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Phil,<br>
<br>
Thank you for your very helpful assistance in getting subcoolers
working in a refrigeration version model in eQUEST. Your notes were
instrumental in resolving the problems I was having. It turns out I
left my liquid lines attached to the refrigeration system --
essentially the condenser -- rather than attaching them to the
subcooler. This was functionally bypassing the subcooler. Step 3 of
your notes pointed out the error. I also had not fully defined the
warmer loop before defining the cooler loop as described in step 2
of the refrigeration hierarchy guidance you shared.<br>
<br>
I greatly appreciate your assistance.<br>
<br>
Kind regards,<br>
<br>
Brian<br>
<br>
<div class="moz-cite-prefix">On 26/03/2020 11:43 a.m., Phil Jordan
wrote:<br>
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<div class="WordSection1">
<p class="MsoNormal">I remember this being tricky to add. Check
out the “Hierarchy Rules” (step 9) on page 9 of the DOE2
Refrigeration Dictionary:<o:p></o:p></p>
<p class="MsoNormal"><a
href="http://doe2.com/download/doe-22/DOE22Vol2r-DictionaryRefrigeration.pdf"
moz-do-not-send="true">http://doe2.com/download/doe-22/DOE22Vol2r-DictionaryRefrigeration.pdf</a><o:p></o:p></p>
<p class="MsoNormal">(Looks like the doe2.com site is down so
I’ve attached the relevant pages.)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Also attached are my notes on how I had
simulated mechanical subcooling in prior models (in an earlier
version of eQUEST – v3.61b, I think – but hopefully should
still apply to the latest version).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><b><span
style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#005E68">Phil
Jordan</span></b><o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> Equest-users <<a
href="mailto:equest-users-bounces@lists.onebuilding.org"
moz-do-not-send="true">equest-users-bounces@lists.onebuilding.org</a>>
<b>On Behalf Of </b>Brian Fountain via Equest-users<br>
<b>Sent:</b> Wednesday, March 25, 2020 6:00 PM<br>
<b>To:</b> <a
href="mailto:equest-users@lists.onebuilding.org"
moz-do-not-send="true">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Refrigeration version -
mechanical subcooler<o:p></o:p></p>
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<div>
<p class="MsoNormal"><br>
I have a model of a refrigerated warehouse in the
refrigeration version of eQUEST. It is running in version
7174 currently.
<br>
<br>
I am trying to add a mechanical subcooler to the model. I
can add the subcooler keywords, the PS-H for the subcooler
is generated but so far despite many control keyword
iterations, I am seeing no load on the subcooler and no
impact on the refrigeration system with its inclusion in the
model.<br>
<br>
Currently, my inputs are:<o:p></o:p></p>
<p><o:p> </o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal">"Subcooler 1" = SUBCOOLER <br>
TYPE = MECHANICAL<br>
ATTACH-TO = REFG-SYSTEM<br>
REFG-SYSTEM = "Refrigeration System"<br>
CAPACITY = {#PA("Subcool Cap TR")*3413}<br>
DESIGN-SUBCOOL-T = 40<br>
SST-SUBCOOL-TD = {60}<br>
SUPERHEAT-DT = {101-90}<br>
TEMP-CTRL = SATURATION-DT<br>
SATURATION-DT = 40<br>
SUCTION-CIRCUIT = "Low Temp Suction Circuit"<br>
..<br>
"Subcool liquid circuit" = REFG-CIRCUIT <br>
TYPE = LIQUID<br>
ATTACH-TO = SUBCOOLER<br>
SUBCOOLER = "Subcooler 1"<br>
..<o:p></o:p></p>
</blockquote>
<p class="MsoNormal"><br>
Has anyone successfully added mechanical subcooling to a
refrigeration version simulation?<br>
<br>
Many thanks,<br>
<br>
Brian<o:p></o:p></p>
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