[TRNSYS-users] Simulating a double skin facade with interior blinds

Wed Oct 6 00:31:23 PDT 2010

David,

Thanks for your answer,

In the Window Manager I can change the properties of shading devices(Transmittance, Reflectance, Absorptance).
What if I neglect the amount of Solar Energy being reflected back to the shading system from an interior window? Would there be a significant impact on the thermal behavior of the space?

Secondly, as you say, the mass of the shading device is ignored, but with the given absorptance it should pass on the energy to the air node of the space, right?

BR,
Florian

FLORIAN STIFT, DI(FH)
Energy Department
Sustainable Building Technologies

AIT Austrian Institute of Technology
Österreichisches Forschungs- und Prüfzentrum Arsenal Ges.m.b.H.
Giefinggasse 2 | 1210 Vienna | Austria
T +43(0) 50550-6277 | M +43(0) 664 815 79 46 | F +43(0) 50550-6613
florian.stift at ait.ac.at<mailto:florian.stift at ait.ac.at> | http://www.ait.ac.at
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Von: David BRADLEY [mailto:d.bradley at tess-inc.com]
Gesendet: Dienstag, 05. Oktober 2010 18:01
An: Stift Florian
Cc: TRNSYS-users
Betreff: Re: [TRNSYS-users] Simulating a double skin facade with interior blinds

Florian,
  I have spoken to a colleague about writing a model of an operable shading device that is trapped between two pieces of glass. Neither one of us is aware of such a model and neither one of us was too confident in the idea of creating a thermal zone for such a narrow double facade space. TRNBuild/Type56 allows the user to specify an internal shading device on windows (whether EXTERNAL or ADJACENT) but the mass of the shading device is ignored and the shading device is assumed to be open to the zone on the inside (ie not trapped within the two pieces of glass).
Kind regards,
 David

On 10/4/2010 08:16, Stift Florian wrote:
Dear TRNSYS - Community,

I have a question about simulating a façade system with shading elements.

I need to simulate an office room with a double skin façade (not ventilated) with an interior shading system.
The shading system has a very complex geometry, so which inputs would be needed to model the shading system, and how does TRNSYS deal with the mass of the blinds, heating up the space between the glass panes.

Thanks for your help,

FLORIAN STIFT, DI(FH)
Energy Department
Sustainable Building Technologies

AIT Austrian Institute of Technology
Österreichisches Forschungs- und Prüfzentrum Arsenal Ges.m.b.H.
Giefinggasse 2 | 1210 Vienna | Austria
T +43(0) 50550-6277 | M +43(0) 664 815 79 46 | F +43(0) 50550-6613
florian.stift at ait.ac.at<mailto:florian.stift at ait.ac.at> | http://www.ait.ac.at
FN: 165088b HG Wien | UID: ATU46577208 This email and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient, please notify the sender by return e-mail or by telephone and delete this message from your system and any printout thereof. Any unauthorized use, reproduction, or dissemination of this message is strictly prohibited. Please note that e-mails are susceptible to change. Österreichisches Forschungs- und Prüfzentrum Arsenal Ges.m.b.H. shall not be liable for the improper or incomplete transmission of the information contained in this communication, nor shall it be liable for any delay in its receipt.

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