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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Lars,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>For 1) , I assume you’re trying to recover heat from the hot gas
side of a DX cooling coil. This is considered waste heat, so I would research WASTE-HEAT-USE
= SPACE-HEAT. The screen shot below shows where to get started, and you’ll
need to determine what percent of your condenser capacity is available for
reheat. Note that it only works for packaged multizone systems, so you
probably need to treat your single zone system as a multizone with only one
zone. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><img width=446 height=332 id="Picture_x0020_3"
src="cid:image001.jpg@01CA385C.65B64070"></span><span style='font-size:11.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>For 2), you accomplish it two ways. At the system level, you
could define the following:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> MIN-OUTSIDE-AIR = 0.1029<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> OA-CONTROL = FIXED<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>You’re using MIN-OA-METHOD, but that’s more for specifying
whether you’re using an economizer or demand-controlled ventilation. You’ll
want to use OA-CONTROL to specify that the defined percent is constant (rather
than a minimum). In the interface, this is selected under economizer control (FIXED
meaning there is no economizer). <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The other way to specify an exact flow is at the zone level:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> OUTSIDE-AIR-FLOW = 216<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If you specify it at the zone level, you could leave the
MIN-OUTSIDE-AIR undefined at the system level. Zone OA settings/requirements trump
whatever is specified at the system level. When zone & system settings are
in conflict, it often results in a warning in the SIM file.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'> <o:p></o:p></span></p>
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width=71 height=90 src="cid:image006.jpg@01CA385C.65B64070" v:shapes="Picture_x0020_2"></span><![endif]><b><span
style='font-size:10.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'> DAKOTA KELLEY</span></b><span
style='font-size:10.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'> </span><span style='font-size:8.0pt;font-family:
"Franklin Gothic Book","sans-serif";color:black'> </span><b><span
style='font-size:10.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'> </span><span style='font-size:
10.0pt;font-family:"Franklin Gothic Book","sans-serif";color:black'>Project
Designer<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'> Office: 214-744-6199<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'> Cell: 214-280-3825<o:p></o:p></span></p>
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color:black'> Fax: 214-744-0770 <o:p></o:p></span></p>
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color:black'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'><a href="http://www.teliospc.com/"><span style='font-family:"Times New Roman","serif";
color:blue'>http://www.teliospc.com</span></a> 3535 Travis St. Suite
115 <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:black'><a href="mailto:dakotak@teliospc.com"><span style='font-family:
"Times New Roman","serif";color:blue'>dakotak@teliospc.com</span></a> Dallas,
TX 75204 <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:#3333FF'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:"Franklin Gothic Book","sans-serif";
color:#3333FF'>| MEP ENGINEERING </span><span style='font-size:8.0pt;
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color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<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"'> Lars Fetzek
[mailto:lfetzek@phoenixeng.us] <br>
<b>Sent:</b> Friday, September 18, 2009 9:28 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Two HVAC system definition problems<o:p></o:p></span></p>
</div>
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<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>eQuesters and DOE2-2ers,</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'> I have two problems concerning the code below,
from my .inp file as processed by eQuest into a BDL file:</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>1. Per my e-mail yesterday, I am trying to figure
out how to make line 3275 do hot-gas reheat. Any ideas? Apparently,
the only gas that DOE2-2 recognizes is combustible natural gas - not what
I intend here.</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>2. What is the problem with line 3278?
According to text page 361 (PDF page 368) of the DOE22Vol2-Dictionary.pdf, this
line is permissible and meaningful. What I am trying to do is simply tell
eQuest that HVAC has a constant 216 CFM of OA. Since DOE2-2 won't allow
such a simple thing, I'm trying to define it instead as 10.29% of the 2100 CFM
that this PSZ delivers to the single zone that it serves. Any ideas?</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'> I'm tired of reverse-engineering the whole world
just to tell eQuest simple little things. However, if I do things in
eQuest proper instead of in the .inp file, then I have no idea what variables
trump other variables, or even how to conjure all of the mysterious data that
eQuest shows/asks for.</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'> Thanks, everyone, for accepting my daily quiz.</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Lars Fetzek, EI</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Phoenix Engineering Group</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Tampa, Florida</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
*3272 * "HVAC3 System" = SYSTEM<br>
*3273 *
TYPE =
PSZ<br>
*3274 *
HEAT-SOURCE =
ELECTRIC
$verify<br>
*3275 * ZONE-HEAT-SOURCE =
NONE
$How do I make this hot-gas reheat?<br>
*3276 * BASEBOARD-SOURCE = NONE<br>
*3277 *
MIN-SUPPLY-T = 51.36<br>
*3278 *
MIN-OA-METHOD = FRACTION-OF-DESIGN<br>
*ERROR**************************** ==================
****************************************ILLEGAL CODEWORD<br>
*3279 *
FAN-SCHEDULE = "HVAC3 Fan Sch"<br>
*3280 *
FAN-PLACEMENT = DRAW-THROUGH<br>
*3281 *
FAN-CONTROL = CYCLING<br>
*3282 * SUPPLY-KW/FLOW =
.000749<br>
*3283 * SUPPLY-DELTA-T =
0 $Net capacity value used<br>
*3284 * COOLING-CAPACITY = 88170<br>
*3285 *
COOLING-EIR = .316<br>
*3286 * CRANKCASE-HEAT =
0<br>
*3287 *
CONTROL-ZONE = "Zone Space 3B"<br>
*3288 * ..</span><o:p></o:p></p>
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