Looking at the LS-A and LS-D reports, you seem to have a reasonable change in envelope loads for the glass changes. That leaves the systems as the probable culprit. You are using a PMZS for each zone with heat control constant at 115F and cool control reset from 65 to 56F. With this control, your envelope loads are only 3% of the total systems loads from SS-D. A lot of energy is wasted blending the hot deck and cold deck to maintain the zone temp. <br>
<br><div class="gmail_quote">On Thu, Aug 23, 2012 at 8:46 AM, Sami, Vikram <span dir="ltr"><<a href="mailto:Vikram.Sami@perkinswill.com" target="_blank">Vikram.Sami@perkinswill.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div link="blue" vlink="purple" lang="EN-US"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I didn’t see any changes in the envelope between the 2 inp files you sent me. However the first file (Rindge-1) seemed to have a California weather file while the second one had Boston. When I switched them both to Boston – the numbers were almost identical. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I don’t think you have modeled your skin correctly. <u></u><u></u></span></p>
<div class="im"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal" style="text-autospace:none"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#dcaa2c"><u></u> <u></u></span></b></p><p class="MsoNormal" style="text-autospace:none">
<b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray">Vikram Sami</span></b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray">, LEED AP BD+C<u></u><u></u></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray">Sustainable Design Analyst<u></u><u></u></span></p><p class="MsoNormal" style="text-autospace:none">
<span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray">1315 Peachtree St. NE, Atlanta, GA 30309<u></u><u></u></span></p><p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray">t: <a href="tel:404-443-7462" value="+14044437462" target="_blank">404-443-7462</a> f: </span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray" lang="ES"><a href="tel:404.892.5823" value="+14048925823" target="_blank">404.892.5823</a> </span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray"> e: <a href="mailto:vikram.sami@perkinswill.com" target="_blank">vikram.sami@perkinswill.com</a> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><a href="http://www.perkinswill.com/" target="_blank"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray;text-decoration:none">www.perkinswill.com</span></a></span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray"><u></u><u></u></span></p>
<p class="MsoNormal" style="margin-bottom:3.0pt;text-autospace:none"><b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray">Perkins+Will.</span></b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray"> </span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#add425">Ideas + buildings that honor the broader goals of society</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:green"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
</div><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""> <a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Ron Pecarina<br>
<b>Sent:</b> Wednesday, August 22, 2012 4:44 PM<br><b>To:</b> Lee Chorney</span></p><div class="im"><br><b>Cc:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Huge envelope changes having small affect on energy savings<u></u><u></u></div><p></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal" style="margin-bottom:12.0pt">From what I see from these input files, the zone AC/Hr went from 0.2 to 0.8. I did not note a change in any R-value from 4 to 20. The increased ventilation load is the likely culprit.<u></u><u></u></p>
<div><div class="h5"><div><p class="MsoNormal">On Wed, Aug 22, 2012 at 1:42 PM, Lee Chorney <<a href="mailto:leec@alliedconsulting.net" target="_blank">leec@alliedconsulting.net</a>> wrote:<u></u><u></u></p><p class="MsoNormal">
Hi Guys,<br><br>Here all the .inp files. 1.inp is the base and 2.inp is the proposed.<br><br>Thank you,<br><br>Lee<u></u><u></u></p><div><div><p class="MsoNormal" style="margin-bottom:12.0pt"><u></u> <u></u></p><div><p class="MsoNormal">
On Wed, Aug 22, 2012 at 12:48 PM, Lee Chorney <<a href="mailto:leec@alliedconsulting.net" target="_blank">leec@alliedconsulting.net</a>> wrote:<u></u><u></u></p><p class="MsoNormal">Hi All,<br><br><br>I recently did a model where I had the same system in both base and proposed but I changed the R-Value from 4 (base) to 20 (proposed). I also changed the window U-value from .80 (base) to .35 (proposed). After I did the run, I saw only a 5% savings between the heating and cooling use in the model. When I looked at the loads I saw the base had twice as much cooling and heating load than the proposed. Does any know why the energy savings would only be 5% when you have a huge difference between the cooling and heating loads?<br>
<br>Thanks,<br><br>Lee<u></u><u></u></p></div><p class="MsoNormal"><u></u> <u></u></p></div></div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>_______________________________________________<br>Equest-users mailing list<br>
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</div><p class="MsoNormal"><br><br clear="all"><br>-- <br>Ron Pecarina, PE, CEM, LEED-AP BD&C<br>Energy and Sustainable Design Consultants, Inc.<br>1128 Noblewood Drive<br>Billings, MT 59101<br><a href="tel:406-208-0227" value="+14062080227" target="_blank">406-208-0227</a><u></u><u></u></p>
</div></div></div></div></blockquote></div><br><br clear="all"><br>-- <br>Ron Pecarina, PE, CEM, LEED-AP BD&C<br>Energy and Sustainable Design Consultants, Inc.<br>1128 Noblewood Drive<br>Billings, MT 59101<br>406-208-0227<br>