[Equest-users] new equest

[Steven Gates]

Your input had some relatively unique issues that we have resolved and will
be posting a new release shortly.  Here is the summation of issues:

 

1.	As identified below, the ZONE:HMIN-FLOW-RATIO was defaulting to the
SYSTEM level MIN-FLOW-RATIO rather than HMIN-FLOW-RATIO. In your input, you
specified SYSTEM:MIN-FLOW-RATIO = 0.8, but at each zone you specified
ZONE:MIN-FLOW-RATIO = 0.46.  The zone HMIN-FLOW-RATIO was then defaulting to
0.8 rather than "no default", which would have then been set at the start of
the simulation to 0.46. 

Interim solution: Don't specify the MIN-FLOW-RATIO at both the SYSTEM and
ZONE level; either is fine, both are not.


2.	When the SYSTEM:SUPPLY-FLOW is specifed, and one or more
ZONE:ASSIGNED-FLOWs are also specified, the outside air requirement for that
zone was dropped from the summation of zone outside air requirements.  This
causes the "OUTSIDE AIR RATIO" reported on SV-A to be less than it should
be, resulting in less heating energy.

Interim solution: Don't specify SUPPLY-FLOW and ASSIGNED-FLOW concurrently.
Or, don't specify any zonal outside air requirements, and instead specify
the SYSTEM:MIN-OUTSIDE-AIR

 

Steve Gates

 

  _____  

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Charles
Land
Sent: Wednesday, June 03, 2009 8:20 AM
To: Clayton.E.Dumcum at jci.com
Cc: equest-users at lists.onebuilding.org;
equest-users-bounces at lists.onebuilding.org
Subject: Re: [Equest-users] new equest

 

I sent this e-mail a few weeks ago in hopes to validate the accuracy of the
new equest 3.63.  I have heard back about bugfixes you can place in your bdl
code as well as a pending release.  The only problem is the bug fix is for
when your heating and fan energy is increasing.  My gas usage is dropping
when running my old file in the new equest.  Has anyone heard anything else
about any of the problems (bugs) with 3.63.  I am honestly worried about
switching over.  Has anyone else still been running into these problems?  

 

From: Clayton.E.Dumcum at jci.com [mailto:Clayton.E.Dumcum at jci.com] 
Sent: Thursday, May 21, 2009 12:26 PM
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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