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<p class="MsoNormal"><span style="color:#1F497D">Neeraj,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">There are many adjustments you can make to address the performance of your VAV system in eQUEST. You didn’t describe how many unmet hours you have or what you have tried already. Unmet heating hours can result
from underheating, but also from overcooling. Depending on what you change in the model, you might end up increasing your heating energy, or you can end up reducing both cooling and heating energy. Here are a few things to try:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Enter a value for the system REHEAT-DELTA-T. Leaving this blank can result in thousands of unmet heating hours.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Set the system COOL-CONTROL to something other than CONSTANT, provided the system you are modeling has the controls capability. I have had success with WARMEST and RESET.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">If you change COOL-CONTROL to COLDEST or WARMEST, increase the zone THROTTLING-RANGE from the default 2°R (2°F). 4°-6° is recommended. You can start with 3° and increase by 0.5° to see how the unmet
hours change. If you are comparing two models or two system types, keep the same throttling range in both models to make it a fair comparison.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Adjust air flow rates, such as your system and/or zonal MIN-FLOW-RATIO.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Search the archives here: <a href="http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/">
http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/</a> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">You could always post your .inp and .pd2 files and someone might look at your model.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Bill<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><a href="mailto:wbishop@pathfinder-ea.com"><b><span style="font-size:10.0pt;font-family:"Franklin Gothic Medium","sans-serif";color:black;text-decoration:none"><img border="0" width="481" height="118" id="Picture_x0020_1" src="cid:image001.png@01CD17C3.1F2432E0"></span></b></a><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></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""> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Neeraj Arora<br>
<b>Sent:</b> Wednesday, April 11, 2012 3:12 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Removing unmet heating hours or the space heating consumption from the energy model<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dear friends,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am doing an energy model and getting few unmet hours in heating. The air side system type is a Variable Air Volume and electric heating at system as well as at zone level. The water side is water cooled chillers with VFD secondary pumping.
<o:p></o:p></p>
<p class="MsoNormal">If I change the system type from VAV to Reheat Fan system, the unmet hours are gone but the model shows huge space heating consumption, which is not acceptable as per the location of the building. The building is located in New Delhi (India).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have tried everything possible to either remove the unmet hours or the space heating consumption but one goes and the other one comes.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is there any way to remove unmet heating hours and the space heating consumption simultaneously? I have used New Delhi weather file.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Anyone please help me out to resolve the problem.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks in advance.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Neeraj Arora<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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