I am beginning to get a bit frustrated with eQuest and its piping loops, particularly for ground source heat pumps. I have tried to model a ground loop heat exchanger connected to a water loop heat pump system. I set up primary/secondary piping loops with the well field the primary and the heat pump loop as secondary. This is the only way I have been able to associate the well pump with the HX and keep the HP loop pump in the mix. I have been able to specify pump for the well field heat exchanger as well as the heat pump loop. However, the well field pump runs continuously since the loop pump runs continuously. How does one get the well field pump to cycle based on loop demand (heat rejection/addition to allow the HP loop temperature to float)? I'm trying to maintain my loop temperature between 40 and 80F and the field flow rate is 60% of the HP loop flow rate.<br clear="all">
<br>-- <br>Ron Pecarina, PE, CEM, LEED-AP<br>Energy and Sustainable Design Consultants, Inc.<br>1128 Noblewood Drive<br>Billings, MT 59101<br>406-208-0227<br>