I agree with both, Jeremiah and Christian. In my IES<VE> experience, I hhave had the same results by increasing insulation in exterior walls and roof, without any changes on internal gains. And my conclusion was, while increasing insulation, heat from internal gains cant "escape through the walls", so cooling equipment have to do his job whatever is happening outiside with dry bulb temperature.<br>
<br>Hope this helps.<br clear="all"><b><br><br>Cristian Jara Toro</b><br>Ingeniero Acústico<br><br>Cel: 6 207 8566<br><br><br>
<br><br><div class="gmail_quote">On Mon, Jun 11, 2012 at 8:43 AM, Christian Kaltreider <span dir="ltr"><<a href="mailto:ckaltreider@sudassociates.com" target="_blank">ckaltreider@sudassociates.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">Hi Dan,<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">This is a common result. You may want to search the archives, as this has been discussed in depth before.<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">Many buildings, particularly non-residential buildings, are ‘internal loads dominant’ rather than ‘envelope dominant’. This means that the majority of the cooling energy is spent removing heat from lighting, plug loads, people and perhaps solar gains. None of these things are dependent on outside temperature. So in an internal loads dominant building, there can be many hours out of the year in which the building is in cooling mode while the outside temperature is lower than the inside temperature. During these hours, heat transfer through the walls (from inside to outside) and infiltration are beneficial from a cooling standpoint. They act as a sort of uncontrolled economizer, reducing the amount of cooling required by the mechanical system. Increasing insulation reduces this beneficial effect.<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 hope this helps,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Christian<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"><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>Daniel Wright<br>
<b>Sent:</b> Monday, June 11, 2012 1:03 AM<br><b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br><b>Subject:</b> [Equest-users] Increased Energy for Cooling with Increasing Insulation and Decreasing Infiltration<u></u><u></u></span></p>
<div><div><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><span>Hello all,<br><br>I am a relatively new eQuest user and am encountering some non-intuitive results.<br><br>If I make an eQuest model for a default building using just the default values for everything, and then use the Energy Efficiency Measurement Wizard to increase the insulation (roof or wall) or decrease the infiltration, I see the annual energy used for heating decrease in both cases (which I would expect), and the cooling energy increase in both cases (which I wouldn't expect). I've tried this for two of the default building types (Two story office building and Mutifamily low rise) and two different climates (LA and NYC), and get the same results. I've also seen the same behavior in other building models that I've created that differ in many respects to these default cases.<br>
<br>Can someone please explain how this is possible?<br><br>Dan</span><u></u><u></u></p></div></div></div></div><br>_______________________________________________<br>
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