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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks for the response Xavier,<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 cooling load is 24/7 and is located in an interior zone of a
building located in a cold climate, so there are simultaneous heating and
cooling periods. What I’m hoping to create is a system that will act much
like a boiler, in that whenever the HW loop needs heat, the HTREC chiller runs
and provides heat while cooling the chilled water loop. I added the HTREC
chiller because it’s supposed to be able to supply higher condensing
water temperatures (which I need for my HW loops) than my other boilers are.
The DOE2.2 documentation leads me to believe that this chiller would
automatically sequence on whenever there is a heating load on the loop, but
this doesn’t seem to be the case. Even if I delete the HTREC chiller and make
my other three chillers recover heat to the HW loop, none of them do. <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 coils on the condensing loop are for the waterside
economizer. There is more than sufficient heat for heat recovery (cooling load>>heating
load), so I still need an economizer, although I want it to be secondary. I don’t
know if I can sequence that. My guess now after thinking about it is that the
system is economizing whenever there is a heating load, so the chillers don’t
sequence on. Is there a way to make the chillers run if there is a load on the
HW loop, but economize the remainder?<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'>Eric<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>
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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal style='margin-left:.5in'><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'> Xavier
Garcia Casals [mailto:xgcasals@telefonica.net] <br>
<b>Sent:</b> Friday, August 21, 2009 3:20 AM<br>
<b>To:</b> Eric O'Neill<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Heat recovery chiller<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
<p class=MsoNormal style='margin-left:.5in'>Hi Eric,<br>
Are you sure your heating load is simultaneous with the cooling load (is not
enough to have cooling load all the year arround if it does not coincidence in
time with the heating load: Chiller off)?. Also, did you check that when there
is heating load the Htrc chiller is scheduled before than the other 3 chillers
you have? Otherwise would be impossible to recover heat. What about those coils
you have on the condensing loop? Aren't they taking away the heat you want to
recover from the condenser?<br>
<br>
En/na Eric O'Neill ha escrit: <o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-family:"Calibri","sans-serif"'>All,</span><o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-family:"Calibri","sans-serif"'>I’m
trying to model a hot water loop</span> <span style='font-family:"Calibri","sans-serif"'>that’s
being heated entirely by a heat recovery chiller (htrec) and supplying heating
to a VAV</span> <span style='font-family:"Calibri","sans-serif"'>system.
I’d like to utilize</span> <span style='font-family:"Calibri","sans-serif"'>condenser</span>
<span style='font-family:"Calibri","sans-serif"'>heat prior to rejection to the
dry coolers (I have a large cooling load year around). The trouble is, even
though it appears like it is set up correctly,</span> <span style='font-family:
"Calibri","sans-serif"'>the system doesn’t want to reject ANY heat to the</span>
<span style='font-family:"Calibri","sans-serif"'>HW</span> <span
style='font-family:"Calibri","sans-serif"'>loop.</span> <span style='font-family:
"Calibri","sans-serif"'>When I just created the loop and ran a simulation,
eQuest gave me an error saying I had no primary heat source on the HW loop.</span>
<span style='font-family:"Calibri","sans-serif"'>I tried adding a dummy boiler
with virtually no capacity, and that got rid of the error and allowed me to
run, but I still had no heat going to my HW loop. </span><o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-family:"Calibri","sans-serif"'>Has
anyone had</span> <span style='font-family:"Calibri","sans-serif"'>success with
this?</span> <span style='font-family:"Calibri","sans-serif"'>When reading the
DOE2.2 dictionary, it appears this is exactly what the htrec chiller</span> <span
style='font-family:"Calibri","sans-serif"'>was designed to do, but nothing I
change makes any difference.</span> <span style='font-family:"Calibri","sans-serif"'>If
anyone’s</span> <span style='font-family:"Calibri","sans-serif"'>willing,
I can send you a copy of my input and pd2 files to look at.</span><o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-family:"Calibri","sans-serif"'>Thanks,</span><o:p></o:p></p>
<p style='margin-left:.5in'><b><i><span style='font-family:"Garamond","serif";
color:#006600'>Eric O'Neill</span></i></b><o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Garamond","serif"'>Mechanical
Engineer, LEED<sup>AP</sup></span><o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Garamond","serif"'>Michaels
Engineering</span><o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>400
Main Street, Ste 200</span><o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>La
Crosse, WI 54601</span><o:p></o:p></p>
<p style='margin-left:.5in'><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>direct:
608-785-3328</span><o:p></o:p></p>
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<p style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><<Water
Loops.png>> <<Heat Recovery Setup.png>> </span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
<div class=MsoNormal align=center style='margin-left:.5in;text-align:center'>
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<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
<p class=MsoNormal align=center style='margin-left:.5in;text-align:center'><img
border=0 width=908 height=588 id="_x0000_i1026"
src="cid:image001.png@01CA2230.3FDF3DD0"><o:p></o:p></p>
<p style='margin-left:.5in'><o:p> </o:p></p>
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border=0 width=731 height=548 id="_x0000_i1028"
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<pre style='margin-left:.5in'><o:p> </o:p></pre><pre style='margin-left:
.5in;text-align:center'>
<hr size=4 width="90%" align=center>
</pre><pre style='margin-left:.5in'><o:p> </o:p></pre><pre
style='margin-left:.5in'>_______________________________________________<o:p></o:p></pre><pre
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<p class=MsoNormal style='margin-left:.5in'>-- <br>
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<o:p></o:p></p>
<pre style='margin-left:.5in'><b><span lang=CA style='font-size:12.0pt;
font-family:"Arial","sans-serif"'> </span></b><o:p></o:p></pre><pre
style='margin-left:.5in'><b><span lang=ES-TRAD style='font-size:12.0pt;
font-family:"Arial","sans-serif"'>Xavier García Casals</span></b><o:p></o:p></pre><pre
style='margin-left:.5in'><span lang=ES-TRAD style='font-family:"Arial","sans-serif"'> </span><o:p></o:p></pre><pre
style='margin-left:.5in'><span lang=ES-TRAD style='font-size:8.0pt;font-family:
"Arial","sans-serif"'>Tel: (+34) 91 843 19 85</span><o:p></o:p></pre><pre
style='margin-left:.5in'><span lang=ES-TRAD style='font-size:8.0pt;font-family:
"Arial","sans-serif"'>Móvil: 660 22 94 45</span><o:p></o:p></pre><pre
style='margin-left:.5in'><span lang=ES-TRAD style='font-size:8.0pt;font-family:
"Arial","sans-serif"'><a href="mailto:xgcasals@telefonica.net">xgcasals@telefonica.net</a></span><o:p></o:p></pre><pre
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