[BLDG-SIM] EQuest question: glass conductance

[Ery Djunaedy]

Vikram and Marlin: Thanks for your reply

All:

> We need to add an expression to the GLASS-CONDUCTANCE input (also the
> VIS-TRANS and OUTSIDE-EMISS) that mark these as unused for glass types
> fetched from the glass library. 

Even better, you can block out these cells if the glass type
refers to the library. The reason for my question is because the
Shading Coefficient cell is blocked out if we select the library,
while these other cells (including the glass conductance) is not
blocked. The logical conclusion is that EQuest will look at the
library if it needs SC, but still need the values of the
GLASS-CONDUCTANCE, VIS-TRANS and OUTSIDE-EMISS. I would suggest
to block these cells if the library is selected.

On importing from Windows5:

The reason I ask this question is when I imported glass
properties from Windows5, I found that the windows conduction
jumps compared to my baseline scenario.

The glass conductance value was the immediate suspect, but it
turned out that this is not the problem.

The problem for my case was that every time I imported the
window, the gap between the panes was set to zero. The import
filter can pick up the gas fill between the pane, but it failed
to import the gap distance. No warning was issued so I initially
accepted that the import is fine. Only after digging into the
imported properties one by one, then I found that the gaps are
set to zero.

Solution/Work around: Save the EQuest file after import. close
EQuest and open the input file (.inp) in the text editor. Find
the imported glazing in the glass section, type in 12mm (or
whatever the gap is), and that's it.

The next time you import from Window5, and wonder why the window
conduction jump, check the gap between the panes.

I suspect this is a bug in the EQuest filter from Window5. I have
only tested it with a few different windows configuration, and
the behaviour seems consistent.

Regards,

Ery




======================================================
You received this e-mail because you are subscribed 
to the BLDG-SIM at GARD.COM mailing list.  To unsubscribe 
from this mailing list send a blank message to 
BLDG-SIM-UNSUBSCRIBE at GARD.COM