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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hello Matt,<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">It sounds like you are converting it to a PVVT system, have you looked into the eQUEST definitions for that unit type?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D"><br>
</span><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Byron D. Burns, EIT, BEMP</span></b><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D">
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</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#666666">Energy Analyst/ Modeler</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D">
<br>
<br>
<b>H&A Architects & Engineers</b> | <a href="http://www.ha-inc.com"><span style="color:#006C67">www.ha-inc.com</span></a>
<br>
<b>d:</b> (804) 420-1622 <b>p:</b> (804) 285-4171 <b>f:</b> (804) 217-8520 <br>
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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>Matt Larson<br>
<b>Sent:</b> Tuesday, February 18, 2014 5:24 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Variable Volume Help Needed!<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">I am modeling a building with an existing single zone 4-pipe chilled and hot water air handler unit that is currently constant volume but being converted to constant volume.
The unit feeds many spaces through a single duct. I modeled the system as a single zone with heat (SZRH) system and tried to add in a variable speed drive and lower the minimum flow ratio, but can’t get the fan speed to reduce when not needing 100% flow.
I also tried modeling the system as a variable volume system (VAVS) and the airflow ramps down but then the program adds a VAV box for each zone, which isn’t what is occurring. I am trying to control only to the worst case zone, as will be the installed case.
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Which system type should I be using for modeling this system, and how do I get it to model as noted above?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">I appreciate any help! Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><strong><span style="font-family:"GoudyOlSt BT";color:#585858">Matt Larson</span></strong><span style="font-size:10.0pt;font-family:"GoudyOlSt BT";color:#585858">, P.E., QCxP, LEED AP</span><o:p></o:p></p>
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