radiative part there?.
> 
> Regards.
> Juan Francisco Belmonte
> 
> -----Mensaje original-----
> De: TRNSYS-users [mailto:trnsys-users-bounces at lists.onebuilding.org]
> En nombre de hotline Enviado el: miércoles, 20 de agosto de 2014 11:53 
> a.m.
> Para: 'TRNSYS users mailing list at OneBuilding.org'
> Asunto: Re: [TRNSYS-users] Load definition in Type56
> 
> Yes Q_SENS includes both the radiative and the convective parts.
> 
> Best
> 
> ______________________________________________________________________
> ____________________________
> 
> Jochen Lam
> TRNSYS Software Team
> 
> Transsolar Energietechnik GmbH
> Curiestraße 2
> 70563 Stuttgart
> Fax:        +49 711 67976-11
> Email:    jlam at transsolar.com
> Web:      www.trnsys.de
> 
> 
> -----Ursprüngliche Nachricht-----
> Von: TRNSYS-users [mailto:trnsys-users-bounces at lists.onebuilding.org]
> Im Auftrag von C K Lee
> Gesendet: Mittwoch, 20. August 2014 08:05
> An: Trnsys discussion group
> Betreff: [TRNSYS-users] Load definition in Type56
> 
> Dear all.
> 
> Can anyone advise if the output QSENS (NType 2) include both 
> convective and radiative loads?  Thank you!
> 
> Best Regards
> Chun Kwong LEE
> City University of Hong Kong
> 
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