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<DIV><SPAN class=354035720-23022007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=354035720-23022007>Jeff,</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=354035720-23022007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=354035720-23022007>My
experience is that it takes some effort to properly calibrate a 2-pipe
system in eQuest, especially if you're trying to get all your zones into
the t-stat throttling range so you don't have a lot of unmet heating and cooling
hours. I've had the most success operating the 2-pipe circulation loop
using the SCHEDULED command. You can define a heating and cooling
schedule of type ON/OFF/TEMP where the temp value you enter is either a zone or
outside air lockout temp. Leave yourself enough of a deadband to minimize
bouncing back and forth between heating and cooling on an hourly basis.
You may also need to disable heating or cooling during certain parts of the year
(ie: You may not want your system to switch from cooling to heating for 1-2
hours because of a cold August morning.)</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=354035720-23022007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=354035720-23022007>Mike</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=354035720-23022007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=354035720-23022007></SPAN></FONT><SPAN lang=en-us><FONT
face="Swis721 Blk BT" size=2>Michael Tillou, PE</FONT></SPAN> <BR><SPAN
lang=en-us><FONT face="Swis721 Blk BT" size=1>ETC Group - Energy Engineering for
a Sustainable Future</FONT></SPAN> <BR><SPAN lang=en-us><FONT
face="Swis721 Blk BT" size=1>Ph:413-458-9870</FONT></SPAN> </DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B>
BLDG-SIM@gard.com [mailto:BLDG-SIM@gard.com] <B>On Behalf Of </B>Jeff
Staller<BR><B>Sent:</B> Friday, February 23, 2007 1:57 PM<BR><B>To:</B>
BLDG-SIM@gard.com<BR><B>Subject:</B> [BLDG-SIM] Water-to-Water Heat Pump
Chillers and GLHE's<BR><BR></FONT></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'">In eQuest I am
attempting to model a proposed system that utilizes a ‘well-water-to-water
heat pump’ type chiller that will be attached to a vertical well ground loop
heat exchanger. The chillers are modular and cycle on and off to meet demand,
so they operate at a constant efficiency. They will be providing HW and
CHW to 2-pipe fan coil units. The DOE2.2 documentation indicates this
chiller type is Heat-Pump and that this chiller type can only be attached to
lake/well water loop. By selecting the lake/well water loop, I am unable
to define the vertical well characteristics, i.e well depth, configuration,
etc. Does anyone know of a way to attach the Heat-Pump type chiller to a
vertical well system? If not, is there a method to better describe the
capacity of the lake/well loop? And finally, does anyone have experience
modeling this system type and can provide any
insight?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'">Thanks,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'">Jeff<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Jeff Staller,
CEM</SPAN></FONT><FONT color=navy><SPAN
style="COLOR: navy"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">CTG
Energetics</SPAN></FONT><FONT color=navy><SPAN
style="COLOR: navy"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">949-428-6293<o:p></o:p></SPAN></FONT></P>
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style="FONT-SIZE: 10pt; COLOR: navy"> </SPAN></FONT><FONT
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<P class=MsoNormal><FONT face="Lucida Sans Unicode" size=2><SPAN
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P></DIV><PRE>
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