<div dir="ltr">Dear Paul,<div>how I can get those data points to build the EIR-fPLR&DT curve? is it available in the manuals and chillers data sheets? or I should ask it from the suppliers directly?</div><div><br></div>
<div>Please advice,</div><div><br></div><div>Mohammad Al-Masri</div><div>Simulation Engineer</div><div>LEED AP BD+C, CAPM</div><div><br></div><div><div class="gmail_quote">On Tue, Aug 17, 2010 at 4:45 PM, Paul Riemer <span dir="ltr"><<a href="mailto:Paul.Riemer@dunhameng.com">Paul.Riemer@dunhameng.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">If you ask a manufacturer's rep how a chiller unloads at part
load, the answer might be "good". So I suggest you specifically
request part load points at 10% intervals with and without AHRI condenser relief.
That should enable you to make or confirm both the EIR-fPLR&DBT and the EIR-fCHWT&DBT
curves. </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">If you want to go even deeper, you could ask for those part load
points at different chilled water supply temperatures and then make or confirm a
Cap-fCHWT&DBT curve. That seems like overachieving to me, but my chilled
water supply temperatures rarely deviate very far from AHRI standard conditions.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Good luck,</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
<p class="MsoNormal" style="text-autospace:none"><b><span style="font-size:10.0pt;color:#5F574F">Paul Riemer, PE, LEED AP</span></b><span style="font-size:11.0pt;color:#1F497D"> </span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;color:#5F574F">Associate / Mechanical</span><span style="font-size:11.0pt;color:#1F497D"></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;color:#5F574F">Direct: 612-465-7696</span><span style="font-size:11.0pt;color:#1F497D"></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;color:#5F574F"> </span></p>
<p class="MsoNormal"><b><span style="color:#C4262E">DUNHAM</span></b><span style="font-size:10.0pt;color:#5F574F"><br>
Celebrating 50 Years of Service</span><span style="font-size:11.0pt;color:#5F574F"></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
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<p class="MsoNormal" style="margin-left:.5in"><b><span style="font-size:10.0pt">From:</span></b><span style="font-size:10.0pt"> <a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Carol
Gardner<br>
<b>Sent:</b> Tuesday, August 17, 2010 9:22 AM<br>
<b>To:</b> Mohammad Almasri<br>
<b>Cc:</b> <a href="mailto:eQUEST-users@onebuilding.org" target="_blank">eQUEST-users@onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Modeling Variable Speed Air Cooled Screw
Chillers</span></p>
</div><div><div></div><div class="h5">
<p class="MsoNormal" style="margin-left:.5in"> </p>
<p class="MsoNormal" style="margin-right:0in;margin-bottom:12.0pt;margin-left:.5in">Mohammad,<br>
<br>
You will need to ask the manufacturer for information on how the chiller
unloads at part load so you can create an EIR-FPLR curve of your own. That
shouldn't be too hard. It looks like there's no problem with having the water
from the chillers flow using variable speed pumps so that part's there if you
want it. Let me know if you need help creating a curve.<br>
<br>
Carol</p>
<div>
<p class="MsoNormal" style="margin-left:.5in">On Tue, Aug 17, 2010 at 1:54 AM,
Mohammad Almasri <<a href="mailto:malmasri@ems-int.com" target="_blank">malmasri@ems-int.com</a>>
wrote:</p>
<p class="MsoNormal" style="margin-left:.5in">Hi all,<br>
<br>
How we can model a Variable Speed "Air Cooled" Screw Chillers in
eQUEST? The<br>
available variable speed chillers curves in eQUEST are only for the<br>
centrifugal .<br>
<br>
Thanks,<br>
<br>
Mohammad Al-Masri<br>
Simulation Engineer<br>
LEED AP BD+C, CAPM<br>
<br>
<br>
<br>
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<br clear="all">
<br>
-- <br>
Carol Gardner PE</p>
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