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<p class="MsoNormal"><span style="color:#1F497D">I am in a similar situation and wanted to contribute to the discussion.<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">Of the two approaches proposed by the BSUG (wshp vs. air cooled), which is the most accurate? Which is more conservative? Does one seem to be preferred over the other?
<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">I like the WSHP approach because the way the systems are separated seems most like the way a vrv is actually assembled. The condenser water loop represents the exchange between the rooftop condenser and the
refrigerant branch selector. The pvvt systems represent the fan coils for each zone. At least, I think I’m understanding this correctly. I like that I am able to put group the fan coil units as if they are connected to the same condenser, but I don’t really
know that much and wonder if this really matters as far as a simulation is concerned.
<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">From the literature, it seems that the advantage of using the air cooled condenser is the access to the variable speed compressor (although I have been able to select that option in the DDE). What are some of
the other advantages of using the air-cooled condenser?<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""> Alea German [mailto:agerman@davisenergy.com]
<br>
<b>Sent:</b> Wednesday, June 27, 2012 3:19 PM<br>
<b>To:</b> Eleni Soulti; equest-users@lists.onebuilding.org; bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] VRF system in eQUEST<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Hi Eleni,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">There are a resource that has been put together by modelers at the Energy Trust of Oregon on a work-around for VRF systems in eQUEST, see attached. Yes, the method is to use PVVT system types. If heat recovery
is available there is a post-processing step with the hourly data to identify when simultaneous loads occur.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Alea<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"><i><span style="font-family:"Times New Roman","serif";color:#1F497D">____________<o:p></o:p></span></i></p>
<p class="MsoNormal"><b><i><span style="font-family:"Times New Roman","serif";color:#1F497D">Alea German<o:p></o:p></span></i></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman","serif";color:#1F497D">Davis Energy Group<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman","serif";color:#1F497D"><a href="mailto:agerman@davisenergy.com">agerman@davisenergy.com</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman","serif";color:#1F497D">ph: 530-753-1100 x30<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman","serif";color:#1F497D">123 C Street<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman","serif";color:#1F497D">Davis, CA 95616<o:p></o:p></span></p>
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</span></b><b><span style="font-size:7.0pt;font-family:"Century Gothic","sans-serif";color:green;letter-spacing:1.0pt">Please consider the environment before printing this email</span></b><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""> Eleni Soulti [mailto:elenisoulti@co2engineering.eu]
<br>
<b>Sent:</b> Tuesday, June 26, 2012 11:25 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org; bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] VRF system in eQUEST<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB">Dear all, <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">I am new to eQUEST and trying to model a VRF system. There is no such option, so I think some people model it as PVVT. Any suggestions or resources on that? Thank you very much.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Eleni Soulti<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F">On behalf of</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:8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F"> </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"><b><span style="font-size:14.0pt;font-family:"Snap ITC";color:#7F7F7F">C</span></b><b><span style="font-size:14.0pt;font-family:"Snap ITC";color:#E1FF2D">O</span></b><b><span style="font-size:6.0pt;font-family:"Snap ITC";color:#7F7F7F">2</span></b><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="EN-GB" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#7F7F7F">Engineering</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="EN-GB" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F"> </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="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) 679883055 </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:#222222"> </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"><b><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#CCEE00">London Office</span></b><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"><b><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#CCEE00">17, Bishops Close</span></b><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"><b><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#CCEE00">E17 9RP London | UK</span></b><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"><b><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#CCEE00">T. (0044) 7969235926 </span></b><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"><b><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#CCEE00"> </span></b><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">Oficina Huelva.<br>
Plaza Hermanos Costalero nº 2, 6º A <br>
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>
<p class="MsoNormal"><span lang="ES" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#222222"> </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">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">francisgn@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>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
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