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</head><body style="zoom: 0%;"><div dir="auto">Omer<br><br></div>
<div dir="auto">It seems to me that a loop-to-loop heat pump would better represent the system you are describing. It can feed hot water and chilled water loops rather than requiring a 2-pipe loop to dictate whether it is in heating or cooling mode. Further, it can respond to the higher of the heating or cooling loop loads.<br><br></div>
<div dir="auto">Brian</div>
<div class="gmail_quote" >On Jan 22, 2023, at 9:58 AM, Omer Moltay via Equest-users <<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a>> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<p>Dear All,</p>
<p>I am using two different 2 pipe loops for both HW and CHW
produced by a ground coupled heat pump. Each of these loops is
only in heating or cooling mode throughout the year. This is
necessary as eQuest requires a 2 pipe loop for modeling a chiller
heat pump (although the CHW 2 pipe loop might also have been a
cooling loop - but the result does not change).</p>
<p>Attached is a simple model that features what I have just
described. The simulation run always gives the error that there is
zero design flow in the loops, whatever I try (I have tried using
secondary loops as well but did not work).</p>
<p>It would help me a lot if anyone could point out what could be
wrong with this set-up?</p>
<p>Best,</p>
<p>Ömer Moltay, LEED AP BD+C, ASHRAE BEMP, ASHRAE CPMP <br>
Mimta EcoYapi, LEED Proven Provider <br>
Hekimsuyu Cad. 559. Sk. <br>
No:39 34255 Kucukkoy Istanbul Turkey <br>
Tel: 90-212-617-2296 <br>
Fax: 90-212-617-2297 <br>
Mobile: 90-533-957-1394 <br>
<a href="http://www.eco-yapi.com" target="_blank">www.eco-yapi.com</a>
</p>
<img id="Picture_x0020_1" src="cid:part1.d63W4iV3.cR42gVL1@mimtarch.com" class="" width="300" height="120" border="0">
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