<div>Thanks for all the responses. I think I figured it out:</div>
<div> </div>
<div>When you choose "WLHP" in the eQuest Wizard, it creates a PVVT system with a GSHP. The curve used to adjust HIR is based on a few data points, and did not perform very well at the temperatures I was using. A straight HP system selected in detailed edit mode did much better. I now realize that this is because the HIR curve was better for my purposes. I have now created curves based on the heat pumps spec'd for this job and the numbers are making more sense.
</div>
<div> </div>
<div>Thanks again for all the repsonses, thought I'd let everyone know, especially because PVVT is what is selected when you create a WLHP system with the wizard, and may need some detailed data edit tweaking.</div>
<div> </div>
<div>~Karen~<br><br> </div>
<div><span class="gmail_quote">On 8/6/07, <b class="gmail_sendername">Brandon Nichols</b> <<a href="mailto:BrandonN@hargis.biz">BrandonN@hargis.biz</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
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<div><span class="e" id="q_1143caa839ded31b_1">
<div dir="ltr" align="left"><span><font face="Courier New" color="#0000ff" size="2">Hello Karen,</font></span></div>
<div dir="ltr" align="left"><span><font face="Courier New" color="#0000ff" size="2"></font></span> </div>
<div dir="ltr" align="left"><span><font face="Courier New" color="#0000ff" size="2">"When so many things can go wrong, almost certainly more than one of them will go wrong at the same time" ... or something like that, according to Murphy. Recently I have been wrestling with a large heat pump system, and may be able to help a little.
</font></span></div>
<div dir="ltr" align="left"><span><font face="Courier New" color="#0000ff" size="2"></font></span> </div>
<div dir="ltr" align="left"><span><font face="Courier New" color="#0000ff" size="2">Have you adjusted your heat pomp efficiencies? Ground and water source heat pumps will have different efficiencies, if for no other reason than they are operating with different condenser water temperatures.
</font></span></div>
<div dir="ltr" align="left"><span><font face="Courier New" color="#0000ff" size="2"></font></span> </div>
<div dir="ltr" align="left"><span><font face="Courier New" color="#0000ff" size="2">Check this post...</font></span></div>
<div dir="ltr" align="left"><span><font face="Courier New" color="#0000ff" size="2"></font></span> </div>
<div dir="ltr" align="left"><span><font face="Courier New" color="#0000ff" size="2"><a onclick="return top.js.OpenExtLink(window,event,this)" href="http://elcca-exchange.blogspot.com/2007/03/ground-water-source-heat-pumps.html" target="_blank">
http://elcca-exchange.blogspot.com/2007/03/ground-water-source-heat-pumps.html</a></font></span></div>
<div dir="ltr" align="left"><span><font face="Courier New" color="#0000ff" size="2"></font></span> </div>
<div dir="ltr" align="left"><span><font face="Courier New" color="#0000ff" size="2">Next suspect, schedules... don't have a post for that yet, let me know the effect of efficiency adjustments and we'll go from there.
</font></span></div>
<div dir="ltr" align="left"><span><font face="Courier New" color="#0000ff" size="2"></font></span> </div>
<div dir="ltr" align="left"><span><font face="Courier New" color="#0000ff" size="2">Regards</font></span></div>
<div><font face="Arial" size="2"></font> </div>
<div align="left"><span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">
<div><span style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial"><span><font color="#000000">Brandon Nichols, PE</font></span></span></div>
<div><span style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial"><span><font color="#000000">Mechanical</font></span></span></div>
<div><span style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial"><font color="#000080"><strong>HARGIS ENGINEERS</strong></font></span></div>
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<p style="MARGIN: 0in 0in 0pt"><span style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial"><font color="#515151">Suite 1000</font></span></p>
<p style="MARGIN: 0in 0in 0pt"><span style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial"><font color="#515151">Seattle, WA 98101</font></span></p>
<p style="MARGIN: 0in 0in 0pt"><span style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial"><font color="#515151"><a onclick="return top.js.OpenExtLink(window,event,this)" href="http://www.hargis.biz/" target="_blank">
www.hargis.biz</a></font></span></p>
<p style="MARGIN: 0in 0in 0pt"><span style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial"><font color="#515151"> </font></span></p>
<p style="MARGIN: 0in 0in 0pt"><b><span style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial">d |</span></b><span style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial"> 206.436.04<span>0</span>0<span> </span><b>c |
</b>206.<span>228.8707</span></span></p>
<p style="MARGIN: 0in 0in 0pt"><span style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial"><span></span></span><font color="#515151"><b><span style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial">o |</span></b><span style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial">
206.448.3376<span> </span><b>f <span> </span>|</b> 206.448.4450</span></font></p></span>
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<font face="Tahoma" size="2"><b>From:</b> <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:BLDG-SIM@gard.com" target="_blank">BLDG-SIM@gard.com</a> [mailto:<a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:BLDG-SIM@gard.com" target="_blank">
BLDG-SIM@gard.com</a>] <b>On Behalf Of </b>Karen Walkerman<br><b>Sent:</b> Friday, August 03, 2007 5:20 PM<br><b>To:</b> <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:BLDG-SIM@gard.com" target="_blank">
BLDG-SIM@gard.com</a><br><b>Subject:</b> [BLDG-SIM] Trouble with Heat Pumps (eQuest)<br></font><br> </div>
<div></div>
<div>I apologize for all the emails I've sent out as of late. Thanks for all the input.</div>
<div> </div>
<div>I have another:</div>
<div> </div>
<div>I'm comparing a ground source heat pump to a heat pump loop with chiller and boiler. Trouble is, when I switch systems, the energy used by the heat pump to heat the space goes down only slightly as compared to the energy input by the boiler. My loop temperatures change between the systems (from heating temp of 40 F to 70 F), and COP rises accordingly. Right now the energy use of the two systems is off by about 85%!!
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<div> </div>
<div>Energy use for straight electric resistance heat is about the same as the electric use for a heat pump system. This is for a baseline model with 18% evenly distributed windows, R-19 batt insulation, R-38 ceilings, etc.
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<div> </div>
<div>I used the wizard to set up the equipment for all runs (I'm also having trouble in detailed edit mode). The water loop and the heat pump don't seem to be talking to one another. Can anyone help?</div>
<div> </div>
<div>Thanks,</div>
<div><br clear="all"><br>-- <br>Karen Walkerman<br>Second Law Consulting<br>802-238-0980<br><a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:kwalkerman@gmail.com" target="_blank">kwalkerman@gmail.com
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</pre></div></blockquote></div><br><br clear="all"><br>-- <br>Karen Walkerman<br>Second Law Consulting<br>802-238-0980<br><a href="mailto:kwalkerman@gmail.com">kwalkerman@gmail.com</a>