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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Morteza,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">There is a fundamental difference in the definition of a “secondary” loop between eQUEST and ASHRAE 90.1.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">In ASHRAE and customarily, a primary-secondary loop configuration involves one set of pumps for the chiller (or boiler) and a second set to pump through the building.
<img width="595" height="297" style="width:6.1979in;height:3.0937in" id="Picture_x0020_1" src="cid:image002.png@01D6CD3F.FB514790"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Image from pumpsandsystems.com<o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">This can be primary-secondary can accomplished in eQUEST with a
<i>single</i> circulation loop by adding pumps to the chiller as well as to the chilled water circulation loop.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">In the wizard:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><img width="632" height="454" style="width:6.5833in;height:4.7291in" id="Picture_x0020_2" src="cid:image004.png@01D6CD3F.FB514790"></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Which results in this configuration in the detailed interface. CHW Loop Pump is the secondary loop pump while Chlr1 … Pump is the primary loop pump.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><img width="262" height="140" style="width:2.7291in;height:1.4583in" id="Picture_x0020_3" src="cid:image005.png@01D6CD3F.71592670"></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The primary pumps can also be defined and added to the chiller in the detailed interface under the Loop Attachments tab.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><img width="606" height="449" style="width:6.3125in;height:4.677in" id="Picture_x0020_4" src="cid:image010.png@01D6CD3F.FB514790"></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">If only the circulation loop pumps<b> or
</b>the pumps as a child to the chiller are defined you have a primary system. if both the circulation loop pumps
<b>and</b> the chiller child pumps are defined in eQUEST then you have a primary-secondary loop configuration. So – to meet the primary-secondary configuration required by ASHRAE you need only define chiller pumps and chilled water loop pumps.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">By contrast, you can add subloops within eQUEST. These subloops allow you to separate loads or carry loads at different temperatures. For example, often we
will put snow melting on a separate heating subloop so that load can easily and explicitly be called out. Unfortunately, these subloops are termed ‘secondary’ loops in eQUEST which seems to me to be creating the confusion. The initial message suggests a
chilled water subloop was created with no loads on it. That triggered the message that eQUEST could not size the subloop. My recommendation is to remove the subloop and ensure that chilled water loop pumps and chiller pumps have both been defined.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Brian<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:8.0pt;line-height:106%"><b><span style="line-height:106%;font-family:"Arial",sans-serif;color:#006298">Footprint<br>
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</span></b><b><span style="font-size:10.0pt;line-height:106%;font-family:"Arial",sans-serif;color:#006298">Brian Fountain<br>
</span></b><span style="font-size:9.0pt;line-height:106%;font-family:"Arial",sans-serif;color:#3D3935">Associate<br>
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</span><span style="font-size:11.0pt;line-height:106%;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Equest-users <equest-users-bounces@lists.onebuilding.org>
<b>On Behalf Of </b>Morteza Kasmai via Equest-users<br>
<b>Sent:</b> December 7, 2020 3:33 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Secondary Chilled Water Loop has zero design flow<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">CAUTION: EXTERNAL SENDER <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Tahoma",sans-serif;color:#274E13">Danny,</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#274E13"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Tahoma",sans-serif;color:#274E13"><br>
<br>
</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#274E13"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Tahoma",sans-serif;color:#274E13">Thank you for your suggestion.</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#274E13"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Tahoma",sans-serif;color:#274E13"><br>
<br>
</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#274E13"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Tahoma",sans-serif;color:#274E13">Regarding Appendix G requirements
</span><span style="font-family:"Tahoma",sans-serif;color:#274E13">(G3.1.3.10) I was wondering if I should select
</span><span style="font-size:11.0pt;font-family:"Tahoma",sans-serif;color:#274E13">the Secondary Chilled Water Loop for all the chilled water cooling coils (AHUs).</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#274E13"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Tahoma",sans-serif;color:#274E13"> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#274E13"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Tahoma",sans-serif;color:#274E13">I would
</span><span style="font-family:"Tahoma",sans-serif;color:#274E13">appreciate</span><span style="font-size:11.0pt;font-family:"Tahoma",sans-serif;color:#274E13"> hearing your thoughts on this.
</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#274E13"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif;color:#274E13"> </span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#274E13"><o:p></o:p></span></p>
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<p style="margin-bottom:0cm;margin-bottom:.0001pt"><span style="font-family:"Arial",sans-serif;color:#006600;letter-spacing:.15pt">Morteza Kasmaei<br>
Senior Architect</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#006600">LEED AP BD+C, GGP</span><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#006600"> </span></b><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Sun, Dec 6, 2020 at 12:01 AM <<a href="mailto:equest-users-request@lists.onebuilding.org">equest-users-request@lists.onebuilding.org</a>> wrote:<o:p></o:p></p>
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<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<p class="MsoNormal">Send Equest-users mailing list submissions to<br>
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<br>
To subscribe or unsubscribe via the World Wide Web, visit<br>
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<br>
or, via email, send a message with subject or body 'help' to<br>
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equest-users-request@lists.onebuilding.org</a><br>
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You can reach the person managing the list at<br>
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equest-users-owner@lists.onebuilding.org</a><br>
<br>
When replying, please edit your Subject line so it is more specific<br>
than "Re: Contents of Equest-users digest..."<br>
Today's Topics:<br>
<br>
1. Re: Equest-users Digest, Vol 153, Issue 3 (Danny Xu)<br>
<br>
<br>
<br>
---------- Forwarded message ----------<br>
From: Danny Xu <<a href="mailto:dannyxu576@gmail.com" target="_blank">dannyxu576@gmail.com</a>><br>
To: <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
Cc: <br>
Bcc: <br>
Date: Fri, 4 Dec 2020 17:43:57 -0500<br>
Subject: Re: [Equest-users] Equest-users Digest, Vol 153, Issue 3<br>
Hi Morteza,<br>
<br>
There is no system under "Secondary Chilled Water Loop" in your energy model.<br>
<br>
Selecting the "Secondary Chilled Water Loop" for a chiller water<br>
cooling system will fix the problem. Or you can delete the "Secondary<br>
Chilled Water Loop" to fix it.<br>
<br>
Danny<br>
<br>
On Fri, 4 Dec 2020 at 16:41, <<a href="mailto:equest-users-request@lists.onebuilding.org" target="_blank">equest-users-request@lists.onebuilding.org</a>> wrote:<br>
><br>
> Send Equest-users mailing list submissions to<br>
> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
><br>
> To subscribe or unsubscribe via the World Wide Web, visit<br>
> <a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><br>
><br>
> or, via email, send a message with subject or body 'help' to<br>
> <a href="mailto:equest-users-request@lists.onebuilding.org" target="_blank">equest-users-request@lists.onebuilding.org</a><br>
><br>
> You can reach the person managing the list at<br>
> <a href="mailto:equest-users-owner@lists.onebuilding.org" target="_blank">equest-users-owner@lists.onebuilding.org</a><br>
><br>
> When replying, please edit your Subject line so it is more specific<br>
> than "Re: Contents of Equest-users digest..."<br>
> Today's Topics:<br>
><br>
> 1. Re: Equest-users Digest, Vol 153, Issue 1 (Morteza Kasmai)<br>
><br>
><br>
><br>
> ---------- Forwarded message ----------<br>
> From: Morteza Kasmai <<a href="mailto:morteza.kasmai@gmail.com" target="_blank">morteza.kasmai@gmail.com</a>><br>
> To: <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
> Cc:<br>
> Bcc:<br>
> Date: Fri, 4 Dec 2020 10:35:16 -0500<br>
> Subject: Re: [Equest-users] Equest-users Digest, Vol 153, Issue 1<br>
><br>
> Dear all,<br>
><br>
><br>
> I would appreciate it if you would provide your thoughts/suggestions on the issue that I have with zero design flow in the secondary chilled water loop, as described in the email below.<br>
><br>
><br>
> Regards,<br>
><br>
> Morteza Kasmaei<br>
> Senior Architect<br>
><br>
> LEED AP BD+C, GGP<br>
><br>
><br>
> On Wed, Dec 2, 2020 at 1:45 AM <<a href="mailto:equest-users-request@lists.onebuilding.org" target="_blank">equest-users-request@lists.onebuilding.org</a>> wrote:<br>
>><br>
>> Send Equest-users mailing list submissions to<br>
>> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
>><br>
>> To subscribe or unsubscribe via the World Wide Web, visit<br>
>> <a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><br>
>><br>
>> or, via email, send a message with subject or body 'help' to<br>
>> <a href="mailto:equest-users-request@lists.onebuilding.org" target="_blank">equest-users-request@lists.onebuilding.org</a><br>
>><br>
>> You can reach the person managing the list at<br>
>> <a href="mailto:equest-users-owner@lists.onebuilding.org" target="_blank">equest-users-owner@lists.onebuilding.org</a><br>
>><br>
>> When replying, please edit your Subject line so it is more specific<br>
>> than "Re: Contents of Equest-users digest..."<br>
>> Today's Topics:<br>
>><br>
>> 1. Secondary Chilled Water Loop has zero design flow (Morteza Kasmai)<br>
>><br>
>><br>
>><br>
>> ---------- Forwarded message ----------<br>
>> From: Morteza Kasmai <<a href="mailto:morteza.kasmai@gmail.com" target="_blank">morteza.kasmai@gmail.com</a>><br>
>> To: <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
>> Cc:<br>
>> Bcc:<br>
>> Date: Tue, 1 Dec 2020 14:19:17 -0500<br>
>> Subject: [Equest-users] Secondary Chilled Water Loop has zero design flow<br>
>><br>
>> Dear eQUEST experts,<br>
>><br>
>><br>
>> Attached are pd2 and inp files of the model that was built with eQUEST 3-65 7175 DOE 2.2.<br>
>><br>
>> Although the secondary chilled water loop complies with G3.1.10&11 requirements, when I run the model encounter the following error. Could you please let me know what I’m missing?<br>
>><br>
>><br>
>> ***ERROR************************************************************<br>
>> Loop: Secondary Chilled Wate Loop has zero design flow.<br>
>> Check input for consistency, or specify design loads.<br>
>><br>
>><br>
>> ****** FATAL DESIGN ERRORS IN SYSTEMS ******<br>
>><br>
>><br>
>> Thank you for your time.<br>
>><br>
>><br>
>> Morteza<br>
>><br>
>> Morteza Kasmaei<br>
>> Senior Architect<br>
>><br>
>> LEED AP BD+C, GGP<br>
>><br>
>><br>
>><br>
>><br>
>><br>
>><br>
>><br>
>> _______________________________________________<br>
>> Equest-users mailing list<br>
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><br>
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