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<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Alex,</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">The interface will allow you to specify more than one ground heat exchanger, however the results presented for the second loop (as determined by the order of entry) cannot
be used. Only one may be simulated per alternative. In your results from an error scan, you should see a fatal error associated with multiple ground loops.
</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Eric Sturm</span><span style="font-size:11.0pt; font-family:"Calibri","sans-serif""></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Applications Engineer</span><span style="font-size:11.0pt; font-family:"Calibri","sans-serif""></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Trane Commercial Systems</span><span style="font-size:11.0pt; font-family:"Calibri","sans-serif""></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Ingersoll Rand</span><span style="font-size:11.0pt; font-family:"Calibri","sans-serif""></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">3600 Pammel Creek Rd</span><span style="font-size:11.0pt; font-family:"Calibri","sans-serif""></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">La Crosse, WI 54601</span><span style="font-size:11.0pt; font-family:"Calibri","sans-serif""></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Office: +1.608.787.3736</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Fax: +1.608.787.3005</span><span style="font-size:11.0pt; font-family:"Calibri","sans-serif""></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Email:
<a href="mailto:esturm@trane.com"><span style="color:windowtext">esturm@trane.com</span></a></span><span style="font-size:11.0pt; font-family:"Calibri","sans-serif""></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Website:
<u>www.trane.com</u></span><u><span style="font-size:11.0pt; font-family:"Calibri","sans-serif""></span></u></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt; font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt; font-family:"Tahoma","sans-serif""> trace-users-bounces@lists.onebuilding.org [mailto:trace-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>AChapin@sriregistrar.com<br>
<b>Sent:</b> Wednesday, November 28, 2012 3:41 PM<br>
<b>To:</b> trace-users@lists.onebuilding.org<br>
<b>Subject:</b> [Trace-users] Multiple Ground source Heatpump in one alternative</span></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Eric,</span>
<br>
<br>
<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">I am surprised to hear you say that TRACE will not allow two separate ground loops in a single file because if you create multiple cooling plants with ground loops, you are allowed to specify
different parameters for "TLoop Ent Bldg" under Plant Controls, Geothermal Loop. When you run the model, you even get different energy use results for each cooling plant (GSHP) when you have two identical rooms with one assigned to each cooling plant (since
the temperature of the ground loop is different based on TLoop Ent Bldg). This implies that there are two separate loops, otherwise the one loop would have two different entering temperatures simultaneously.</span>
<br>
<br>
<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Catalina, does that address the question that you asked?</span>
<br>
<br>
<b><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Alex N. Chapin,
<span style="color:green">LEED AP BD+C</span></span></b> <br>
<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Sustainability Program Engineer</span>
<br>
<br>
<b><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">SRI Quality System Registrar</span></b>
<br>
<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">300 Northpointe Circle, Suite 304</span>
<br>
<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Seven Fields, PA 16046</span>
<br>
<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">phone: 724.934.9000 x619; fax: 724.934.9145</span>
<br>
<span style="font-size:10.0pt; font-family:"Arial","sans-serif""><a href="mailto:AChapin@sriregistrar.com">AChapin@sriregistrar.com</a></span>
<br>
<br>
<tt><span style="font-size:10.0pt">Date: Tue, 27 Nov 2012 21:48:11 +0000</span></tt><span style="font-size:10.0pt; font-family:"Courier New""><br>
<tt>From: "Sturm, Eric" <<a href="mailto:esturm@trane.com">esturm@trane.com</a>></tt><br>
<tt>To: "Caballero, Catalina" <<a href="mailto:ccaballero@jalrw.com">ccaballero@jalrw.com</a>></tt><br>
<tt>Cc: "'trace-users@lists.onebuilding.org'"</tt><br>
<tt> <<a href="mailto:trace-users@lists.onebuilding.org">trace-users@lists.onebuilding.org</a>></tt><br>
<tt>Subject: Re: [Trace-users] Multiple Ground source Heatpump in one</tt><br>
<tt> alternative</tt><br>
<tt>Message-ID:</tt><br>
<tt> <<a href="mailto:B15E874B9BE11D42A67F232B539E6F9B275D48@012-BR1MPN1-011.mgdir.irco.com">B15E874B9BE11D42A67F232B539E6F9B275D48@012-BR1MPN1-011.mgdir.irco.com</a>></tt><br>
<tt> </tt><br>
<tt>Content-Type: text/plain; charset="us-ascii"</tt><br>
<br>
<tt>Catalina,</tt><br>
<br>
<tt>This is a complex scenario to model in TRACE 700 and I wanted to shed some light on what is possible and not possible.</tt><br>
<br>
<tt>The limitations you're finding are related to how system coils are assigned to equipment (plants), and ground heat exchangers. TRACE 700 can only model a single ground heat exchanger per alternative and system coils (e.g. cooling and heating coils) are
assigned to a plant, rather than an individual piece of equipment. In your scenario, you may have one or two ground loops but you'll only be able to model a single loop in the alternative. This limitation prevents you from modeling the systems independently.</tt><br>
<br>
<tt>If you create two ground source heat pump pieces of equipment, you'll still need to assign these to a single plant. Doing so does not allow you to independently operate each plant based upon system coil load because cooling and heating coils are assigned
to plants rather than equipment. The sequencing options will not help you in this instance.</tt><br>
<br>
<tt>To model this system, you'll need to make a ground source heat pump system as shown in the User's Manual. You can make a single cooling plant (water source heat pump equipment type) and modify the energy rate and ground loop information as you desire.
You may wish to use a composite energy rate the best represents all heat pumps on the ground loop(s).</tt><br>
<br>
<tt>I suspect that the information you received from C.D.S. is correct in that you can model two separate heat pump plants, but you cannot model two separate ground loops in a single file.</tt><br>
<br>
<tt>Regards,</tt><br>
<tt>Eric Sturm</tt><br>
<tt>Applications Engineer</tt><br>
<tt>Trane Commercial Systems</tt><br>
<tt>Ingersoll Rand</tt><br>
<tt>3600 Pammel Creek Rd</tt><br>
<tt>La Crosse, WI 54601</tt><br>
<br>
<tt>Office: +1.608.787.3736</tt><br>
<tt>Fax: +1.608.787.3005</tt><br>
<tt>Email: esturm@trane.com<</tt></span><a href="mailto:esturm@trane.com"><tt><span style="font-size:10.0pt">mailto:esturm@trane.com</span></tt></a><tt><span style="font-size:10.0pt">></span></tt><span style="font-size:10.0pt; font-family:"Courier New""><br>
<tt>Website: </tt></span><a href="www.trane.com"><tt><span style="font-size:10.0pt">www.trane.com</span></tt></a><span style="font-size:10.0pt; font-family:"Courier New""><br>
<br>
<tt>From: <a href="mailto:trace-users-bounces@lists.onebuilding.org">trace-users-bounces@lists.onebuilding.org</a> [</tt></span><a href="mailto:trace-users-bounces@lists.onebuilding.org"><tt><span style="font-size:10.0pt">mailto:trace-users-bounces@lists.onebuilding.org</span></tt></a><tt><span style="font-size:10.0pt">]
On Behalf Of Caballero, Catalina</span></tt><span style="font-size:10.0pt; font-family:"Courier New""><br>
<tt>Sent: Tuesday, November 27, 2012 2:57 PM</tt><br>
<tt>To: 'trace-users@lists.onebuilding.org'</tt><br>
<tt>Subject: [Trace-users] Multiple Ground source Heatpump in one alternative</tt><br>
<br>
<tt>Good afternoon,</tt><br>
<br>
<tt>I'm trying to find out a way to model 2 ground source heat pumps in an alternative. One of these systems serves an exhibition spaces, and the other one serves a mechanical room. When I call CDS some representatives say it's possible, others don't think
so, making it more confusing. Anybody has experience with this issue?</tt><br>
<br>
<tt>Regards,</tt><br>
<br>
<tt>Catalina Caballero, AIA. Assoc., LEED GA.</tt><br>
<tt>Johnson, Avedano, Lopez, Rodriguez & Walewski</tt><br>
<tt>Engineering Group, Inc.</tt><br>
<br>
<tt>2510 NW 97th Avenue, Suite 220, Miami, Florida 33172</tt><br>
<tt>Tel. (305) 594-0660 Ext. 217 Fax (305) 594-0907</tt><br>
<br>
<tt>Visit us online: </tt></span><a href="www.jalrw.com"><tt><span style="font-size:10.0pt">www.jalrw.com</span></tt></a><tt><span style="font-size:10.0pt"><</span></tt><a href="http://www.jalrw.com/"><tt><span style="font-size:10.0pt">http://www.jalrw.com/</span></tt></a><tt><span style="font-size:10.0pt">></span></tt></p>
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