[Equest-users] new equest

Doug Maddox DougM at TWGI.com
Thu May 21 11:16:09 PDT 2009


Where in the input file should this be placed?

 

Does it only apply to VAV systems with THERMOSTAT-TYPE not
REVERSE-ACTION?

 

Thanks,

Doug Maddox

The Weidt Group

 

________________________________

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Steven
Gates
Sent: Thursday, May 21, 2009 12:38 PM
To: Clayton.E.Dumcum at jci.com; 'Charles Land'
Cc: equest-users at lists.onebuilding.org;
equest-users-bounces at lists.onebuilding.org
Subject: Re: [Equest-users] new equest

 

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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