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<DIV><SPAN class=543033116-19042007></SPAN><FONT face=Arial><FONT
color=#0000ff><FONT
size=2>I have done a similar system once before but only at the schematic design level. I ended up having to use the lake/well option and estimate the source temp. I ended up using monthly source temps that I scheduled based on estimates from <SPAN
class=543033116-19042007>a</SPAN> borefield designer/contractor who did some separate modeling of the borefield. It took some iterations as I had to run the model on typicall; chiller/boiler systems first to get loads that he could then put into his borefield model. In the end it was probably accurate enough for the purposes of SD-<SPAN
class=543033116-19042007>
</SPAN>level system comparisons.</FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT
size=2></FONT></FONT></FONT> </DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=543033116-19042007>These models in equest baffle me as to why they have
such restrictions built-into them - perhaps the software developers can shed
light on their reasons for these restrictions, but it certainly is frustrating,
as you have found out...</SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=543033116-19042007></SPAN></FONT></FONT></FONT> </DIV>
<DIV><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN
class=543033116-19042007>Peter</SPAN></FONT></FONT></FONT></DIV>
<DIV><BR></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> BLDG-SIM@gard.com
[mailto:BLDG-SIM@gard.com] <B>On Behalf Of </B>nicole chen<BR><B>Sent:</B>
Thursday, April 19, 2007 1:51 AM<BR><B>To:</B>
BLDG-SIM@gard.com<BR><B>Subject:</B> [BLDG-SIM] Modeling Centralized GSHP in
Equest<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Arial','sans-serif'">Hi
Folks,</SPAN></P><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Arial','sans-serif'">
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><BR>I am attempting to simulate a
centralized GSHP using Equest. The plant side is supposed to be coupled with
vertical wells using ground loop HX. <FONT size=2>The cooling plant equipment is
supposed to be large heat pumps or centrifugal chillers that reverse operation
of evaporator and condenser when switching from cooling to heating. </FONT>The
airside is fan coil rather than room-level distributed heat
pumps. </P></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Arial','sans-serif'"> </SPAN>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Arial','sans-serif'"></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Arial','sans-serif'">#1: According to
doe-2.2 dictionary only lake/well loop is allowed to be attached to large water
–cooled HPs and chiller condensers. And WLHP is not allowed so. Is there any
method to model such a GSHP system in Equest? </SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Arial','sans-serif'"></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Arial','sans-serif'">#2: or can lake/well
be used to mimic ground source loops? Any experience or advice of using this
alternative is highly appreciated. </SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Arial','sans-serif'"></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Arial','sans-serif'">Tons of
thanks</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Arial','sans-serif'"></SPAN> </P><BR>--
<BR>Yours<BR>Nicole Chen </DIV><pre>____________________________________________________________
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