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<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'>Hi All,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'>Does anyone know a way to schedule maximum / minimum humidity
limits? My set points vary based on the season (month). <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'>I have tried defining an expression (switch statement, similar to
an if-then statement) in the maximum and minimum humidity fields. However, I
believe that this statement is only evaluated during the BDL build (one time,
before the simulation run) and not hourly, during the simulation. As such, one
value is selected (the switch default) and that value is used throughout the
year.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'>My other thought is to create a global parameter (e.g. MAXHUM) that
references a fraction schedule with the values changing per season, and use {#pa
(“MAXHUM”)} as the expression for the max humidity. However,
I can’t find a way to accomplish this (if it’s possible). <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'>Any other ideas?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'>Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'>Pete<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Times New Roman","serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Times New Roman","serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-family:"Times New Roman","serif";
color:black'>Peter Worley</span></b><b><span style='font-family:"Times New Roman","serif";
color:black'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Times New Roman","serif";
color:#595959'>Mechanical Engineer<o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify;text-indent:.5in'><span
style='font-size:10.0pt;font-family:"Times New Roman","serif";color:#595959'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-align:justify'><b><span style='font-family:"Times New Roman","serif";
color:#595959'>Arup<o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Times New Roman","serif";
color:#595959'>155 Avenue of the Americas New York NY
10013 USA<o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Times New Roman","serif";
color:#595959'>t</span></b><span style='font-size:10.0pt;font-family:"Times New Roman","serif";
color:#595959'> +1 212 229 2669 <b>d</b> +1 212 897 1339 <o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Times New Roman","serif";
color:#595959'>f</span></b><span style='font-size:10.0pt;font-family:"Times New Roman","serif";
color:#595959'> +1 212 229 1056<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Times New Roman","serif";
color:#595959'>www.arup.com<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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<pre style="white-space:normal">____________________________________________________________<br>Electronic mail messages entering and leaving Arup business<br>systems are scanned for acceptability of content and viruses<br></pre></body>
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