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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Holly,<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 use the scheduled mode you should be alright in doing roughly
what you want it to do using the scheduled air flow rates.<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'>Essentially you need to set up the Nat Vent Set-Point Temperature
on the Activity tab and you’ll see along with that you should have an
option for setting the Max In-Out Delta T. This should allow you to set
the model up with your scheduled rates, but put a realistic setting in there
which means that natural ventilation will not occur if the Delta T is higher
than say 5 deg C. It means it won’t bring in air that is too hot or
too cold and will only bring in as much as is possible with the Delta T that exists,
etc.<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'>Personally, I don’t quite get why you don’t just let
the model calculate it for you in calculated mode as I’d hope that way it
should be more accurate rather than trying to muddle together two separate
calculations. DesignBuilder can work out the stack/wind combined flow
easily enough.<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'> Kind Regards<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'>Paul<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>
<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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<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><img width=96 height=111 id="Picture_x0020_1"
src="cid:image006.jpg@01CAF2C2.D39F7360" alt="ZED_LOGO_SMALL"></span><span
style='font-size:10.5pt;font-family:Consolas;color:#1F497D'><o:p></o:p></span></p>
</td>
<td width=211 valign=top style='width:158.55pt;padding:0cm 5.4pt 0cm 5.4pt'>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Dr Paul Carey</span><span style='font-size:10.5pt;font-family:
Consolas;color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>BSc (Hons) PhD FRSA<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Director<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Low Carbon Energy Assessor<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
</td>
<td width=211 valign=top style='width:157.95pt;padding:0cm 5.4pt 0cm 5.4pt'>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Zero Energy Design Ltd</span><span style='font-size:10.5pt;
font-family:Consolas;color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>10A Portland Place<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>2-22 Mottram Road<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Stalybridge<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>SK15 3AD<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
</td>
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<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>T: 0161 3386200</span><span style='font-size:10.5pt;
font-family:Consolas;color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>F: 0161 3031281<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>M: 0789 4098012</span><span style='font-size:10.5pt;
font-family:Consolas;color:#1F497D'><o:p></o:p></span></p>
</td>
<td width=211 valign=top style='width:157.95pt;padding:0cm 5.4pt 0cm 5.4pt'>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>E: <a href="mailto:paul@zed-uk.com"><span
style='color:blue'>paul@zed-uk.com</span></a></span><span style='font-size:
10.5pt;font-family:Consolas;color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>W: <a href="http://www.zed-uk.com/"><span
style='color:blue'>www.zed-uk.com</span></a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><img border=0 width=200 height=81 id="Picture_x0020_2"
src="cid:image003.jpg@01CAF2C2.C04AB860"
alt="cid:image002.jpg@01CA48E6.60E6D920"><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
</td>
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<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
</td>
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<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
</td>
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<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><img border=0 width=110 height=88 id="Picture_x0020_3"
src="cid:image004.jpg@01CAF2C2.C04AB860"
alt="cid:image003.jpg@01CA48E6.60E6D920"><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:Consolas;
color:#1F497D'>Certificate No: GB16647<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
</td>
<td width=211 valign=top style='width:158.55pt;padding:0cm 5.4pt 0cm 5.4pt'>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><img border=0 width=110 height=88 id="Picture_x0020_4"
src="cid:image005.jpg@01CAF2C2.C04AB860"
alt="cid:image004.jpg@01CA48E6.60E6D920"><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;font-family:Consolas;
color:#1F497D'>Certificate No: GB16646</span><span style='font-size:10.5pt;
font-family:Consolas;color:#1F497D'><o:p></o:p></span></p>
</td>
<td width=211 valign=top style='width:157.95pt;padding:0cm 5.4pt 0cm 5.4pt'>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
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color:green'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:"MS Reference Sans Serif","sans-serif";
color:green'>Please carefully consider the environment before you print this
email.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:"MS Reference Sans Serif","sans-serif";
color:green'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'>Company Registered in England & Wales. Registration
No. 5815068<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'>Registered Address: 10A Portland Place, 2-22 Mottram Road,
Stalybridge, SK15 3AD, UK.</span><span lang=EN-US style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
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<p class=MsoNormal><u><span lang=EN-US style='font-size:10.0pt;font-family:
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color:#1F497D'>This email and any attachments to it are intended only for the
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>holly
wasilowski<br>
<b>Sent:</b> 12 May 2010 20:39<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] Natural Ventilation Control in Design Builder<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>Hi,<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>I am working with natural ventilation in DesignBuilder. In
another program (CoolVent) I calculated varying ACH due to wind and stack
effect. I made a schedule and input it into DesignBuilder. The problem
is, I would like DesignBuilder to both use my schedule of air changes AND close
the windows when it gets too cold outside. However, it seems that I can
either be in Scheduled or Calculated mode. Scheduled mode will use my ACH
schedule, and Calculated mode will close the windows when it's too cold.
It seems I can't make DesignBuilder take both into account. Am I missing
something? Thanks!<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>Holly<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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