[Equest-users] new equest

Steven Gates stvgates at pacbell.net
Thu May 21 09:37:30 PDT 2009


Charles,

 

Clayton has identified the bug I'm talking about, and his expression,
specified for ZONE:HMIN-FLOW-RATIO is the fix we have implemented in the
pending release.  

 

Steve Gates

 

  _____  

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of
Clayton.E.Dumcum at jci.com
Sent: Thursday, May 21, 2009 9:26 AM
To: Charles Land
Cc: equest-users at lists.onebuilding.org;
equest-users-bounces at lists.onebuilding.org
Subject: Re: [Equest-users] new equest

 


Jason, 

There is a bug in V3.63 that defaults zone heating minimum flow ratio to
1.00 (technically, I think it defaults to the system minimum overall supply
ratio), rather than the system heating minimum flow ratio (which defaults to
0.01).  This will cause systems with variable heating air flow to use a lot
more fan and heating energy than expected. 

You can either change all of your zone flows manually or set a user-defined
default code snippet: for the zone heating minimum air flow (or insert this
bit of code in your .inp file). 

if (#P("HMIN-CFM-RATIO") == unused) 
    then unused 
    else if (#RV(#P("HMIN-CFM-RATIO")) == 0) 
          then #P("HMIN-CFM-RATIO") 
          else no_default 
         endif 
   endif 


Hope this helps, 
Clayton 

  




Charles Land <cland at geo-marine.com> 
Sent by: equest-users-bounces at lists.onebuilding.org 

05/21/2009 11:08 AM 


To

"equest-users at lists.onebuilding.org" <equest-users at lists.onebuilding.org> 


cc

 


Subject

[Equest-users] new equest

 


 

 




Has anyone ran any of their old files in the new equest yet.  My numbers
have significantly changed.  I am working on ECMs and my constant volume
alternative is saving more money than my vav alternative.  Is anyone else
having any problems with this.  Should I not be running 3.61 file on 3.63? 
  
Charles (Jason) Land 
Project Engineer 
Geo-Marine, Inc | Energy Services Group 
146 Market Place Boulevard | Knoxville, TN  37922 
Office: (865) 692-0084 | Fax: (865) 692-0560 
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