[Equest-users] Large model crashes on changing system

[Umesh Atre]

RK,
Here is another string related to file size etc. from some time back. It
may or may not not apply to your current problems.
Best of luck.
 
 

________________________________

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Nick
Caton
Sent: Wednesday, May 16, 2012 6:03 PM
To: rubu98 at gmail.com; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Large model crashes on changing system



Hi RK,

 

Your questions are most quickly answerable in reverse order:

 

#2: yes, you can create a partial model and import into another.  I have
attached a guide to this approach (also findable within the mailing list
archives and elsewhere on the web).  

#1: You could take an approach using what you proposed for #2, but I
would first try to define your middle stories as single-story shells
with no ceiling or floor (adiabatic) and then assigning an appropriate
shell multiplier at the first DD shell wizard screen to get the
quantities right.  That should avoid the whole top/middle/bottom thing.

 

I also suspect sheer size to be the foundation of your troubles, with
geometry-induced errors following close behind.  

 

If you're still stuck I would look hard at whether there's any means to
simplify how your 74k windows are defined and/or the associated
perimeter wall geometries.  To that end I've also attached a previous
discussion where a window/wall geometry error was causing crashes in a
large model - might be instructive/helpful for your current situation. 

 

Hopefully the above suggestions will simplify things back into working
order, but if not it is sometimes productive to save a dummy copy of
your file and you'll find removing a specific shell or system will
return the model to stability, in which case re-creating the offending
item can be faster than trying to ferret out the actual cause.  If you
take this approach try to work backwards from the point you first
noticed issues.

 

~Nick

 

 

 

NICK CATON, P.E.

SENIOR ENGINEER

 

Smith & Boucher Engineers

25501 west valley parkway, suite 200

olathe, ks 66061

direct 913.344.0036

fax 913.345.0617

www.smithboucher.com 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of
rubu98 at gmail.com
Sent: Wednesday, May 16, 2012 3:09 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Large model crashes on changing system

 

Hello everyone,

This is my first post to this forum - have been using eQuest for a few
months now, having used VisualDOE for a few years. I am modeling a large
building (about 50 stories, with 21 different shells), and currently I
have one system per floor (34 systems total). However, when I try to
change the system type for even one system, eQuest crashes. Also, every
time I go into DD Wizard to simplify my model and exit the wizard, I
would get an "Unhandled Exception" error and eQuest would crash again.
Besides, I have about 74,000 windows in the model too.  

It'd be great if someone could point out what is wrong with the limited
information I can explain above, but to resolve my issue, I am
considering alternative solutions and would appreciate if you guys can
comment on them: 

1.	Is there a way to avoid creating Top, Middle and Bottom floors
for multiplied floors and have only one floor? Cutting down on two extra
floors for every shell with mutipliers might help. 
2.	Is there a way to split up the model into two, enter all inputs
seperately and then import one model into another to complete the model
and run the simulations? I know this sounds complicated, but would
appreciate some pointers from people who have successfully tried this
before.

Thanks, 

RK.

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