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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am trying to model a loop to loop heat pump that will take
heat out of well water constantly at 50F and put it into a hot water loop at
125F. I am using the loop to loop heat pump to model this design and it seems
that things are working pretty good…except for the actual heat pump. For
whatever reason, the heat pumps are costing significantly more to operate than
a boiler system. However, with a COP of 3.5 and the current utility rates, the
heat pumps should cost less to operate.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Does anybody have experience with the loop to loop heat
pumps in eQuest and the associated performance curves that might shine some
light on the problem here? I am not sure if the loop to loop heat pump in
eQuest is designed to model the system I have described and my thought is that
something is going wrong with the performance curves. Lastly, is there a way
to “eliminate” the performance curves and have eQuest run the analysis
assuming a constant COP=3.5? This would allow me to see if the performance
curves really are the issue. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thank you all for your help and time!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><strong><b><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Josh Doherty</span></font></b></strong><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span><o:p></o:p></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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