[Equest-users] eQuest- exponential cooling load

[Smith, Michael]

Kathryn,

 

If you haven’t done this yet, try defining both the overheating space and the atrium as sunspaces.  (Internal Loads > Basic Specs  > Sunspace) This will naturally ventilate the spaces with outside air when necessary to avoid overheating. I’m guessing the perimeter atrium is likely all glass, so you can also check your hourly reports for Building Heating and Cooling load from Solar Radiation through Windows to see if that is the culprit. Either that or check for an accidently misplaced decimal in your internal equipment loads… 20 W/sf rather than 2.0 W/sf or something like that. Hope this helps.  

 

Cheers,

 

 

Michael J. Smith, EIT, LEED® AP

WSP ▪ FLACK + KURTZ

512 7th Ave., New York, NY 10018

Direct: 212.951.2671| Main: 212.532.9600

www.wspfk.com <http://www.wspfk.com/> 

 

 

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Kathryn Lee
Sent: Sunday, December 19, 2010 10:43 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] eQuest- exponential cooling load

 

Hi,

I am struggling to find the source of an error with an eQuest model.   In the latter part of the year the building sensible cooling load grows exponentially.

This error seems to be associated with one of the perimeter zones, and specifically one that is adjacent to an atrium.  For this zone the peak equipment load occurs at midnight on December 31st, and is 1000x the setting for the  space.  Has anyone seen a similar issue?  

 

Any suggestions would be most welcome!  We’re under a bit of a time crunch.  

 

Thanks!

 

 

 

Kathryn Lee

Mechanical Engineer | Sydney Buildings ESD

 

Arup

Level 10 201 Kent Street Sydney NSW 2000

t +61 2 9320 9320  d +61 2 9320 9922  

f +61 2 9320 9321

www.arup.com <http://www.arup.com/> 

 

 

 

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