Personally, when I’ve ran the same simulations twice, I got the
same answers. I would guess that perhaps you changed something in your IDF file
after your system has crashed to make it work, otherwise, I would be inclined
to agree with you that perhaps your suffering from PC problems (maybe reinstall
windows or check your hardware for defects).
Michael Grant, MIT
Engineering | Systemair Inc.
(T) 1-506-743-9500
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of jipp06
Sent: May-06-11 1:10 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: Model too big and too complicated?
Part 1 - PC Performances
I totally agree. This is what I do, always.. :)
but I guess that question is "can the same model (same garbage in) give
different results(garbage out)? Especially if that IDF has crashed in the past.
Maybe the various "convergence" can converge differently in some
instances.
Otherwise my occasionnal crashes (for the same IDF) would be a matter of PC
resources.
:-)
JP Beaulieu.
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx,
"James V Dirkes II, PE" <jim@...> wrote:
>
> Amen! Test your results .. Always.
>
>
>
> The Building Performance Team
> James V. Dirkes II, P.E., LEED AP, BEMP
> 1631 Acacia Drive NW
> Grand Rapids, MI 49504
> 616 450 8653
>
>
>
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
On Behalf Of Michael Grant
> Sent: Friday, May 06, 2011 10:57 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: RE: [EnergyPlus_Support] Model too big and too complicated? Part
1
> - PC Performances
>
>
>
>
>
> I'm not very experienced with E+, but I can answer one of your question
>
>
>
> "#2 - Can I trust the results of that successfull run (if it has
crashed in
> the past). I suspect that if a run goes through without crashing, it
> probably means the results are good, right?"
>
>
>
> The time tested thing about any calculation is: Garbage In = Garbage Out;
so
> just because your run worked, doesn't mean that it's representative of
your
> problem if your parameters are off.
>
>
>
> Best of luck,
>
>
>
> Michael Grant, MIT
>
> Engineering | Systemair Inc.
>
> (T) 1-506-743-9500
>
> michael.grant@...
>
> http://www.systemair.net <http://www.systemair.net/>
>
>
>
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
On Behalf Of jipp06
> Sent: May-06-11 11:48 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Model too big and too complicated? Part 1 -
PC
> Performances
>
>
>
>
>
> Hello,
>
> In the beginning, it's easy to add details that will make your model more
> complex later in the modeling process. I think I realised that. And it's
> kind of different for every software.
>
> I put too many zones in my building... it's easy to do so in Openstudio.
> Don't you think?
>
> Down the road, I think I am hitting the maximum performances of my PC.
>
> 1st set of questions:
> #1 - If a model only occasionnaly CRASH, is it a good indication that the
PC
> is not powerfull enough? last night a model crashed, I rebooted the PC to
> free RAM and it went through this time.
> MAYBE that the output file are too big: 1Gb .SQL file / 1,6Gb .ESO file...
> my PC has 2Gb RAM. I have a feeling PC may crash if I don't have at least
> that space in RAM, no?
>
> #2 - Can I trust the results of that successfull run (if it has crashed in
> the past). I suspect that if a run goes through without crashing, it
> probably means the results are good, right?
>
> AND WHAT ABOUT YOU?
> #3 - What kind of PCs are you running. I consider upgrading. I have an
Intel
> Core2 Duo CPU 2,2 GHz with 2Go RAM running on WIN Vista Ultimate.
>
> #4 - Should I go for more CPUs or more RAM or Both... I understand from
the
> old msgs on this forum that E+ is single core but there are plans to make
it
> multi-core, right? I should upgrade to 4CPU's then. I think I'll go for a
> Intel Core i7-2600 Processor (3.40GHz, 1066MHz, 8MB) with 4Gb RAM
>
> I have a second set of questions regarding my "complexe" model
but I think
> I'll post them seperately in another msg. coming next!
>
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
__,_._,___