Paul and the rest of the user group,<div><br></div><div>The attached presentation was a great tool to both confirm and improve our approach for modeling VRF. I do have a follow-up question/problem that arose during the excel work (Slides 33 and 34 of the presentation). </div>
<div><br></div><div><u>Question:</u> Has anyone ever followed this approach and found out that the results from the hourly report are significantly different than the "monthly and annual energy consumption by enduse" reports that eQuest generates?</div>
<div><br></div><div><u>Step-by-step explanation of my process:</u></div><div>I created an hourly report exactly as in the presentation with the electric input to both heat and cool for every system in the facility along with an hourly report for the building as a whole. When I add up the heating energy and cooling energy of the individual systems, it equals the heating and cooling energy for the whole facility, so far so good.</div>
<div><br></div><div>Next, we looked at this heating and cooling energy and compared it to the "monthly and annual energy consumption by enduse" report that eQuest spits out. These numbers were not in agreement. For example, according to the hourly reports, the electricity used for space heating is 18,615 kWh while the space heating electricity in the "monthly energy consumption by enduse" report is 10,930 kWh. Big difference. </div>
<div><br></div><div>In some modeling programs (cough, Trace), I've seen heat pumps output the combination of their energy in either space heating or space cooling and not differentiate (which appears to be happening in eQuest as our space cooling energy is going up in the winter with the VRF system... and the building is definitely in a heating-dominated climate and has little internal space). The combination of the hourly report heating and cooling energy was 74,224 kWh and according to the "monthly energy consumption by enduse" report, the combination is 64,330 kWh. </div>
<div><br></div><div>I tried adding in the "HP Supp" energy and some other uses from the "monthly energy consumption by enduse" report to no avail. I've had another eQuest user check my excel calculations and my hourly reports and they seem to be in good working order. </div>
<div><br></div><div>Any guesses, suggestions, strong reactions?</div><div><br></div><div><br></div><div><br></div><div><br><br><div class="gmail_quote">On Tue, Oct 5, 2010 at 9:39 AM, Paul Diglio <span dir="ltr"><<a href="mailto:paul.diglio@sbcglobal.net">paul.diglio@sbcglobal.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div><div style="font-family:times new roman,new york,times,serif;font-size:10pt"><div>Gary:<br><br>Please find attached file.<br>
<br>Paul Diglio<br></div><div style="font-family:times new roman,new york,times,serif;font-size:10pt"><br><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><font face="Tahoma" size="2"><hr size="1">
<b><span style="font-weight:bold">From:</span></b> "<a href="mailto:Gary.Schrader@buildings.schneider-electric.com" target="_blank">Gary.Schrader@buildings.schneider-electric.com</a>" <<a href="mailto:Gary.Schrader@buildings.schneider-electric.com" target="_blank">Gary.Schrader@buildings.schneider-electric.com</a>><div class="im">
<br><b><span style="font-weight:bold">To:</span></b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br></div><b><span style="font-weight:bold">Sent:</span></b> Tue, October 5, 2010 9:06:28 AM<div class="im">
<br><b><span style="font-weight:bold">Subject:</span></b> [Equest-users] VRF/VRV PowerPoint on Modeling<br></div></font><div><div></div><div class="h5"><br>
<div>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10pt;font-family:Arial">All,</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10pt;font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10pt;font-family:Arial">At one time I recall seeing a PowerPoint presentation posted
to the ListServ about how to model VRV/VRF in eQuest. It took you through each
of the individual steps necessary to create a system.</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10pt;font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10pt;font-family:Arial">In searching the archives, I believe that this file was
scrubbed. Does anybody have a copy of it to repost? My understanding is that it
was developed by a firm out on the west coast, perhaps
Oregon .</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10pt;font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10pt;font-family:Arial">Thanks,</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10pt;font-family:Arial">Gary</span></font></p>
<p class="MsoNormal" style="margin-bottom:12pt"><font face="Arial" size="1"><span style="font-size:8.5pt;font-family:Arial"><br>
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<p><b><font face="Arial" size="1"><span style="font-size:8.5pt;font-family:Arial;font-weight:bold">Gary Schrader</span></font></b><font face="Arial" size="1"><span style="font-size:8.5pt;font-family:Arial"> | <b><font color="green"><span style="color:green;font-weight:bold">Schneider Electric </span></font></b>|
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