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<p class="MsoNormal"><span style="color:#1F497D">I’m not really sure what the LEED reviewers are expecting to see. I haven’t tried this technique for a LEED submission, so maybe other members could shed some light on this issue.<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">But, yes. The condenser units don’t explicitly show up in the model. If you want to see the condenser units explicitly shown, use the WSHP/PVVT approach, which shows the condenser units as the heat rejection
component, and the fan coils as the PVVT component. I believe this will give you more conservative energy usages because equest only allows for a single speed compressor.
<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">Matt Clough<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"><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""> Eleni Soulti [mailto:elenisoulti@co2engineering.eu]
<br>
<b>Sent:</b> Friday, July 06, 2012 2:01 AM<br>
<b>To:</b> Matt Clough<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> RE: [Equest-users] VRF in eQUEST<o:p></o:p></span></p>
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</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Matt,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Thank you very much for your answer. So, when modelling one PVVT for each room, the external VRF units don’t appear in the model at all if I understand correctly? My concern is that LEED will expect
to see in the model the four units that we actually have in the building.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">I see what you mean with the numbering system, but this only helps us, without actually being taken into consideration somehow in the model, doesn’t it? Thanks again.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Eleni Soulti<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<div>
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<p class="MsoNormal"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F">Oficina Sevilla</span><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ES" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F">Cartuja - Edificio Marie Curie</span><span lang="ES" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ES" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F">C/Leonardo da Vinci 18, Planta1 3ºB</span><span lang="ES" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F">41092 Sevilla | España</span><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F">T. (0034) 954460339 </span><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="ES" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F">Oficina Huelva.<br>
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21001 Huelva | España <br>
T. (0034) 647143558 </span><span lang="ES" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="ES" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F">w. </span><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F"><a href="http://www.co2engineering.eu/" target="_blank"><span lang="ES" style="color:#7F7F7F">www.co2engineering.eu</span></a></span><span lang="ES" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ES" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F">e. </span><span lang="ES" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray"> </span><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray"><a href="mailto:francisgn@co2engineering.eu" target="_blank"><span lang="ES" style="color:gray">elenisoulti@co2engineering.eu</span></a></span><span lang="EN-GB" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" 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""> Matt Clough [mailto:mclough@kme-inc.com]
<br>
<b>Sent:</b> 05 July 2012 13:36<br>
<b>To:</b> Eleni Soulti<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> RE: [Equest-users] VRF in eQUEST<o:p></o:p></span></p>
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</div>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Eleni,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">From what I understand, each PVVT system represents one of the fan coil units. When you go back through and make the hourly reports, the energy consumption from each zone is added together to represent the total
energy usage of the entire VRF system. Take note of the numbering system that is used in the presentation: 1-2, 1-3. The first number identifies the CU that the PVVT/FCU is connected to, and the second number is the FCU id. They create hourly reports
and go back to do some calculation with excel.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">As far as input values, I would guess that you could add existing data for the spaces, such as flow rate and temperature setpoints. You could also let it autosize the units. I’m not really sure what would be
best. </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Good Luck,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Matt Clough</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></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""> Eleni Soulti [<a href="mailto:elenisoulti@co2engineering.eu">mailto:elenisoulti@co2engineering.eu</a>]
<br>
<b>Sent:</b> Tuesday, July 03, 2012 4:07 PM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>;
<a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] VRF in eQUEST</span><o:p></o:p></p>
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</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">Dear all,</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">I am trying to model a VRF system as Packaged Variable Volume Variable Temperature system.
</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">My building has four external VRF units connected to terminal units for each space in the interior. According to the power point presentation on the subject, it should be modelled as PVVT with separate system for each
zone. In this case what values would you use? Would it be the same as my original model or is there a way to define values with different proportions based on the initial ones?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">Wouldn’t it make more sense to design 4 PVVT as many as the VRF I have? And in this case which is the zone controlling the system? If I ‘m not wrong, eQUEST only allows to choose one.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">And one more general question: eQUEST creates by default plenum for each space and HVAC systems with all zones. Would you remove these default HVAC systems together with the unconditioned spaces and plenums?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">Thank you very much.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">Best regards,</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">Eleni</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F">On behalf of</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F">Cartuja - Edificio Marie Curie</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F">C/Leonardo da Vinci 18, Planta1 3ºB</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F">41092 Sevilla | España</span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#CCEE00"> </span></b><o:p></o:p></p>
<p class="MsoNormal"><span lang="ES" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F">Oficina Huelva.<br>
Plaza Hermanos Costalero nº 2, 6º A <br>
21001 Huelva | España <br>
T. (0034) 647143558 </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="ES" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#222222"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="ES" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F">w. </span><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F"><a href="http://www.co2engineering.eu/" target="_blank"><span lang="ES" style="color:#7F7F7F">www.co2engineering.eu</span></a></span><o:p></o:p></p>
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