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<DIV><FONT face=Arial size=2>Mr. Tian:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I believe you need to change the heating water
supply temperature in the heating loop attached to the heat pump chiller
system to 130F or lower. This is pretty much a limitation of an actual chiller
used in a heat pump configuration that this model simulates.
The refrigerant temperature in a typical chiller condenser isn't
hot enough to raise the condenser water temperature to any warmer than
this. In my experience, even 130F is pushing it.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Rick Routh<BR>Routh Consulting Engineers,
Inc.<BR>P.O. Box 3187<BR>Pasco, WA 99302<BR>509-547-8262<BR>509-542-0650
FAX<BR><A
href="mailto:routhconsultingengineers@charter.net">routhconsultingengineers@charter.net</A></FONT></DIV>
<DIV> </DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=tianzhen9@yahoo.com href="mailto:tianzhen9@yahoo.com">Zhen Tian</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=BLDG-SIM@gard.com
href="mailto:BLDG-SIM@gard.com">BLDG-SIM@gard.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, November 21, 2007 4:03
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [BLDG-SIM] Error in eQUEST
example file LP2LPHP.inp</DIV>
<DIV><BR></DIV>Dear all,<BR><BR>I tried to setup a loop-to-loop heat-pump
system. I used the example file LP2LPHP.inp from doe2.com. However, when I run
the example file, I got the following error report: "HW design temperature too
hight for loop-to-loop heat-pump. Errors during HVAC simulation
setup-abortion."<BR><BR>In the detailed simulation file, I got the error:
"chiller 1 has a design HW temperature too high for a loop-to-loop heat-pump
(max 130F)."<BR><BR>Does someone have an idea what is the problem with the
loop-to-loop heat-pump example file and how can I solve this
problem?<BR><BR>Thanks a lot in advance.<BR><BR>Regards,<BR><BR>David<BR>
<P>
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