<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Hi Attiq<div><br></div><div>I understand how the heat loss is reduced. But in real world, the space is conditioned to 24 deg c inside while outside is more than 40 deg c. Hence there would always be a heat gain from outside and if the glass- u value is reduced then cooling consumption should reduce. Otherwise with both wall and glass u-value reduction there should be increase in cooling consumption. Which means that envelope insulation is not good strategy.</div><div><br></div><div>Or is it that the simulation calculations are based in natural heat loss or gain first and based on the resultant load, the building cooling energy is calculated.</div><div><br></div><div>Your views are welcome on the above.</div><div><br></div><div>Regards</div><div><br></div><div>Akshay<br><br><div id="AppleMailSignature">Sent from my iPhone</div><div><br>On 4 Nov 2017, at 02:01, attiq.urrahman <<a href="mailto:aur@bepc.biz">aur@bepc.biz</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="Generator" content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Akshay,<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">You are not making a mistake. The electric consumption for cooling will be increasing as the heat loss is reduced from the building. Check the cooling consumption in the output file.<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Attiq<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></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""> akshay gupta [<a href="mailto:akshaykg@gmail.com">mailto:akshaykg@gmail.com</a>] <br><b>Sent:</b> Friday, November 03, 2017 8:38 AM<br><b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br><b>Subject:</b> [Bldg-sim] eQuest - Energy consumption increasing on reducing Glass U-Value<o:p></o:p></span></p><p class="MsoNormal"><o:p> </o:p></p><div><p class="MsoNormal">Hi There<o:p></o:p></p><div><p class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal">I am facing an issue in eQuest in almost all simulation models for most hot and composite indian climates. Whenever we reduce U-value of glass in model, from Single Glazing U-Value of 1 Btu/hr Sqft F to 0.32 Btu/hr Sqft F (or any other U-value lower than 1), we see an increase in energy consumption.<o:p></o:p></p></div><div><p class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal">Can someone point out principal mistake that may be making in the model.<o:p></o:p></p></div><div><p class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal">Thanks in advance.<o:p></o:p></p></div><div><p class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal">Regards<o:p></o:p></p></div><div><p class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal">Akshay Gupta <o:p></o:p></p></div></div></div></div></blockquote></div></body></html>