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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Dear eQuest users,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am trying to model Variable Speed Drive Fans. The EIR
(Electric Input Ratio) as a function of PLR (Part Load Ratio) can be defined as
a quadratic performance curve with the help of Row Data Points given by the
manufacturer.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The fans are designed to work at part-load of 0.75 or less because
this way they are more energy efficient, i.e. the supply electrical power intensity
kW/cfm is lower. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>What would the <b><span style='font-weight:bold'>Design</span></b>
kW/cfm be in this case? I am thinking of using the power intensity that is
given at 0.75 Load Ratio as in the actual system this will be my pick
conditions. But I am not feeling very confident with that.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Should the <b><span style='font-weight:bold'>Design</span></b>
cfm of the supply flow be defined or calculated by the program? In the case of
it being defined what would be the input value: the air flow of the 0.75 part
load (at pick conditions) or the 1.00 full load ratio that is never applied.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Any help will be appreciated. Thanks in advance,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Christina<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
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<p class=style1 style='margin:0cm;margin-bottom:.0001pt'><st1:PersonName w:st="on"><b><font
size=2 face=Arial><span style='font-size:11.0pt;font-weight:bold'>Christina
Galyfianaki</span></font></b></st1:PersonName><b><span style='font-weight:
bold'> <br>
Simulation Consultant</span></b><o:p></o:p></p>
<p class=style1 style='margin:0cm;margin-bottom:.0001pt'><b><font size=2
face=Arial><span style='font-size:11.0pt;font-weight:bold'>Building Physics
Division<o:p></o:p></span></font></b></p>
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w:st="on"><b><font size=2 face=Arial><span style='font-size:11.0pt;font-weight:
bold'>West End</span></font></b></st1:PlaceName></st1:place><b><span
style='font-weight:bold'> Office<o:p></o:p></span></b></p>
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face=Arial><span style='font-size:10.0pt;font-weight:bold'><o:p> </o:p></span></font></b></p>
<p class=MsoNormal><b><font size=5 color="#00387d" face=Arial><span
style='font-size:18.0pt;font-family:Arial;color:#00387D;font-weight:bold'>hurleypalmerflatt</span></font></b><b><i><font
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Arial;color:#00387D;font-weight:bold;font-style:italic'> <o:p></o:p></span></font></i></b></p>
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face=Arial><span style='font-size:8.0pt;font-family:Arial;color:#00387D;
font-weight:bold;font-style:italic'>building</span></font></i></b><font size=1
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<p class=style1 style='margin:0cm;margin-bottom:.0001pt'><strong><b><font
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<strong><b><font face=Arial><span style='font-family:Arial'>e:</span></font></b></strong>
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