Energy Model Costs

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Hey,

I know there was a discussion on this a few months back but one
area which the discussion did not cover was regarding the time it takes
for energy model simulations. I am currently working on my first LEED
project which is a complex university lab building. I am using IES VE to
model the building. After a long process I am finally nearing project
completion. However, I found myself spending a huge amount of time
waiting during simulations. Using a computer with the spec recommended
by IES VE for large projects, the full PRM simulation took approximately
30 hours (6 hours for each - proposed, baseline 0, baseline 90,
baseline 180 and baseline 270). As my bosses are looking to me for ideas
regarding cost for future projects, does one account for simulation
time in the price or how is this done?

Any help is greatly appreciated!

Kind Regards,

Donal

Dónal OConnor's picture
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Joined: 2011-10-02
Reputation: 0

Try to run models like that at night before you leave.

Most likely you?ll see some savings in run-time (whichever program you use)
by reducing the number of objects in your next project where you see the
opportunity to combine things in a reasonable manner.

I wouldn?t normally include any significant time allocation for simulation
time as you describe, but if you are going to incur it I guess you better
let your boss know to account for that. Hopefully you can find something
else to work on ahead of time while the calculation proceeds if your next
project has similarly long run times.

*David S. Eldridge, Jr.**, P**.**E**.**, LEED AP BD+C, BEMP, BEAP, HBDP*

*From:* bldg-sim-bounces at lists.onebuilding.org [mailto:
bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *Donal O'Connor
*Sent:* Thursday, July 14, 2011 4:14 PM
*To:* bldg-sim at lists.onebuilding.org
*Subject:* [Bldg-sim] Energy Model Costs

Hey,

I know there was a discussion on this a few months back but one area which
the discussion did not cover was regarding the time it takes for energy
model simulations. I am currently working on my first LEED project which is
a complex university lab building. I am using IES VE to model the building.
After a long process I am finally nearing project completion. However, I
found myself spending a huge amount of time waiting during simulations.
Using a computer with the spec recommended by IES VE for large projects, the
full PRM simulation took approximately 30 hours (6 hours for each -
proposed, baseline 0, baseline 90, baseline 180 and baseline 270). As my
bosses are looking to me for ideas regarding cost for future projects, does
one account for simulation time in the price or how is this done?

Any help is greatly appreciated!

Kind Regards,

Donal

David S Eldridge's picture
Joined: 2011-09-30
Reputation: 2000