Hi Beka,<br><br>If you use a Variable Volume (VAV) system to model a Constant Volume (CV) system, you will really create problems for yourself. You state, and your system diagram confirms, that you have a constant volume fan and zone dampers, no reheat. I would probably use the PSZ system as the path of least resistance. <br>
<br>With PSZ you have to use a Control Zone, which is like the zone where the thermostat is, so try to use a system per zone wherever possible. If you have multiple thermal zones served by the same Control Zone the hours outside the throttling range can be tricky. Another trick when you don't want reheat to make sure your main heating coil is activated by using Heat-Set-T. You can click on it and read the online help.<br>
<br>Best,<br><br>Carol Gardner PE<br><br><div class="gmail_quote">On Tue, Jun 14, 2011 at 8:08 AM, Shea, Rebecca <span dir="ltr"><<a href="mailto:rshea@noresco.com">rshea@noresco.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">I am modeling a bypass system with a constant volume fan and zone dampers (no reheat) in the space. This seems like it would fall under the CBVAV system, except that my units have DX coils instead of CHW. eQuest will not allow DX instead of CHW, so I’m wondering at a way to approximate this. Set the chiller performance curve to DX and assign the CHW pump energy to another, non-tariffed, meter? Use a PVVT system instead?</p>
<p class="MsoNormal"> </p><p class="MsoNormal">Any help is appreciated.</p><p class="MsoNormal"> </p><p class="MsoNormal">-Beka</p><p class="MsoNormal"> </p><p class="MsoNormal" style="margin-bottom:12.0pt"> </p><p class="MsoNormal">
<span style="font-size:7.5pt">______________________________________________________________________________________________</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> <br>
</span><b><span style="font-size:10.0pt;font-family:"Garamond","serif"">Rebecca Shea</span></b><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> <br></span><b><span style="font-size:10.0pt;font-family:"Garamond","serif"">Energy Engineer</span></b><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> </span></p>
<p class="MsoNormal"><b><i><span style="font-size:10.0pt;font-family:"Garamond","serif";color:#333333">NORESCO</span></i> </b> </p><p class="MsoNormal"> </p></div></div><br>_______________________________________________<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Carol Gardner PE<br>
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