[Equest-users] new equest

[Charles Land]

I suppose what I was trying to ask was, would you trust this new version of e-quest??

From: Steven Gates [mailto:stvgates at pacbell.net]
Sent: Wednesday, June 03, 2009 12:52 PM
To: Charles Land; Clayton.E.Dumcum at jci.com
Cc: equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] new equest

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

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

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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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