[Equest-users] heat recovery and zone exhaust

[Bishop, Bill]

James,
 
Make sure to NOT enter zonal exhaust flows if your intention is for the
air to return to the ERV. Specifying zonal exhaust simulates air leaving
the zone through a separate exhaust fan (think bathrooms, kitchens,
clothes dryers) and not returning to the air handling unit.
 
Regards,
Bill
 
William Bishop, PE, BEMP, LEED(r) AP | Pathfinder Engineers & Architects
LLP
Mechanical Engineer
 
 134 South Fitzhugh Street                 Rochester, NY 14608
T: (585) 325-6004 Ext. 114                F: (585) 325-6005
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 James
Hansen
Sent: Wednesday, December 15, 2010 9:59 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] heat recovery and zone exhaust
 
I'm having the typical issues with getting an enthalpy wheel to show
appreciable savings.  I've adjusted some of the control sequences, and
have managed to show a savings in cooling energy, but I'm getting no
heating savings, which is strange, unless my building is actually asking
for cold OA during the winter because of the rather large internal heat
loads (my guess is that this is true).
 
My question is whether you HAVE to define zonal exhaust airflow rates to
properly show the savings from heat recovery, or if the program knows
that the exhaust will roughly match the OA delivered to the space?  Do I
have to turn on exhaust tracking?
 
GHT Limited
James Hansen, PE, LEED AP
Senior Associate
1010 N. Glebe Rd, Suite 200
Arlington, VA  22201-4749
703-338-5754 (Cell)
703-243-1200 (Office)
703-276-1376 (Fax)
www.ghtltd.com <http://www.ghtltd.com/> 
 
 
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