What Bill says is true, you are to only have one system per HVAC zone. I have never taken that to mean, however, that you might not have multiple spaces/rooms on one zone nor have I received that feedback from the developers. True, eQUEST insists on providing a zone name for each specified space, but you can gather the spaces/zones in each HVAC zone and cause them to be served by one PSZ or other system. Then you have to determine what your control zone is. After you have done that you go into your zone spreadsheet and put your heating temp schedules and cooling temp schedules in your control zone, which is where your thermostat is, and say they are undefined in the other zones. This should take care of the discomfort hours provided you carefully selected your control zone. This should not cause the other spaces to have inadequate heating or cooling since the control zone, as I understand it, has the highest loads of all the spaces and if it's satisfied the other spaces are satisfied.<br>
<br>That is my understanding, anyway, and I will accept any/all feedback. Especially from a BEMP!!<br><br>Carol<br><br><div class="gmail_quote">On Wed, Apr 7, 2010 at 6:39 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;">
<div link="blue" vlink="blue" lang="EN-US">
<div>
<p class="MsoNormal"><span><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Sambhav</span></font></span><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;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Are you modeling the baseline according to
Appendix G? If so, and you are using PSZ, you should have one system per zone.
If you are already modeling one system per zone you should not be getting high
unmet hours if you let eQUEST do the <span>autosizing</span>.</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;">If you are trying to model a PSZ with
multiple zones assigned to it, you can do a few things to reduce the unmet
hours. As Carol and Rob suggest, you can remove the heating and cooling
schedules to unconditioned zones. You should not do this for conditioned zones
(zones that you want to keep within a certain temperature range) because you
will be letting the temperatures float. Your unmet hours will go away but the
virtual people in those zones will be calling their virtual landlords
complaining about being too hot or too cold.</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;">To reduce unmet hours when multiple zones
are assigned to a PSZ, try the following:</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;">change the control zone (try assigning to the zone with most unmet
hours first)</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;">increase/decrease people/lighting/misc loads in the trouble zones
(and copy the values to the proposed model to keep them identical)</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>3.)<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;">change some interior walls to “air walls” (and copy
into the proposed model)</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>4.)<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;">increase the supply air flow rate to individual zones, especially
if they are <span>undercooled</span></span></font></p><div class="im">
<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;">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>
<div>
<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;">Please strive to live
sustainably.</span></font><font color="green"><span style="color: green;"></span></font></p>
</div>
</div><div>
<div class="MsoNormal" style="text-align: center;" align="center"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">
<hr width="100%" align="center" size="2">
</span></font></div>
<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:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>] <b><span style="font-weight: bold;">On Behalf Of </span></b>Carol Gardner<br>
<b><span style="font-weight: bold;">Sent:</span></b> Wednesday, April 07, 2010
2:32 AM<br>
<b><span style="font-weight: bold;">To:</span></b> Rob Hudson<br>
<b><span style="font-weight: bold;">Cc:</span></b> <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [Bldg-sim] Discomfort
hrs</span></font></p>
</div><div><div></div><div class="h5">
<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;">Yes. Only put the heating
temp schedules and cooling temp schedules in the zone you have selected as the
Control Zone. If you use the Spreadsheet option you will be able to do this
easily. Use the drop down menu and select Undefined for all other zones. <br>
<br>
Carol</span></font></p>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">On Tue, Apr 6, 2010 at 9:18 AM, Rob Hudson <<a href="mailto:rdh4176@gmail.com" target="_blank">rdh4176@gmail.com</a>> wrote:</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">If there are more than one zone assigned to the PZS, then remove the
thermostats to the extra zones. This happened to me when i attached an
unconditioned plenum space to a PZS space.</span></font></p>
<div>
<div>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">On Tue, Apr 6, 2010 at 10:52 AM, Vikram Sami <<a href="mailto:vssami@yahoo.com" target="_blank">vssami@yahoo.com</a>> wrote:</span></font></p>
<table border="0" cellpadding="0" cellspacing="0">
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Have you tried cycling your fans? If you'r doing
this for ASHRAE compliance you need to do this anyway. <br>
<br>
--- On <b><span style="font-weight: bold;">Tue, 4/6/10, sambhav tiwari <i><span style="font-style: italic;"><<a href="mailto:tiwari.sambhav@gmail.com" target="_blank">tiwari.sambhav@gmail.com</a>></span></i></span></b> wrote:</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><br>
From: sambhav tiwari <<a href="mailto:tiwari.sambhav@gmail.com" target="_blank">tiwari.sambhav@gmail.com</a>><br>
Subject: [Bldg-sim] Discomfort hrs<br>
To: <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
Date: Tuesday, April 6, 2010, 2:33 AM</span></font></p>
<div>
<div>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Hi All,<br>
In one of project my
basline building was having packaged syngle zone system but after running i
am getting lot of unmet hours for PSZ system for each zone almost 450 hrs for
basline.<br>
<br>
Can any suggest some solution.<br>
<br>
Thanks<br>
Sambhav.</span></font></p>
</div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
</div>
</div>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">-----Inline Attachment
Follows-----</span></font></p>
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<p class="MsoNormal" style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">-- <br>
<font color="#888888"><span style="color: rgb(136, 136, 136);">Rob Hudson<br>
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