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<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Hi Holly,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>First I should
say that questions on DesignBuilder should ideally be addressed to either the
DesignBuilder forum or our supportdesk.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>From what you
say, it sounds like you should continue to use the DesignBuilder scheduled
natural ventilation mechanism where you can specify the air change rate plus a
schedule but ideally also make use of the EnergyPlus “ZoneVentilation >
Minimum Outdoor Temperature” data as well. Unfortunately DB does not yet provide
an interface to this, though it does allow you to specify “Max
temperature difference for operation”, i.e. the maximum temperature
difference between inside and outside, but not min/max outside temperatures.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>We plan to
provide an interface to this extra ZoneVentilation data within DesignBuilder in
a near future beta so, depending on your timescales, you could wait for that. If
this is not practical then you can export to IDF and add the data there.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Andy Tindale<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>DesignBuilder<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p>
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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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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>Hi,<o:p></o:p></span></p>
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<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>
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<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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