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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=110421519-08022010>Varkie,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=110421519-08022010></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=110421519-08022010>I have used eQUEST for the GSHP and found that it
oversizes the CW loop where it is working with a very low delta T (2F) and hence
had a high pump energy component. I tried to solve this by undersizing the
loop to get a higher deltaT and at that point got almost 1/4th the pump
energy. I dont know if others have faced this, it would be great to hear
about other solutions to this. </SPAN></FONT></DIV>
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class=110421519-08022010></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=110421519-08022010>'thanks</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=110421519-08022010>Amarpreet</SPAN></FONT></DIV>
<DIV> </DIV>
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<FONT face=Tahoma size=2><B>From:</B> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Varkie C
Thomas<BR><B>Sent:</B> Monday, February 08, 2010 10:55 AM<BR><B>To:</B>
bldg-sim@onebuilding.org<BR><B>Subject:</B> [Bldg-sim] GSHP and PV using
eQUEST<BR></FONT><BR></DIV>
<DIV></DIV>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 12pt"><FONT face=Calibri>Are there any sample input files that
show how to use the PV input forms, explain what the input fields mean, and how
the results are calculated? Has the eQUEST PV analysis and results been
checked with other PV programs?<o:p></o:p></FONT></SPAN></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 12pt"><FONT face=Calibri>Attached are results for a building
that has PV and GSHP. The .inp and .pd2 files are in the zipped
folder. The building model is a simplified layout of the CCGT building
that was awarded LEED Platinum. The questions are in italics (PV in red and GSHP
in blue). The options to look at are 4 and 4a (PV Surface and Shade Mount)
and 5 and 5b (GSHP 200'-8x4 and 100'-2x2). <o:p></o:p></FONT></SPAN></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 12pt"><o:p><FONT face=Calibri> </FONT></o:p></SPAN></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><FONT face=Calibri><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 12pt">ECO-3</SPAN></B><SPAN style="FONT-SIZE: 12pt"> shows the
electric energy for lights, equipment, cooling and fans.
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 12pt"><FONT face=Calibri><SPAN
style="mso-spacerun: yes"> </SPAN><o:p></o:p></FONT></SPAN></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><FONT face=Calibri><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 12pt">ECO-4</SPAN></B><SPAN style="FONT-SIZE: 12pt"> added PV
panels tilted at 30 degrees on the south window shades and on the roof.<SPAN
style="mso-spacerun: yes"> </SPAN>How did the program determine the
reduction in electric energy?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><FONT face=Calibri><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 12pt">ECO-4a</SPAN></B><SPAN style="FONT-SIZE: 12pt"> attached
the PV panels of the same area to fixed shade.<SPAN
style="mso-spacerun: yes"> </SPAN>Why did the electric energy use go
up?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 12pt"><o:p><FONT face=Calibri> </FONT></o:p></SPAN></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><FONT face=Calibri><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 12pt">ECO-5</SPAN></B><SPAN style="FONT-SIZE: 12pt"> added
GSHP � 200� deep and 8 x 4 configuration.<SPAN style="mso-spacerun: yes">
</SPAN>The lights, equipment and cooling load electric use goes down.<SPAN
style="mso-spacerun: yes"> </SPAN>The electric use for pumps and fans go
up and so also does the natural gas use for heating.<SPAN
style="mso-spacerun: yes"> </SPAN>What is the
explanation?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><FONT face=Calibri><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 12pt">ECO-5a</SPAN></B><SPAN style="FONT-SIZE: 12pt"> changed
the GSHP to 100� deep and 2 x 2 configuration.<SPAN
style="mso-spacerun: yes"> </SPAN>Why does this smaller system save more
energy?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 12pt"><o:p><FONT face=Calibri> </FONT></o:p></SPAN></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 12pt"><FONT face=Calibri>What are the different types of PV
systems? For this study I entered MC-SI.<SPAN style="mso-spacerun: yes">
</SPAN>What do the terms below mean and what should be their typical or default
values (my dumb guesses are shown in parenthesis)?<o:p></o:p></FONT></SPAN></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 12pt"><o:p><FONT face=Calibri> </FONT></o:p></SPAN></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><FONT face=Calibri><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 12pt">VOLTS-OPEN-CKT</SPAN></B><SPAN style="FONT-SIZE: 12pt">
(= 110)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><FONT face=Calibri><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 12pt">VOLTS/T-OPEN-CKT</SPAN></B><SPAN
style="FONT-SIZE: 12pt"> (= -0.004)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><FONT face=Calibri><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 12pt">AMPS-SHORT-CKT</SPAN></B><SPAN style="FONT-SIZE: 12pt">
(= 10)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><FONT face=Calibri><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 12pt">AMPS/T-SHORT-CKT</SPAN></B><SPAN
style="FONT-SIZE: 12pt"> (= -0.001)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><FONT face=Calibri><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 12pt">VOLTS-MAX-PWR</SPAN></B><SPAN style="FONT-SIZE: 12pt">
(= 75)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><FONT face=Calibri><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 12pt">AMPS-MAX-PWR</SPAN></B><SPAN style="FONT-SIZE: 12pt"> (=
5)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><FONT face=Calibri><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 12pt">MIN-TRACK-VOLTS</SPAN></B><SPAN style="FONT-SIZE: 12pt">
(= 0)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><FONT face=Calibri><B
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 12pt">MAX-TRACK-VOLTS</SPAN></B><SPAN style="FONT-SIZE: 12pt">
(=110)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 12pt"><o:p><FONT face=Calibri> </FONT></o:p></SPAN></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 12pt"><FONT face=Calibri>The original analysis was with
DOE2.1E which does not have PV analysis.<SPAN style="mso-spacerun: yes">
</SPAN>The study assumed that the light energy corresponds to the solar energy
and about 10% of the direct solar energy was assumed to be converted to 110V
electricity.<o:p></o:p></FONT></SPAN></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 12pt"><o:p><FONT face=Calibri> </FONT></o:p></SPAN></P>
<P class=MsoNoSpacing style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 12pt"><FONT face=Calibri>I have sent this message before and
received no response.<SPAN style="mso-spacerun: yes"> </SPAN>Has anyone
used the eQUEST program�s GSHP and PV analysis for energy code compliance and
LEED certification?<o:p></o:p></FONT></SPAN></P></BODY></HTML>