[Equest-users] Inquiry Regarding Entry of Ventilation Outdoor Air for PSZ System in eQuest

[Bishop, Bill]

Mark,

For a LEED Baseline, you should have no reason to select "Outside Air From System". Presumably, you have already completed your Proposed model, and it is running well with the desired OA amounts specified for each zone. Just copy the OA amounts from your Proposed model zones into the corresponding zones of your Baseline. Check your SV-A reports in the SIM file to verify that the OA is correct at the zone and system levels. There are no standard reports that show ventilation loads AFAIK. You can create custom hourly reports to track system supply CFM and %OA.

Regards,
Bill

William Bishop, PE, BEMP, LEED AP | Pathfinder Engineers & Architects LLP
Senior Energy Engineer

134 South Fitzhugh Street                 Rochester, NY 14608
T: (585) 325-6004 Ext. 114            F: (585) 325-6005
bbishop at pathfinder-ea.com<mailto:wbishop at pathfinder-ea.com>           www.pathfinder-ea.com<http://www.pathfinder-ea.com/>
P   Sustainability - the forest AND the trees. P

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Mark Rasmussen
Sent: Friday, May 17, 2013 2:22 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Inquiry Regarding Entry of Ventilation Outdoor Air for PSZ System in eQuest

To Whom May Be So Kind,

We are currently creating a Baseline Case Energy Model using eQuest for
LEED NC v2.2 for a facility that will consist of restaurants and a bar/lounge.
According to LEED NC v2.2, we need to use a Packaged Single Zone (PSZ-AC)
system for the baseline case energy model.

We have done so, but I can not find a way to program the Ventilation Outside Air
(cfm) for the Roof-top units (RTUs). In the Detailed Mode, I can go into Outdoor Air
tab in the spreadsheet section of the Air-Side HVAC System Parameters, but the
"Outside Air From System" box is grayed out and listed as "undefined". There are
more options in what I can insert there, and we have tried them all, but none of them
change the end use results of the energy model.

Currently, the energy model results for Space Heating only show usage resulting
from Conduction Losses and not from Ventilation using Outdoor Air. This is confusing
to us, since the SV-A Report in the DOE-2 Engine reports shows Outdoor Air in the system results.

Any help to guide us on how to program the Outdoor Air (in cfm or as a fraction of Supply
Air) in our energy model would be very appreciated.

Thanks & Best Wishes!
Mark










-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20130517/870ab956/attachment-0002.htm>