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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>My two cents…..<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If it takes 6 hours, you’ve probably got too much detail in the model, e.g. too many zones, too many surfaces, shading elements that do little, too many individual windows when they could be combined, etc.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>There are exceptions, of course, , but I think there are few models which NEED a very high level of detail.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>You might ask one of the IES support folk their opinion of your model and for recommendations to make it run faster.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal align=center style='text-align:center'><b><span style='font-size:13.5pt;font-family:"Calibri","sans-serif";color:#1F497D'>The Building Performance Team<br></span></b><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>James V. Dirkes II, P.E., BEMP , LEED AP<br></span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>1631 Acacia Drive NW<br>Grand Rapids, MI 49504<br>616 450 8653<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Paul Carey<br><b>Sent:</b> Thursday, July 14, 2011 6:12 PM<br><b>To:</b> Donal O'Connor; bldg-sim@lists.onebuilding.org<br><b>Subject:</b> Re: [Bldg-sim] Energy Model Costs<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Donal<br><br>Set it up during the day and leave it running over night and have a minimum of 2 machines, so when its tied up running simulations you can still get on with other stuff.<br><br>Depending on number of zones that sounds pretty reasonable to me. I've had energyplus models I got bored with letting them run after 4 days. Ok its quicker now, but the Apache bit of IES is always a bit quicker than most. The issue comes when you start to take account of the Outcast and Radiance calculations for daylight linking control, all of which energyplus does at the same time as running simulations.<br><br>You should obviously take the time into account if you are setting up model, etc but I'd be very surprised if you can get away with charging for computational time. CFD people can get away with that as they are tying up processors for long periods often right across a network and it often does take longer.<br><br>Just my own opinion of course, but I'd be surprised if anyone on this list gets away with that. If you do, please don't tell me, just well done to you...;-)<br><br>Regards<br>Paul<br><br><br>Dr Paul Carey<br>Director<br><br>Zero Energy Design Ltd<br>10a Portland Place<br>2-22 Mottram Road<br>Stalybridge<br>Cheshire<br>UK<br>SK15 3AD<br><br>Tel - +44 161 3386200<br>Mob - +44 789 4098012<br>Email - <a href="mailto:paul@zed-uk.com">paul@zed-uk.com</a><br><br><br><br>----- Reply message -----<br>From: "Donal O'Connor" <<a href="mailto:oconnor_dj@hotmail.com">oconnor_dj@hotmail.com</a>><br>Date: Thu, Jul 14, 2011 22:13<br>Subject: [Bldg-sim] Energy Model Costs<br>To: <<a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a>><br><br><br><br><br><br>Hey,<br><br>I know there was a discussion on this a few months back but one <br>area which the discussion did not cover was regarding the time it takes <br>for energy model simulations. I am currently working on my first LEED <br>project which is a complex university lab building. I am using IES VE to<br>model the building. After a long process I am finally nearing project <br>completion. However, I found myself spending a huge amount of time <br>waiting during simulations. Using a computer with the spec recommended <br>by IES VE for large projects, the full PRM simulation took approximately<br>30 hours (6 hours for each - proposed, baseline 0, baseline 90, <br>baseline 180 and baseline 270). As my bosses are looking to me for ideas<br>regarding cost for future projects, does one account for simulation <br>time in the price or how is this done?<br><br>Any help is greatly appreciated!<br><br>Kind Regards,<br><br>Donal <o:p></o:p></p></div></body></html>