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Re: [TRNSYS-users] Load definition in Type56
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@transsolar.com
Web: www.trnsys.de
-----Ursprüngliche Nachricht-----
Von: TRNSYS-users [mailto:trnsys-users-bounces@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@transsolar.com
> Web: www.trnsys.de
>
>
> -----Ursprüngliche Nachricht-----
> Von: TRNSYS-users [mailto:trnsys-users-bounces@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@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@transsolar.com
> Web: www.trnsys.de
>
>
> -----Ursprüngliche Nachricht-----
> Von: TRNSYS-users [mailto:trnsys-users-bounces@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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