[esp-r] Re: Air gap resistance too small-message

[Jon Hand]

To help answer this question it would be useful to see what the entries
for the two constructions look like.  Would it be possible to paste into
the email the text from the model constructions database?

ESP-r's treatment of air gaps uses three air gap resistances - one for horizontal
surface, one for vertical surfaces and one for sloped surfaces.  A typical non-argon
filled value for a 12mm air gap might be something like 0.17.

What values were you entering for the air gap resistances?

-Jon Hand
________________________________________
From: esp-r-bounces at lists.strath.ac.uk [esp-r-bounces at lists.strath.ac.uk] On Behalf Of Marco Jacobs [mgjm.jacobs at gmail.com]
Sent: 02 June 2010 09:27
To: esp-r at lists.strath.ac.uk
Subject: [esp-r]  Air gap resistance too small-message

Dear all,

As a new user of ESP-r, I'm having difficulties when defining new materials and constructions.
I have added new constructions for a window and a glass facade, both divided in an outer glass sheet, a cavity with an Argon filling, and another glass sheet.
Now I get the message: "Air gap resistance too small in zone X, surface Y, gap Z, please increase!"
When looking back at my zone definitions, the indicated surfaces are all glass/window surfaces. I had the same problem with my outer wall definition, but changing the conductivity up, and finally back down to the desired value was enough to solve this.
I have tried the same for the window constructions, but it doesn't seem to help. What exactly is the problem, and how to solve it?

Thank you in advance.

Kind regards,

Marco Jacobs

TNO-Building Brains
WP3 - Smart Energy Systems
Pillar Climate & Comfort