[Equest-users] OA hourly data

[Brian Fountain]

At the system level in flow parameters supply air is set to 20,000 cfm 
but return is set to 16,000 cfm. Difference is set as OA.  Clear the 
return air flow field and you will get 0 OA air flow.

On 4/19/2011 2:39 PM, R B wrote:
> Attached are the files. I am looking at RTU1 system.
> Thanks
> -Rohini
>
> On Tue, Apr 19, 2011 at 1:12 PM, R B <slv3sat at gmail.com 
> <mailto:slv3sat at gmail.com>> wrote:
>
>     Its a VAV system.
>
>
>     On Tue, Apr 19, 2011 at 12:42 PM, Brian Fountain
>     <bfountain at greensim.com <mailto:bfountain at greensim.com>> wrote:
>
>         When I set OA cfm to 0 and system min OA to 0, I do get 0 for
>         variable 39 & 0 for OA in the SV-A report.  What system type?
>
>         Perhaps best if you send .pd2 and .inp to list to have a look.
>
>
>         On 4/19/2011 12:40 PM, R B wrote:
>>         Kamel, Bill,
>>         Thanks for the reply. I changed the OA cfm for all the zones
>>         to 0. Now in the SV-A report the zone OA is showing as zero
>>         but the system OA ratio is 0.2 and the custom hourly report
>>         variables (ratio of outside air to supply flow - Var 39, and
>>         the minimum OA damper position - Var 80) are still varying
>>         from 0.21 to 0.56. Not sure from where eQuest is getting
>>         0.2 value or these other values in the hourly report.
>>         Does VAV have a default minimum outside air that cannot be
>>         overwritten?
>>         Thanks
>>         -Rohini
>>
>>         On Tue, Apr 19, 2011 at 10:16 AM, Haddad, Kamel
>>         <Kamel.Haddad at nrcan-rncan.gc.ca
>>         <mailto:Kamel.Haddad at nrcan-rncan.gc.ca>> wrote:
>>
>>             Rohini, Try setting all the zone level outside air fields
>>             to the smallest number you can enter.
>>             Kamel Haddad
>>             ------------------------------------------------------------------------
>>             *From:* equest-users-bounces at lists.onebuilding.org
>>             <mailto:equest-users-bounces at lists.onebuilding.org>
>>             [mailto:equest-users-bounces at lists.onebuilding.org
>>             <mailto:equest-users-bounces at lists.onebuilding.org>] *On
>>             Behalf Of *R B
>>             *Sent:* April 19, 2011 10:21
>>
>>             *To:* eQUEST Users List
>>             *Subject:* [Equest-users] OA hourly data
>>
>>
>>             Hello all:
>>             I am trying to simulate zero outside air. I set the min
>>             OA on the systems tab to zero, economizer to fixed
>>             fraction, there are no OA numbers at the zone level. I
>>             would assume this will give me zero OA but when I look at
>>             the hourly variables (ratio of outside air to supply flow
>>             - Var 39, and the minimum OA damper position - Var 80)
>>             they vary from 0.21 to 0.56.
>>             What am I missing? Any pointers helpful.
>>             -Rohini
>>
>>
>>
>>
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>>
>
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