<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;color:rgb(39,78,19)"><p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-size:10pt;font-family:arial,sans-serif">David,<span></span></span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-size:10pt;font-family:arial,sans-serif">Thank you so much for
your guidance. This project is a mid-rise residential building with total off
66 units and retail space in the ground floor. </span><span style="font-family:arial,sans-serif;font-size:10pt">In addition to the VRF systems, th</span><span style="font-family:arial,sans-serif;font-size:10pt">e </span><span style="font-size:10pt;line-height:115%;font-family:arial,sans-serif">mechanical systems contain </span><span style="font-family:arial,sans-serif;font-size:10pt">a RTU that provides fresh
air of the units, and corridors, VAVS for the retail section and many UHTs in
heated only spaces. I am using eQUEST 3.65 build 7173 so I employed DOE-2.3 for
this project and selected VRF-HP-Resys performance curves for the VRF units.
After resolving the associated errors due to the change of DOE version, the
simulation was complete without errors but with too many cautions on “Convergence
failure: 30 DayCLs”. In addition, BEPU and BEPU reports were blank, showing no
results for the simulation. I have tried several times but the simulation
reports were the same. Therefore, I decided to go back to DOE-2.2 but use the related
performance curves of the condensing units within the DOE-2.3 library for the
VRF systems. This time the simulation results were very close to the one that I
got when I used Daikin performance curves for VRF units.</span></p><p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-size:10pt;font-family:arial,sans-serif"><br></span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-size:10pt;font-family:arial,sans-serif">Please let my know if
this approach is correct. In addition, per guidelines provided by Daikin, I
select PSZ units for VRF systems. Now that I use performance curves that are
provided for “Residential System”, should I change the system type to “Residential
System” as well?</span></p><p class="MsoNormal" style="margin-bottom:0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span style="font-size:10pt;font-family:arial,sans-serif"><br>
Thank you for your time,<br>
Morteza <span></span></span></p></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><img src="https://lh6.googleusercontent.com/Uuukta80GuFfvKouzA0mdSvUXqml7MtSwSiw-evuGMU=w147-h43-p-no"><br><div><br></div></div></div></div>
<br><div class="gmail_quote">On Fri, Apr 7, 2017 at 5:01 PM, David Griffin II <span dir="ltr"><<a href="mailto:DGriffin@archnexus.com" target="_blank">DGriffin@archnexus.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><a name="m_-4482492458399316105__MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Morteza,<u></u><u></u></span></a></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">Depending on the size of your VRF system and what other systems you are trying to model, you may consider employing DOE 2.3 which has a residential VRF system
built in. You can use the default curves for the system type rather than try and hunt down the curves from the manufacturer.<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">Let us know how it goes if you choose this route.<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">Thanks!<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="color:#1f497d"></span></p><table border="0" cellspacing="0" cellpadding="0" width="100%"><tbody><tr><td width="80" style="padding-right:13px" valign="top"><a href="http://www.archnexus.com" target="_blank"><img src="http://www.stationerycentral.com/SignatureImages10/ArchNexus-logo-80x99.png" border="0" width="80" height="99" alt="ARCH | NEXUS"></a></td><td width="1" valign="top" style="border-left:1px #009ad9 solid"> </td><td style="padding-left:9px"><table border="0" cellspacing="0" cellpadding="0" width="100%"><tbody><tr><td align="left" colspan="2"><span style="color:#52616e;font-family:'Verdana',sans-serif;font-size:11pt;font-weight:normal">DAVID W. GRIFFIN II</span></td></tr><tr><td style="padding-top:6px" align="left" colspan="2"><span style="color:#52616e;font-family:'Verdana',sans-serif;font-size:7.5pt">BEMP</span><span style="color:#52616e;font-family:'Verdana',sans-serif;font-size:7.5pt"><br>ENERGY ANALYST</span></td></tr><tr><td align="left" style="padding-top:6px;padding-bottom:6px" colspan="2"><span style="color:#52616e;font-family:'Verdana',sans-serif;font-size:7.5pt"> 2505 E Parleys Way<br>Salt Lake City, UT 84109 </span></td></tr><tr><td align="left" width="100%" style="padding-left:3px;white-space:nowrap"><span style="color:#52616e;font-family:'Verdana',sans-serif;font-size:7.5pt"><b>Office</b> <a href="tel:(801)%20924-5028" value="+18019245028" target="_blank">801.924.5028</a> </span></td></tr><tr><td><span style="color:#52616e;font-family:'Verdana',sans-serif;font-size:7.5pt"></span></td></tr><tr><td align="left" style="padding-top:6px;padding-bottom:0px;white-space:nowrap" colspan="2"><span style="color:#52616e;font-size:7.5pt;font-weight:normal;font-family:'Verdana',sans-serif"><a style="text-decoration:none;color:#52616e" href="http://www.archnexus.com" target="_blank"><font color="#52616E">archnexus.com</font></a></span></td></tr><tr><td align="left" style="padding-top:6px;padding-bottom:0px;white-space:nowrap" colspan="2"><a href="https://twitter.com/arch_nexus" target="_blank"><img src="http://www.stationerycentral.com/SignatureImages10/ArchNexus-tw-sharp-L-29x22.png" border="0" width="29" height="22" alt="Twitter"></a><a href="https://www.facebook.com/pages/Architectural-Nexus/179588705397563?ref=ts&fref=ts" target="_blank"><img src="http://www.stationerycentral.com/SignatureImages10/ArchNexus-fb-sharp-L-29x22.png" border="0" width="29" height="22" alt="Facebook"></a><a href="https://www.youtube.com/channel/UCYRPWKF-yp-AUiI8ia2XfKw?feature=mhee" target="_blank"><img src="http://www.stationerycentral.com/SignatureImages10/ArchNexus-yt-sharp-L-29x22.png" border="0" width="29" height="22" alt="Youtube"></a><a href="https://www.linkedin.com/company/architectural-nexus" target="_blank"><img src="http://www.stationerycentral.com/SignatureImages10/ArchNexus-li-sharp-L-29x22.png" border="0" width="29" height="22" alt="LinkedIn"></a></td></tr></tbody></table></td></tr></tbody></table><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u><u></u></span><p></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Morteza Kasmai via Equest-users [mailto:<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.<wbr>onebuilding.org</a>]
<br>
<b>Sent:</b> Friday, April 07, 2017 9:19 AM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.<wbr>onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Samsung VRF System<u></u><u></u></span></p><div><div class="h5">
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#274e13">Dear eQUEST experts,</span><span style="color:#274e13"><u></u><u></u></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial">
<span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#274e13">I am trying to model Samsung VRF unit in my LEED project. I have modeled Daikin VRF units in other projects, using the manufacturer’s performance curves and guidelines for modeling
these systems in eQUEST with no problem. However, it seems that the Samsung representative is not able to provide the performance curve of the condensing units. Is there any way to model this system without having the performance curves?</span><span style="color:#274e13"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#274e13">I truly appreciate your help,<br>
</span><span style="font-family:"Tahoma",sans-serif;color:#274e13">Morteza<u></u><u></u></span></p>
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