Sorry I accidentally hit the send button.<br><br>I was saying, my take on modeling systems that Appendix G and the rest of Standard 90 don't supply specific requirements for is to make them reasonably inefficient. I say reasonably because it has to be within reason, so that you can't be accused of gaming the system. In this case you have further justification for using the modulating baseline as you truly don't have any information about staging, <br>
<br>Cheers,<br><br>Carol<br><br><div class="gmail_quote">On Wed, Mar 30, 2011 at 5:53 PM, Carol Gardner <span dir="ltr"><<a href="mailto:cmg750@gmail.com">cmg750@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hi Kathryn,<br><br>Thanks for sharing your solution to the Georgia project. It sounds like a really good idea, simple yet effective. It's funny I don't think I would have thought of using 2 DOAS units, but why not?<br>
<br>WRT to the furnace. My ta<br><br><div class="gmail_quote"><div><div></div><div class="h5">On Wed, Mar 30, 2011 at 1:59 PM, Kathryn Kerns <span dir="ltr"><<a href="mailto:kathryn.kerns@bceengineers.com" target="_blank">kathryn.kerns@bceengineers.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div></div><div class="h5">
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial">Everyone, I may have asked this before, but has anybody run
across a section of ASHRAE 90.1 or LEED describing the operation of a baseline
furnace in a PSZ unit? Do we assume the heating modulates or does it stage? And
if it stages, how many stages? I have been modeling baseline furnace heating as
modulating since that is what naturally appears in eQuest, but I wonder. I know
in reality that a lot of small furnace heaters cycle to maintain space heat. </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial">Also, I promised I would share results of my struggle to model
dehumidification for a project in Georgia. I was sort of successful,
I think. What I ended up doing was attaching 2 DOAS in series. The first DOAS
had a cooling only heat pump and the second unit had heating only heat pump. The
first unit handled the outside air and passed space/return air to the second
DOAS. The second unit supplied space/return air to the terminal units.
This way I got to define set points for the first DOAS cooling supply
temperature (space/return temperature) and the second DOAS heating supply (space/return
temperature). The amount of energy consumed and size of each unit was adjusted
to approximate a horseshoe dehumidification unit. It seemed to work. </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size:10.0pt;font-family:Arial"> </span></font></p>
<p style="margin:0in;margin-bottom:.0001pt"><b><b><font color="black" face="Arial" size="3"><span style="font-size:12.0pt;font-family:Arial;color:black">Kathryn Kerns</span></font></b></b></p>
<p style="margin:0in;margin-bottom:.0001pt"><i><b><i><font face="Arial" size="2"><span style="font-size:11.0pt;font-family:Arial;font-weight:bold;font-style:normal">Systems Specialist</span></font></i></b></i></p>
<p style="margin:0in;margin-bottom:.0001pt"><i><b><i><font color="teal" face="Times New Roman" size="3"><span style="font-size:12.0pt;font-variant:small-caps;color:teal;font-weight:bold;font-style:normal">BCE</span></font></i></b></i><b><b><font color="teal" face="Times New Roman" size="2"><span style="font-size:10.0pt;font-variant:small-caps;color:teal"> </span></font><font color="teal"><span style="font-variant:small-caps;color:teal">Engineers, Inc.</span></font></b></b></p>
<p style="margin:0in;margin-bottom:.0001pt"><b><b><font color="black" face="Times New Roman" size="1"><span style="font-size:9.0pt;color:black">| Ph: <a href="tel:253.922.0446" target="_blank">253.922.0446</a> | Fx: <a href="tel:253.922.0896" target="_blank">253.922.0896</a> |</span></font></b></b><font color="black" size="1"><span style="font-size:7.0pt;color:black"> </span></font></p>
<p class="MsoNormal"><font color="black" face="Arial" size="4"><span style="font-size:13.5pt;font-family:Arial;color:black"> </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12.0pt"> </span></font></p>
</div>
</div>
<br></div></div>_______________________________________________<br>
Equest-users mailing list<br>
<a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><br>
To unsubscribe from this mailing list send a blank message to <a href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG" target="_blank">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a><br>
<br></blockquote></div><font color="#888888"><br><br clear="all"><br>-- <br>Carol Gardner PE<br>
</font></blockquote></div><br><br clear="all"><br>-- <br>Carol Gardner PE<br>