[esp-r] Re: Obstructions

[Achim Geissler]

… what types of building and what types of high performance glass are you thinking about? Typically, you will not be able to achieve solar protection by the glass alone due to daylight transmission requirements. You can design solar altitude dependant direct shading with external blinds, but not – to my knowledge – with glazing … 

 

On the other hand, if you succeed in blocking out the radiation with the glass alone, why should the internal lite of an IGU heat up excessively? Where are you located? In central Europe, triple insulating glazing is (not so slowly) becoming the standard. U-values in the range of 0.5 to 0.7 are thus “daily bread”. If you manage to block the radiation in the outermost lite, I would guess that your internal surface temperatures will be acceptable.

 

Best regards

Achim

 

From: esp-r-bounces at lists.strath.ac.uk [mailto:esp-r-bounces at lists.strath.ac.uk] On Behalf Of Diaz, Camilo
Sent: Sonntag, 19. April 2009 14:23
To: esp-r at lists.strath.ac.uk
Subject: [esp-r] Re: Obstructions

 

Dear all, a separate but related issue. Has anyone compared in esp-r the effect of external shading versus high performance glass? Has glazing technology improved so much these days that external shading devices will soon be a thing of the past? Perhaps in terms of cooling loads yes but what about comfort? In my book no matter how good the glass is, if exposed to incident radiation, it will heat up and raise its surface temperature, the MRT and eventually the overall resultant temperature of the room. Any views welcome.
Thanks 



Camilo Diaz 
WSP Energy &Environment Ltd 
07713985845 

  _____  

From: esp-r-bounces at lists.strath.ac.uk 
To: Felipe Durán ; esp-r at lists.strath.ac.uk 
Sent: Sat Apr 18 14:48:48 2009
Subject: [esp-r] Re: Obstructions 

"The shading and insolation module (ish) provides
facilities to calculate shading patterns on exterior
surfaces and the insolation distribution across the
inside surfaces of a zone."

So yes, you need to run it for every zone that may be influenced by your obstruction.

When you change an obstruction, it will prompt you to rerun shading calcs either silently or interactively.

If this turns out to be too complicated, it is possible to approximate shading by running one or two zones in each orientation and interpolating between them without too much loss of accuracy. We do this externally; it might be possible to do in ESP-r for identical zones by assigning shading files to multiple zones.

Ralph.


-----Original Message-----
From: esp-r-bounces at lists.strath.ac.uk on behalf of Felipe Durán
Sent: Fri 4/17/2009 20:48
To: esp-r at lists.strath.ac.uk
Subject: [esp-r]  Obstructions

Dear All,

I am modelling an obstruction representing an horizontal shading 
device of a window.
when the model is done, Do I have to run the ish module? Do I have to 
run it for the particular zone or for all the zones of the model?

When I try to simulate ESP-r tells me that "Some zones have missing or 
corrupt shading files. The model not yet complete vis-a-vis thermal 
simulation." What does it means?

Thank you in advance,

kind regards,

Felipe Durán Palma
Arquitecto PUC, MPhil. U. Cambridge
Director de Proyectos y Asesorías



Obispo Donoso 5 oficina 62 - Providencia - Santiago
felipe at b-green.cl - www.b-green.cl - 56 (2) 3431868







This message has been scanned by MailController - www.MailController.altohiway.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.strath.ac.uk/archives/esp-r/attachments/20090420/4a5dd5e4/attachment.html