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<p class=MsoNormal><font size=3 color=blue face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:blue'>Mike,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:blue'>Indeed it is difficult to get all zones
into the t-stat throttling range with 2-pipe fan coils; especially important for
LEED certification if the building is being simulated based on ASHRAE Appendix
G requirements. I’ve tried the setting up the 2-pipe circulation loop
control with a SNAP command and base it on outdoor air temp (55° F for <st1:City
w:st="on"><st1:place w:st="on">Boston</st1:place></st1:City> area) but the hours
still exceed 3%. I will try the SCHEDULE command to see if I get less under
cooled/heated hours.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:blue'>Thank you,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:blue'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:blue'>Jeff<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:blue'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=1 color=blue face=Arial><span style='font-size:
7.5pt;font-family:Arial;color:blue'>Jeff Staller</span></font><font color=blue><span
style='color:blue'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=blue face=Arial><span style='font-size:
7.5pt;font-family:Arial;color:blue'>CTG Energetics</span></font><font
color=blue><span style='color:blue'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=blue face=Arial><span style='font-size:
7.5pt;font-family:Arial;color:blue'>949-428-6293</span></font><o:p></o:p></p>
</div>
<div>
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face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font face=Tahoma><span
style='font-family:Tahoma'> Mike Tillou [mailto:miket@etcgrp.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, February 23, 2007
1:24 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Jeff Staller; BLDG-SIM@gard.com<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [BLDG-SIM]
Water-to-Water Heat Pump Chillers and GLHE's</span></font><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 face="Lucida Sans Unicode"><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt;font-family:"Times New Roman"'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Jeff,</span></font><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt;font-family:"Times New Roman"'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>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 <st1:State
w:st="on"><st1:place w:st="on">ON/OFF/TEMP</st1:place></st1:State> 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><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt;font-family:"Times New Roman"'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Mike</span></font><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt;font-family:"Times New Roman"'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face="Swis721 Blk BT"><span style='font-size:
10.0pt;font-family:"Swis721 Blk BT"'>Michael Tillou, PE</span></font><font
size=3 face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'>
<br>
</span></font><font size=1 face="Swis721 Blk BT"><span style='font-size:7.5pt;
font-family:"Swis721 Blk BT"'>ETC Group - Energy Engineering for a Sustainable
Future</span></font><font size=3 face="Times New Roman"><span style='font-size:
12.0pt;font-family:"Times New Roman"'> <br>
</span></font><font size=1 face="Swis721 Blk BT"><span style='font-size:7.5pt;
font-family:"Swis721 Blk BT"'>Ph:413-458-9870</span></font><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'>
<o:p></o:p></span></font></p>
</div>
<blockquote style='margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><span style='font-weight:bold'>From:</span></b> BLDG-SIM@gard.com
[mailto:BLDG-SIM@gard.com] <b><span style='font-weight:bold'>On Behalf Of </span></b>Jeff
Staller<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, February 23, 2007
1:57 PM<br>
<b><span style='font-weight:bold'>To:</span></b> BLDG-SIM@gard.com<br>
<b><span style='font-weight:bold'>Subject:</span></b> [BLDG-SIM] Water-to-Water
Heat Pump Chillers and GLHE's</span></font><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt;font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt;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 size=2 face="Times New Roman"><span style='font-size:
10.0pt;font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt;font-family:"Times New Roman"'>Thanks,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt;font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt;font-family:"Times New Roman"'>Jeff<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Jeff Staller, CEM</span></font><font
color=navy><span style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>CTG Energetics</span></font><font
color=navy><span style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>949-428-6293<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Lucida Sans Unicode"><span
style='font-size:10.0pt;color:navy'> </span></font><font size=3
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"Times New Roman";color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Lucida Sans Unicode"><span
style='font-size:10.0pt;color:navy'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face="Lucida Sans Unicode"><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<pre><font size=2 face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>==================<o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>You received this e-mail because you are subscribed <o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>to the BLDG-SIM@GARD.COM mailing list. To unsubscribe <o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>from this mailing list send a blank message to <o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>BLDG-SIM-UNSUBSCRIBE@GARD.COM<o:p></o:p></span></font></pre></blockquote>
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