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<DIV dir=ltr align=left><SPAN class=320165222-24082009><FONT face=Arial
color=#0000ff size=2>Eric,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=320165222-24082009><FONT face=Arial
color=#0000ff size=2>I was working on a similar problem a while ago. I was
unable to find any way to control the heat recovery chiller operation based on
the Hot Water Loop loads (chillers would only sequence on the chilled water
loop load). I ended up going the route of manipulating hourly results data in a
spreadsheet.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=320165222-24082009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=320165222-24082009><FONT face=Arial
color=#0000ff size=2>Good Luck, and if you do determine a way to accomplish
this, please post to report.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=320165222-24082009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=320165222-24082009><FONT face=Arial
color=#0000ff size=2>Regards,</FONT></SPAN></DIV>
<DIV> </DIV>
<DIV align=left><FONT face=Arial size=2>Molly Curtz, P.E.</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Mechanical Engineer</FONT></DIV>
<DIV align=left><FONT face=Arial size=2></FONT> </DIV>
<DIV align=left><FONT face=Arial size=2>Arup</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>403 Columbia St., Suite 220</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Seattle, WA 98104</FONT></DIV>
<DIV align=left><FONT face=Arial size=2><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">
<DIV align=left>direct: 206 493 2234</DIV>
<DIV align=left><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">tel: 206 749
9674 ext. 25534</SPAN></FONT></SPAN></FONT></FONT></DIV></DIV>
<DIV align=left><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">fax: 206 749
0665</SPAN></DIV>
<DIV align=left><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">molly.curtz@arup.com</SPAN></DIV>
<DIV align=left><FONT face=Arial size=2><A
href="http://www.arup.com/">www.arup.com</A></FONT></DIV>
<DIV> </DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Eric
O'Neill<BR><B>Sent:</B> Friday, August 21, 2009 6:39 AM<BR><B>To:</B> Xavier
Garcia Casals<BR><B>Cc:</B>
equest-users@lists.onebuilding.org<BR><B>Subject:</B> Re: [Equest-users] Heat
recovery chiller<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Thanks
for the response Xavier,<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">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: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">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: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Eric<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<DIV>
<DIV
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; BORDER-LEFT: medium none; PADDING-TOP: 3pt; BORDER-BOTTOM: medium none">
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><B><SPAN
style="FONT-SIZE: 10pt; COLOR: windowtext; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; COLOR: windowtext; FONT-FAMILY: 'Tahoma','sans-serif'">
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: 0.5in"><o:p> </o:p></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in">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: 0.5in"><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'">All,</SPAN><o:p></o:p></P>
<P style="MARGIN-LEFT: 0.5in"><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: 0.5in"><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: 0.5in"><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'">Thanks,</SPAN><o:p></o:p></P>
<P style="MARGIN-LEFT: 0.5in"><B><I><SPAN
style="COLOR: #006600; FONT-FAMILY: 'Garamond','serif'">Eric
O'Neill</SPAN></I></B><o:p></o:p></P>
<P style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Garamond','serif'">Mechanical Engineer,
LEED<SUP>AP</SUP></SPAN><o:p></o:p></P>
<P style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Garamond','serif'">Michaels
Engineering</SPAN><o:p></o:p></P>
<P style="MARGIN-LEFT: 0.5in"><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: 0.5in"><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: 0.5in"><SPAN
style="FONT-SIZE: 7.5pt; FONT-FAMILY: 'Arial','sans-serif'">direct:
608-785-3328</SPAN><o:p></o:p></P>
<P style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 7.5pt; FONT-FAMILY: 'Arial','sans-serif'">main:
608-785-1900</SPAN><o:p></o:p></P>
<P style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 7.5pt; FONT-FAMILY: 'Arial','sans-serif'">fax:
608-784-2270</SPAN><o:p></o:p></P>
<P style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 7.5pt; FONT-FAMILY: 'Arial','sans-serif'"><A
href="mailto:elo@michaelsengineering.com">elo@michaelsengineering.com</A></SPAN><o:p></o:p></P>
<P style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 7.5pt; FONT-FAMILY: 'Arial','sans-serif'"><A
href="http://www.michaelsengineering.com">http://www.michaelsengineering.com</A></SPAN><o:p></o:p></P>
<P style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"><<Water
Loops.png>> <<Heat Recovery Setup.png>> </SPAN><o:p></o:p></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><o:p> </o:p></P>
<DIV class=MsoNormal style="MARGIN-LEFT: 0.5in; TEXT-ALIGN: center"
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<HR align=center width="90%" SIZE=4>
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<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><o:p> </o:p></P>
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align=center><IMG id=_x0000_i1026 height=588 src="cid:320165222@24082009-28DB"
width=908 border=0><o:p></o:p></P>
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align=center><IMG id=_x0000_i1028 height=548 src="cid:320165222@24082009-28E2"
width=731 border=0><o:p></o:p></P><PRE style="MARGIN-LEFT: 0.5in"><o:p> </o:p></PRE><PRE style="MARGIN-LEFT: 0.5in; TEXT-ALIGN: center">
<HR align=center width="90%" SIZE=4>
</PRE><PRE style="MARGIN-LEFT: 0.5in"><o:p> </o:p></PRE><PRE style="MARGIN-LEFT: 0.5in">_______________________________________________<o:p></o:p></PRE><PRE style="MARGIN-LEFT: 0.5in">Equest-users mailing list<o:p></o:p></PRE><PRE style="MARGIN-LEFT: 0.5in"><A href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</A><o:p></o:p></PRE><PRE style="MARGIN-LEFT: 0.5in">To unsubscribe from this mailing list send a blank message to <A href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</A><o:p></o:p></PRE><PRE style="MARGIN-LEFT: 0.5in"> <o:p></o:p></PRE>
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<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in">-- <BR><BR><o:p></o:p></P><PRE style="MARGIN-LEFT: 0.5in"><B><SPAN lang=CA style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial','sans-serif'"> </SPAN></B><o:p></o:p></PRE><PRE style="MARGIN-LEFT: 0.5in"><B><SPAN lang=ES-TRAD style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial','sans-serif'">Xavier García Casals</SPAN></B><o:p></o:p></PRE><PRE style="MARGIN-LEFT: 0.5in"><SPAN lang=ES-TRAD style="FONT-FAMILY: 'Arial','sans-serif'"> </SPAN><o:p></o:p></PRE><PRE style="MARGIN-LEFT: 0.5in"><SPAN lang=ES-TRAD style="FONT-SIZE: 8pt; FONT-FAMILY: 'Arial','sans-serif'">Tel: (+34) 91 843 19 85</SPAN><o:p></o:p></PRE><PRE style="MARGIN-LEFT: 0.5in"><SPAN lang=ES-TRAD style="FONT-SIZE: 8pt; FONT-FAMILY: 'Arial','sans-serif'">Móvil: 660 22 94 45</SPAN><o:p></o:p></PRE><PRE style="MARGIN-LEFT: 0.5in"><SPAN lang=ES-TRAD style="FONT-SIZE: 8pt; FONT-FAMILY: 'Arial','sans-serif'"><A href="mailto:xgcasals@telefonica.net">xgcasals@telefonica.net</A></SPAN><o:p></o:p></PRE><PRE style="MARGIN-LEFT: 0.5in"><SPAN class=MsoHyperlink> </SPAN><o:p></o:p></PRE><PRE style="MARGIN-LEFT: 0.5in"><B><SPAN lang=CA style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial','sans-serif'"> </SPAN></B><o:p></o:p></PRE>
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lang=CA> </SPAN><o:p></o:p></P></DIV></DIV><pre>____________________________________________________________
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