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<div class="moz-cite-prefix">Have you considered bundling the zones
into one DX zone combining the loads and then using the AHRI SEER
and EER for the entire bundle? That seems pretty simple to me. <br>
<br>
<br>
<pre class="moz-signature" cols="72">Robert Wichert P.Eng. LEED AP BD&C
+1 916 966 9060
FAX +1 916 966 9068
===============================================
</pre>
On 6/28/2012 7:13 AM, Matt Clough wrote:<br>
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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>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0in 0in 0in">
<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 [<a class="moz-txt-link-freetext" href="mailto:agerman@davisenergy.com">mailto:agerman@davisenergy.com</a>]
<br>
<b>Sent:</b> Wednesday, June 27, 2012 3:19 PM<br>
<b>To:</b> Eleni Soulti;
<a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>;
<a class="moz-txt-link-abbreviated" href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] VRF system in eQUEST<o:p></o:p></span></p>
</div>
</div>
<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>
<div>
<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
moz-do-not-send="true"
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
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<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0in 0in 0in">
<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 class="moz-txt-link-freetext" href="mailto:elenisoulti@co2engineering.eu">mailto:elenisoulti@co2engineering.eu</a>]
<br>
<b>Sent:</b> Tuesday, June 26, 2012 11:25 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>;
<a class="moz-txt-link-abbreviated" href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] VRF system in eQUEST<o:p></o:p></span></p>
</div>
</div>
<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
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
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"> </span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="EN-GB"><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
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
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"
lang="EN-GB">Engineering</span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F"
lang="EN-GB"> </span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F"
lang="EN-GB">Oficina Sevilla</span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F"
lang="ES">Cartuja - Edificio Marie Curie</span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="ES"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F"
lang="ES">C/Leonardo da Vinci 18, Planta1 3ºB</span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="ES"><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
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="EN-GB"><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
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#222222"> </span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="EN-GB"><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
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="EN-GB"><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
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="EN-GB"><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
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="EN-GB"><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
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="EN-GB"><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
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F"
lang="ES">Oficina Huelva.<br>
Plaza Hermanos Costalero nº 2, 6º A <br>
21001 Huelva | España <br>
T. (0034) 647143558 </span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="ES"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#222222"
lang="ES"> </span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="ES"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F"
lang="ES">w. </span><span
style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F"><a
moz-do-not-send="true"
href="http://www.co2engineering.eu/" target="_blank"><span
style="color:#7F7F7F" lang="ES">www.co2engineering.eu</span></a></span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="ES"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#7F7F7F"
lang="ES">e. </span><span
style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray"
lang="ES"> </span><span
style="font-size:7.5pt;font-family:"Arial","sans-serif";color:gray"><a
moz-do-not-send="true"
href="mailto:francisgn@co2engineering.eu" target="_blank"><span
style="color:gray" lang="ES">francisgn@co2engineering.eu</span></a></span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"
lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
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