Doesn't PVVT allow you to have supplemental gas heat for the backup? Using a furnace? I think I just did that. You may be able to create a schedule for it. I don't know about PVAV but you might be able to call it PVVT with out too much trouble.<br>
Try it and let us know. If it doesn't work do what Bill says to do.<br>Carol<br><br><div class="gmail_quote">On Tue, May 18, 2010 at 7:18 AM, Bishop, Bill <span dir="ltr"><<a href="mailto:wbishop@pathfinder-ea.com">wbishop@pathfinder-ea.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Demba,</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Here are two options that come to mind:</span></font></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"><span>1.)<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";"> </span></font></span></span></font><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Add an electric HP-SUPP-SOURCE. Convert the electric use to gas (by
hand calculation, not within eQUEST) and use the furnace AFUE to account for
inefficiency.</span></font></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"><span>2.)<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";"> </span></font></span></span></font><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Add baseboard heating of type FURNACE. Use OA TEMP control, create
a RESET-RATIO baseboard schedule and adjust the OA temperatures to minimize
daytime operation of the baseboards. You will need to create an hourly report to
see when the baseboards (furnaces) are coming on.</span></font></p>
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Regards,</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Bill</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
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<p class="MsoNormal"><b><font color="black" face="Franklin Gothic Medium Cond" size="2"><span style="font-size: 10pt; font-family: "Franklin Gothic Medium Cond"; color: black; font-weight: bold;">William Bishop, EIT, BEMP, LEED<sup>®</sup>
AP </span></font></b><b><font color="#006600" face="Franklin Gothic Medium Cond" size="2"><span style="font-size: 10pt; font-family: "Franklin Gothic Medium Cond"; color: rgb(0, 102, 0); font-weight: bold;">|</span></font></b><b><font color="black" face="Franklin Gothic Medium Cond" size="2"><span style="font-size: 10pt; font-family: "Franklin Gothic Medium Cond"; color: black; font-weight: bold;"> </span></font></b><b><font color="black" face="Franklin Gothic Medium Cond" size="2"><span style="font-size: 10pt; font-family: "Franklin Gothic Medium Cond"; color: black; font-weight: bold;">Pathfinder
Engineers & Architects LLP</span></font></b><b><font color="black" face="Franklin Gothic Medium Cond" size="2"><span style="font-size: 10pt; font-family: "Franklin Gothic Medium Cond"; color: black; font-weight: bold;"></span></font></b></p>
<p class="MsoNormal"><font color="black" face="Arial" size="1"><span style="font-size: 9pt; font-family: Arial; color: black;">Mechanical Engineer</span></font></p>
<p class="MsoNormal"><font color="black" face="Arial" size="1"><span style="font-size: 5pt; font-family: Arial; color: black;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="1"><span style="font-size: 9pt; font-family: Arial; color: navy;">134 South Fitzhugh Street</span></font><font color="navy" size="1"><span style="font-size: 9pt; color: navy;"><br>
</span></font><font color="navy" face="Arial" size="1"><span style="font-size: 9pt; font-family: Arial; color: navy;">Rochester</span></font><font color="navy" face="Arial" size="1"><span style="font-size: 9pt; font-family: Arial; color: navy;">, NY 14608</span></font><font color="navy" size="1"><span style="font-size: 9pt; color: navy;"><br>
</span></font><font color="navy" face="Arial" size="1"><span style="font-size: 9pt; font-family: Arial; color: navy;">T: (585) 325-6004 </span></font><font color="black" face="Arial" size="1"><span style="font-size: 9pt; font-family: Arial; color: black;">Ext. 114</span></font><font color="navy" size="1"><span style="font-size: 9pt; color: navy;"><br>
</span></font><font color="navy" face="Arial" size="1"><span style="font-size: 9pt; font-family: Arial; color: navy;">F: (585) 325-6005</span></font><font color="black" face="Arial" size="1"><span style="font-size: 9pt; font-family: Arial; color: black;"></span></font></p>
<p class="MsoNormal"><font color="black" face="Arial" size="1"><span style="font-size: 9pt; font-family: Arial; color: black;"><a href="mailto:wbishop@pathfinder-ea.com" target="_blank">wbishop@pathfinder-ea.com</a></span></font></p>
<p class="MsoNormal"><font color="black" face="Arial" size="1"><span style="font-size: 9pt; font-family: Arial; color: black;"><a href="http://www.pathfinder-ea.com" target="_blank">www.pathfinder-ea.com</a></span></font><font color="navy"><span style="color: navy;"></span></font></p>
<p class="MsoNormal"><font color="green" face="Webdings" size="5"><span style="font-size: 18pt; font-family: Webdings; color: green;">P</span></font><font color="green"><span style="color: green;"> </span></font><font color="green" size="1"><span style="font-size: 7.5pt; color: green;">May is National Bike
Month. Bike to Work Day May 21<sup>st</sup>.</span></font><font color="green"><span style="color: green;"></span></font></p>
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<div class="MsoNormal" style="text-align: center;" align="center"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">
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<p class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;">
<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>] <b><span style="font-weight: bold;">On Behalf Of </span></b>Demba Ndiaye<br>
<b><span style="font-weight: bold;">Sent:</span></b> Tuesday, May 18, 2010 8:29
AM<br>
<b><span style="font-weight: bold;">To:</span></b> Carol Gardner;
<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><div class="im"><br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [Equest-users]
ground-source heat pump with gas backup</div></span></font></p>
</div><div class="im">
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font color="#1f497d" face="Calibri" size="2"><span style="font-size: 11pt; font-family: Calibri; color: rgb(31, 73, 125);">Carol, </span></font></p>
<p class="MsoNormal"><font color="#1f497d" face="Calibri" size="2"><span style="font-size: 11pt; font-family: Calibri; color: rgb(31, 73, 125);"> </span></font></p>
<p class="MsoNormal"><font color="#1f497d" face="Calibri" size="2"><span style="font-size: 11pt; font-family: Calibri; color: rgb(31, 73, 125);">The building is a
school. Operating hours are basically 7am - 4pm. The furnace operates as a
backup only during the day, but at night is the only one operating to maintain
heating setback. </span></font></p>
<p class="MsoNormal"><font color="#1f497d" face="Calibri" size="2"><span style="font-size: 11pt; font-family: Calibri; color: rgb(31, 73, 125);"> </span></font></p>
<p class="MsoNormal"><font color="#1f497d" face="Calibri" size="2"><span style="font-size: 11pt; font-family: Calibri; color: rgb(31, 73, 125);">I have two system
types: one is a PVAV and one, a PVVT. </span></font></p>
<p class="MsoNormal"><font color="#1f497d" face="Calibri" size="2"><span style="font-size: 11pt; font-family: Calibri; color: rgb(31, 73, 125);"> </span></font></p>
<p class="MsoNormal"><font color="#1f497d" face="Calibri" size="2"><span style="font-size: 11pt; font-family: Calibri; color: rgb(31, 73, 125);">I can shut down the
pumps through a schedule for night-cycling, but cannot see how to get only a
furnace operating for night-cycling.</span></font></p>
<p class="MsoNormal"><font color="#1f497d" face="Calibri" size="2"><span style="font-size: 11pt; font-family: Calibri; color: rgb(31, 73, 125);"> </span></font></p>
<p class="MsoNormal"><font color="#1f497d" face="Calibri" size="2"><span style="font-size: 11pt; font-family: Calibri; color: rgb(31, 73, 125);">Demba.</span></font></p>
<p class="MsoNormal"><font color="#1f497d" face="Calibri" size="2"><span style="font-size: 11pt; font-family: Calibri; color: rgb(31, 73, 125);"> </span></font></p>
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<p class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;"> Carol Gardner
[mailto:<a href="mailto:cmg750@gmail.com" target="_blank">cmg750@gmail.com</a>] <br>
<b><span style="font-weight: bold;">Sent:</span></b> Monday, May 17, 2010 8:21 PM<br>
<b><span style="font-weight: bold;">To:</span></b> Demba Ndiaye<br>
<b><span style="font-weight: bold;">Cc:</span></b>
<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [Equest-users]
ground-source heat pump with gas backup</span></font></p>
</div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Hi Demba,<br>
<br>
What is the building type and operating schedule? Why the gas furnace as back
up to cycle on only at night?<br>
<br>
Carol</span></font></p>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">On Tue, May 18, 2010 at 12:21 AM, Demba Ndiaye <<a href="mailto:Demba.Ndiaye@setty.com" target="_blank">Demba.Ndiaye@setty.com</a>> wrote:</span></font></p>
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<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Folks, </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">I have a
ground-source heat pump that operates during the day. At night, the pumps are
shut off, and if the space needs heating to maintain the setback temperature, a
gas furnace kicks off. </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Said otherwise,
only the furnace operates to maintain setback.</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">How would you
model that?</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">_______________</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Demba NDIAYE</span></font></p>
</div>
</div>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><br>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><br>
<br clear="all">
<br>
-- <br>
Carol Gardner PE</span></font></p>
</div></div>
</div>
</blockquote></div><br><br clear="all"><br>-- <br>Carol Gardner PE<br>
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