<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
<title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
With respect to your first point, you can have either a single loop
pump, a chiller pump or both. (this can be set up in the wizard or
detailed interface -- obviously you are well into the detailed
interface on this project.)<br>
<br>
For each chiller in eQUEST, one of the tabs is "loop attachments"
where you can specify a chiller chilled water pump and a chiller
condenser water pump which will then operate with the chiller. Once
you have defined the pumps there, you can delete the main loop pump.<br>
<br>
Note that I have found it helpful to save and then reopen and eQUEST
file once water side changes have been made -- especially when you
are reconfiguring loops and pumps. Sometimes saving and reopening
clears .bdl errors that would otherwise crop up.<br>
<br>
<br>
With regard to your 2nd query, I have not had time to open your
file. You can change the loop "sizing option" from secondary (where
it adds up all connected coil capacities) to primary (where it looks
at capacity of primary equipment on the loop). Perhaps this may
resolve the issue. Apologies if I missed the point on this one.<br>
<br>
<br>
<br>
<br>
<br>
On 1/24/2011 12:27 PM, Heinrich.ib-bauklima.de wrote:
<blockquote
cite="mid:0Lb8B7-1Q5BNe1JxR-00lAqf@mrelayeu.kundenserver.de"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1">
<meta content="MSHTML 6.00.6000.17063" name="GENERATOR">
<div><span class="890062716-21012011">
<p class="MsoNormal"><font face="Arial"><span
class="890062716-21012011">Hi </span>Everyone,<o:p></o:p></font></p>
<p class="MsoNormal"><o:p><font face="Arial"><span
class="890062716-21012011"></span></font></o:p> </p>
<p class="MsoNormal"><o:p><font face="Arial"><span
class="890062716-21012011">I got a review comment that
got me in big trouble and I can't find the solution
yet.</span></font></o:p></p>
<p class="MsoNormal"><o:p><font face="Arial"><span
class="890062716-21012011">May be there is no solution
for this in eQUEST....!</span></font></o:p></p>
<p class="MsoNormal"><o:p><font face="Arial"><span
class="890062716-21012011">I rate this forum as the
very best address for difficulties with eQUEST and
LEED EAc1 simulation.</span></font></o:p></p>
<p class="MsoNormal"><o:p><font face="Arial"><span
class="890062716-21012011">So please give me some
guidance and feel free to test the model attached.</span></font></o:p></p>
<p class="MsoNormal"><o:p><font face="Arial"><span
class="890062716-21012011"></span></font></o:p> </p>
<p class="MsoNormal"><o:p><font face="Arial"><span
class="890062716-21012011">Here are the two comments
of the reviewer.</span></font></o:p></p>
<p class="MsoNormal"><o:p><span class="890062716-21012011"><span
lang="DE"><font face="Arial"><em>"It appears as if the
pumps and circulation loops were not modeled
correctly for the Baseline Case. It appears based
on the PS-C reports that there is only one primary
chilled water pump and one condenser water pump
for the Baseline Case. However, ASHRAE 90.1
Section G3.1.11 requires that each chiller be
modeled with separate condenser water and chilled
water pumps interlocked to operate with each
associated chiller. Please model two primary
chilled water pumps and two primary condenser
water pumps in accordance with Section G3.1.11.
Also update the chilled water valves to two-way
valves so that the secondary chilled water loop
operates as a variable flow loop with pumps riding
the curve. Provide updated PS-C reports confirming
that the changes have been made."</em></font></span></span></o:p></p>
<p><font face="Arial"><em><span class="890062716-21012011">"</span>It
is unclear why the pump flow for the secondary chilled
water loop is so much larger than that of the primary
chilled water loop when the temperature differential for
both loops is expected to be the same. It also appears
based on the outputs in PS-C that the secondary chilled
water loop is operated at the same load for every hour
that it is on even though it is a variable speed pump.
Please update the secondary chilled water loop flow to
be consistent with the primary chilled water loop flow,
and confirm that the secondary chilled water loop is
operating as a variable flow loop.<span
class="890062716-21012011">"</span></em></font></p>
</span>
<p class="MsoNormal"><o:p><font face="Arial"><span
class="890062716-21012011"></span></font></o:p> </p>
<p class="MsoNormal"><o:p><font face="Arial"><span
class="890062716-21012011">I have to say:</span></font></o:p></p>
<p class="MsoNormal"><o:p><font face="Arial"><span
class="890062716-21012011">I didn't see any equest-model
modeled with separate condenser water and chilled water
pumps interlocked to operate with each associated
chiller. </span></font></o:p></p>
<p class="MsoNormal"><o:p><font face="Arial"><span
class="890062716-21012011">I manually resized the
boilers and chillers with reference to SS-D report,
because auto sizing of eQUEST generated capacities that
were double the size of SS-D report. </span></font></o:p><o:p><font
face="Arial"><span class="890062716-21012011">Resizing of
the volume flow of secondary loop of chillers according
to primary loop of chillers generated warning messages
but changed nothing.</span></font></o:p></p>
<p class="MsoNormal"><span class="890062716-21012011"><span
class="890062716-21012011"><font face="Arial"><span
class="890062716-21012011"></span></font></span></span> </p>
<p class="MsoNormal"><span class="890062716-21012011"><span
class="890062716-21012011"><font face="Arial"><span
class="890062716-21012011">Heinrich</span></font></span></span></p>
</div>
<div>
<div> </div>
</div>
<pre wrap="">
<fieldset class="mimeAttachmentHeader"></fieldset>
_______________________________________________
Equest-users mailing list
<a class="moz-txt-link-freetext" href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a>
To unsubscribe from this mailing list send a blank message to <a class="moz-txt-link-abbreviated" href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a>
</pre>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<p class="avgcert" color="#000000" align="left">No virus found in
this message.<br>
Checked by AVG - <a moz-do-not-send="true"
href="http://www.avg.com">www.avg.com</a><br>
Version: 10.0.1202 / Virus Database: 1435/3400 - Release Date:
01/24/11</p>
</blockquote>
<br>
</body>
</html>