[Equest-users] Spam: Night-Cycle-Ctrl Outside Air??

[Jay Keazer]

Josh,


You need to create a "Minimum Air Schedule" for the outside air damper.  The
schedule type needs to be "Frac/Design" and it should have values of "0" when
you want the outside air damper closed, and "-999" when you want to return to
normal operation and use the calculated OSA value.  You assign it under the
"Outside Air and Economizer" tab you have shown below.  You can check this by
setting up an hourly report for the HVAC system and trending the OSA
fraction.

 

Jay Keazer, EI

Energy Engineer

TME, Inc.

2039 N Green Acres Road

Fayetteville, AR  72703

 

ph   479.521.8634

fax  479.521.1014

jkeazer at tmecorp.com <mailto:email at tmecorp.com> 

 

 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Josh
Greenfield
Sent: Thursday, December 18, 2008 5:51 PM
To: equest-users at lists.onebuilding.org
Subject: Spam:[Equest-users] Night-Cycle-Ctrl Outside Air??

 

I have a proposed 100,000 square foot school in Chicago that I'm modeling
with eQuest, when I have no 'Night Cycle Fan Control' on the main VAV
air-handling systems (NIGHT-CYCLE-CTRL = Stay Off), my annual energy expense
for the building is around $62,000.  When I turn 'Night Cycle Fan Control' on
(NIGHT-CYCLE-CTRL = Cycle on Any), the annual value goes up to $96,000
(mostly natural gas consumption, with some electric consumption due to fan
power).  I'm convinced that during the Night Cycle Fan Control that the VAV
systems are bringing in Outside Air, which is making the energy go way up.
Which report will show me if I am guessing right about the outside air?  And,
how can I change the 'Night Cycle Fan Control' outside air availability to
NOT include at night??  So that at night, the OA dampers are shut and it's
just doing a re-circ/reheat scenario...

 

Thanks!

 

 

 

 

 

Josh Greenfield, PE, LEED AP
Senior Associate
Primera Engineers, Ltd.
100 S. Wacker Drive, Suite 700
Chicago, IL 60606
312.606.0910 Main
312.242.6392 Direct
312.606.0415 Fax
jgreenfield at primerachicago.com
<blocked::mailto:jgreenfield at primerachicago.com> 
http://www.primerachicago.com <http://www.primerachicago.com> 

Be Green...please consider the environment before printing this email.

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