<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Behnam,</div><div><br></div><div>Loop field design has a lot of parameters. I suggest beginning with an autosize in eQuest based on the fairly standard design parameters of 200' deep, 15' oc spacing, ~15% glycol, ...</div><div><br></div><div>Adjust the quantity of boreholes until you meet the load. </div><div><br></div><div>There is much more detail that can be shared but if you're not familiar with GSHP in eQuest it will get you started. </div><div><br>- Matt H<div>Sent from mobile, please excuse typos. </div></div><div><br>On Apr 7, 2014, at 10:51 AM, behnam jowkar <<a href="mailto:behnamjowkar@gmail.com">behnamjowkar@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><span style="font-family:arial,sans-serif;font-size:13px">Dear All:</span><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">I am trying to model a ground loop heat pump system in equest, but I keep getting the following errors: " WLHP loop: Ground Loop has exceeded a hi/low alarm limit and will shut down associated HVAC equipment for the hour. Loop T: 17.91 Limit: 20.00. Verify that alarm limits are reasonable, verify primary equipment sizing, especially ground-loop heat-exchangers, and verify that the HP performance curves are suitable for the intended operating range." as well as "Ground-loop HX: Ground Loop Heat Exchanger 1 is undersized for the load and is producing an extreme temperature of -4F."</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">Since the design is a closed loop system (vertical pipes) I have created a GLHE of type 'Vertical Well-Sweden G-function', connected to a circulation loop of the type 'water loop heat pump'. I have also inserted the GSHP curves from DOE 22. I'm not sure if the problem is the parameters I have defined in the model, or from the way I have set things up in EQUEST. I would really appreciate it if someone with more experience than me can help me out with my problem.</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">Best Regards,</div><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">
Behnam</div><div><br></div>-- <br><div dir="ltr">Behnam Jowkar, MASc, BEng, LEED GA<div>Mechanical Engineer In Training</div><div>p: 416-716-5758</div><div>e: <a href="mailto:behnamjowkar@gmail.com" target="_blank">behnamjowkar@gmail.com</a></div>
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