I would bet that there are many many zones that could be merged, and that there is much other simplification that could be done and your model would still be reasonably accurate (possibly more accurate) and would be more useful for parametric study.
If I were you I would first rezone to minimize surfaces, then check the simpler model against the more complex in terms ot EUI.
Kind regards
Jeremiah D. Crossett | Senior Analyst | Phase Change Energy Solutions
120 E. Pritchard St. | Asheboro, NC 27203 | Mobile 503-688-8951
www.phasechange.com On Thu, Jul 25, 2013 at 1:10 PM, Touraj Ashrafian <
t.ashrafian@xxxxxxxxx> wrote:
>
>
>
> Thanks for your reply. I am going to apply your recommendations however I am interested whether is this long simulation time normal for such a building or something going wrong with my model. As I said before my model is a huge shopping center with lots of void in the central corridor and about 300 zones; I am doing the simulation for whole of a year. My laptop has core i7 CPU and 8GB RAM. Me and my colleagues previous less or more similar works take shorter time to simulate although my last work that was an office building and I modeled in the DesignBuilder and export it to the EnergyPlus take a long time as well!!!
> About jE+, maybe I had a problem with my EnergyPlus v8 when I was using the jE+! I am going to check it again.
>
> --
> Touraj Ashrafian
> PhD Student - Istanbul Technical University
> Phone:+90(536)479-8007
> Email:
t.ashrafian@xxxxxxxxx,
ashrafian@xxxxxxxxxx> Web:
http://alpha-arch.blogspot.com ,
http://alpha-arch2.blogspot.com
>
>
>
> On 7/25/2013 6:57 PM, Jeremiah Crossett wrote:
>
>
> Agreed about the use of sample days such for optimization. Also you might create surrogate models using zones with ideal loads systems then use the information from them on your larger model. My models use FD@60 timesteps, so I have had to find tricks to run parametric and optimization studies. For my projects the zone surrogate model has been the most useful.
>
> Abut your statement "JESS-Plus works with EnergyPlus v.7 and is not working with v.8 I"
>
> jE+ and the JESS server work fine with Energy Plus v8.1, (I know because I use it.)
>
>
>
> Jeremiah D. Crossett | Senior Analyst | Phase Change Energy Solutions
> 120 E. Pritchard St. | Asheboro, NC 27203 | Mobile 503-688-8951
>
www.phasechange.com
>
>
>
>
>
>
> On Thu, Jul 25, 2013 at 5:51 AM, Richard Raustad <
RRaustad@xxxxxxxxxxxx> wrote:
>>
>>
>>
>> Are you running an annual simulation? If so, you could optimize using a
>> few days from the weather file.
>>
>>
>>
>> On 7/25/2013 2:34 AM, Touraj Ashrafian wrote:
>> > Hi All,
>> >
>> > I am simulating a huge shopping center with lots of voids, zones and
>> > sub-surfaces. Unfortunately, the time of simulation is too long in core
>> > i7 computer, about 12 hours, and it is really boring and any
>> > optimization make me really tired. Before completing the constructions
>> > and adding some sub-surfaces, the simulation time was about 5 hours. As
>> > the JESS-Plus works with EnergyPlus v.7 and is not working with v.8 I
>> > can not use it! I wanna know that how can I reduce the time or simulate
>> > the model in more than one computer and combine the results?
>> >
>> > Best Regards,
>> > Touraj
>> >
>>
>> --
>> Richard A. Raustad
>> Senior Research Engineer
>> Florida Solar Energy Center
>> University of Central Florida
>> 1679 Clearlake Road
>> Cocoa, FL 32922-5703
>> Phone: (321) 638-1454
>> Fax: (321) 638-1439 or 1010
>> Visit our web site at:
http://www.fsec.ucf.edu>>
>> UCF - From Promise to Prominence: Celebrating 50 Years
>>
>
>
>