[Trace-users] Ventilation VAV

[Oscar Buchely]

Thanks for your help. I change the system option in the baseline to Sum Room OA Reqs. I got the same cfm in the baseline and proposed.




On 07/05/2015 04:20 p.m., Keith Swartz wrote:
>
> Oscar,
>
> You can override the baseline ventilation to match the proposed. In 
> the “Options” tab of “Create Systems” click on the “Advanced Options” 
> in the upper right.
>
> The “System-Level Ventilation Overrides” section is in the lower 
> right. Unfortunately the entry is not cfm but % of peak design fan 
> airflow.
>
> Keith Swartz, PE
>
> Senior Energy Engineer | *Seventhwave *| *Madison.Chicago.Minneapolis*
>
> (formerly Energy Center of Wisconsin)
>
> 608.210.7123 | www.seventhwave.org <http://www.seventhwave.org/>
>
> *From:*Trace-users [mailto:trace-users-bounces at lists.onebuilding.org] 
> *On Behalf Of *Bob Fassbender
> *Sent:* Thursday, May 07, 2015 4:13 PM
> *To:* Oscar Buchely
> *Cc:* trace-users at lists.onebuilding.org
> *Subject:* Re: [Trace-users] Ventilation VAV
>
> Hi Oscar,
>
> If you followed the manual for BOTH the proposed and baseline and 
> implemented the same std 62.1 parameters in both, ironically, that's 
> what should happen i. The critical ventilation changes as a result of 
> the alterations in the baseline's envelope and internal loads. This of 
> course impacts the total system ventilation.
>
> Most likely,  you want to 1) ensure that your proposed ventilation 
> matches the design ventilation (which should match with std 62)
>
> 2) set room by room ventilation in the baseline to match exactly with 
> the room ventilations of the proposed. I am pretty sure TRACE does 
> this when you select "New ASHRAE 90.1 baseline"
>
> Of course, I'm just guessing on your baseline setup,
>
> Cheers,
>
> Bob
> Energy-models.com
>
> ᐧ
>
> On Thu, May 7, 2015 at 2:52 PM, Oscar Buchely 
> <obuchely at ses-ingenieria.com <mailto:obuchely at ses-ingenieria.com>> wrote:
>
>     Hi.
>
>     I am modelling a VAV systems in base line and proposed models for
>     LEED certification purpose. Even though I followed the Trace 700
>     user manual steps for introducing 62.1 air flows I don't get the
>     same Nom Vent  in the system check sums report for the baseline
>     and proposed system?.
>
>     Thanks
>
>     -- 
>
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