<html><body><span style="font-family:Verdana; color:#000000; font-size:10pt;"><DIV>Hi everyone, </DIV>
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<DIV>Thought we'd share our answer to my original query. </DIV>
<DIV>Below is the process we landed on for creating a GSHP (or other) system once you're too deep into the Detailed Edit mode to go back. Typically one would avoid having to do this by defining all systems you may want to model while still in the Wizard. </DIV>
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<DIV>Carol: in regards to your response, while the issues surrounding building the system from within the DDE mode were myriad, knowing how to assign a system to a zone wasn't one of them. My question meant to deal specifically with backing-in a GSHP system. While this does point to the importance of being specific with our questions, your response didn't really seem to be addressing the issues.</DIV>
<DIV> </DIV>
<DIV>The Procedure-</DIV>
<DIV>Create the following components by right-clicking on the top icon in the left banner, "Project [project name]", </DIV>
<DIV>First create a <U>circulation loop</U> of the type "Water Loop HP." </DIV>
<DIV>This will prompt the creation of a <U>loop pump</U>.</DIV>
<DIV>Double-check to be sure that these components are connected: under Circulation Loop Properties, the "Loop Pump" input should contain the name of the pump you've just created.</DIV>
<DIV>Next, create a Ground Loop <U>Heat Exchanger</U>. You'll need to specify a type of HX; then hole depths, diameters, etc. </DIV>
<DIV>After you've set up these three elements you should see a diagram with the HX on the left and the circulation loop on the right when viewing from the Water-side HVAC tab.</DIV>
<DIV> </DIV>
<DIV>We then created a dummy zone (with a minimal dummy floor and space) so we could maintain all of the elements of the original model. Later, after I had created a second model to act as an EEM, I assigned the system to the affected zones and deleted all of the dummy elements.</DIV>
<DIV> </DIV>
<DIV>A GSHP systems should be of type PVVT. You'll need to assign a control zone right off the bat. Under "Heating," select Heat Pump as the heat source and Electric as the zone heat source. Then go back to the first screen, and select "Yes" under WL/GS Heat Pump. Now go back to Heating, under Cap Curves/Waste Ht, and for Total Capacity as f(temperature) select GSHP/WHP_Heat_Cap (under Ground Source Heat Pumps). The condenser type needs to be "water cooled".</DIV>
<DIV> </DIV>
<DIV>The three main screens where you'll enter information about your GSHP system are all located under Water Side: your circulation loop, loop pump, and ground source heat exchanger.</DIV>
<DIV> </DIV>
<DIV>I'm interested to see if anyone in the eQuest community can recommend a way to actually model a GSHP system as an EEM over an existing Air-side HVAC only model, to avoid needing to create a second model?</DIV>
<DIV> </DIV>
<DIV>I hope this post might be a help to someone.</DIV>
<DIV>-Taylor Sharpe<BR></DIV>
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<DIV class=gmail_quote>On Sun, Aug 22, 2010 at 6:59 AM, Carol Gardner <SPAN dir=ltr><<A href="mailto:cmg750@gmail.com" target=_blank>cmg750@gmail.com</A>></SPAN> wrote:<BR>
<BLOCKQUOTE style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class=gmail_quote>Taylor,<BR><BR>You can see much more information in the output file marked .BDL. Open it up in Word and scroll down to the systems area and you will see what data eQ is pulling from libraries, etc.<BR><BR>WRT the fact that you don't know how to assign systems to zones, you need to read a tutorial or two or to take a training or two. That's pretty basic and I'm going to let you have the satisfaction of finding the answer yourself as experience is the best teacher. The work flow of an eQ project usually starts by using either the Schematic or Detailed Design Wizard and when you used them to their maximum capacity go into the Detailed Data Edit mode to finish. You can always do more in the DD edit Mode. You cannot go backward from DD edit Mode into the Wizard without losing all the changes you made in the DD edit Mode.<BR><BR>After you study up awhile feel free to ask specific questions. I always recommend a peer review, which you will have to pay someone to do, especially if you are new to the field. There are many ways to slip up in eQ and not even know it.<BR><BR>Best,<BR><BR>Carol<BR><BR>
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<DIV class=h5>On Sat, Aug 21, 2010 at 4:00 PM, Taylor Sharpe <SPAN dir=ltr><<A href="mailto:newspectrum@gmail.com" target=_blank>newspectrum@gmail.com</A>></SPAN> wrote:<BR></DIV></DIV>
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<DIV class=h5>Hi everyone,
<DIV><BR></DIV>
<DIV>We have the goal of simulating a ground source heat exchanger as an EEM. eQuest's GSHP system looks useful and well-constructed, but we've just finished the grueling calibration process and find ourselves unable to create and apply the system in DDE mode. </DIV>
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<DIV>We can create the individual components, but we're running into two problems: the first is the issue of creating capacity curves, or finding eQuest's default ones (which would be ideal). The curves don't seem to be accessible through the DDE mode, as if eQuest generates them only if it's been told to through the wizard.</DIV>
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<DIV>I created a dummy model and reverted to the wizard, so that I could cross-compare inputs, but many of the values, curves etc. that the wizard generated can't be selected or created when I try to work through the process manually.</DIV>
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<DIV>I know that the first two steps are to create a circulation loop and a ground loop heat exchanger, but I'm at a loss as to what comes next, and how to assign the system to zones once I've completed it. Can it really be that the only way to accurately simulate the technology is to go through the wizard mode?</DIV>
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<DIV>Thanks for your help!</DIV>
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<DIV>-Taylor Sharpe<BR>Energy Modeler-in-Training<BR></DIV></FONT><BR></DIV></DIV>_______________________________________________<BR>Equest-users mailing list<BR><A href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org" target=_blank>http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</A><BR>To unsubscribe from this mailing list send a blank message to <A href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG" target=_blank>EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</A><BR><BR></BLOCKQUOTE></DIV><FONT color=#888888><BR><BR clear=all><BR>-- <BR>Carol Gardner PE<BR>
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