[Equest-users] CHW temp and cooling coil leaving temp

[Lam, Linda]

Josh,
 
I think the program picks up fan heat.  So depending on how you have defined your fans, that will change the miminium temp equest accepts without errors.
 
Linda
 
 
 
 
Linda Lam, LEED® AP
WSP Flack + Kurtz
405 Howard Street, Suite 500
San Francisco, CA 94105
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From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Josh Doherty
Sent: Wednesday, April 22, 2009 10:16 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] CHW temp and cooling coil leaving temp



HI,

I am trying to model a VAV system for cooling and heating.  On the cooling side, I specify a 52F CHW loop temperature and a "Zone Entering Min Supply Temp" of 55F.  When I run the simulation I get an error that states "cooling coil leaving temperature must be at least 6F higher than entering water temp".  I played with adjusting the "Zone Entering Min Supply Temp" to see what minimum value would work without errors and the lucky number was 61F.  I am trying to figure out why this is the minimum temperature eQuest accepts without errors.  The 61F is 9F higher than the entering water temperature and not 6F like the error states.  Any ideas what is going on?  Thanks so much for your help and insight.

 

Josh Doherty

 

 

 

 

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