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I can think of options but none of them are stellar:<br>
<br>
1) make your reheat loop a separate primary loop -- this is good in
that you can model heat recovery more closely. The temperature in
this reheat loop will typically be lower allowing for good pick up
from the chiller condenser. However, you will now have to split
your boilers onto the two loops and create a part load curve for
them that you feel correctly reflects the gas input at varying loads
(non-trivial).<br>
<br>
2) Artificially drop the temperature of your steam primary loop to
get more heat recovery from the chillers. You will have to watch
your pump flows but, unless you are modelling pipe losses the impact
should be small I think. <br>
<br>
<br>
<div class="moz-cite-prefix">On 09/02/2016 10:55 AM, Bikesh Dahal
wrote:<br>
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<p class="MsoNormal"><span style="color:#1F497D">Unfortunately
it is. So, how is this normally done. Use excel spreadsheet
to calculate savings? Or is there a work around to it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
Brian Fountain [<a class="moz-txt-link-freetext" href="mailto:bfountain@greensim.com">mailto:bfountain@greensim.com</a>] <br>
<b>Sent:</b> Tuesday, February 09, 2016 10:47 AM<br>
<b>To:</b> Bikesh Dahal;
<a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Heat Recovery Chiller<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Heat recovery
from chillers is a little tricky in eQUEST. In order to
recover heat, the condenser loop supply temperature must be
higher than the heating loop return temperature. Doing that
typically increases the lift on the chiller increasing the
electrical input energy. <br>
<br>
You stated you couldn't recover to your reheat loop -- is it a
secondary loop? Unfortunately no primary equipment can be
attached to secondary loops.<o:p></o:p></p>
<div>
<p class="MsoNormal">On 09/02/2016 10:39 AM, Bikesh Dahal
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal">Hi Everyone,<o:p></o:p></p>
<p class="MsoNormal">I am working on a project where I have a
heat recovery chiller that is recovering heat from IT room
units in a hospital and then providing heat to VAV reheat
systems for other spaces. I am trying to model this in
equest and not getting the desired result. <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">eQuest is not letting me connect to
reheat loop. And when I connect it to my steam loop, I see
no heating savings whereas I see increased cooling use. <o:p></o:p></p>
<p class="MsoNormal">Anyone has any ideas on how to model this
properly?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt">Bikesh
Dahal, BEMP</span></b><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt">Associate</span></b><o:p></o:p></p>
<p class="MsoNormal"><b><i><span style="color:#006600"> </span></i></b><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt"><img
id="Picture_x0020_1"
src="cid:part1.07090709.01060708@greensim.com"
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width="134"></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt">159 West
25th Street</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt">New York,
NY 10001</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt">tel:
212-529-5969, ext. 318</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt">fax:
212-529-6023</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:blue"><a
moz-do-not-send="true" href="mailto:bdahal@emegroup.com"><a class="moz-txt-link-abbreviated" href="mailto:bdahal@emegroup.com">bdahal@emegroup.com</a></a></span><o:p></o:p></p>
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style="font-size:9.0pt;color:#1F497D"><a
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<br>
<br>
<o:p></o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>Equest-users mailing list<o:p></o:p></pre>
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