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<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=167501212-24092004>You
should visit the EPRI website (<A
href="http://www.epri.com">www.epri.com</A>) and request news brief 47
which is titled "Evaluation of Losses in ASD/Motor Systems". This
newsbrief does a good job describing how system efficiency is affected by
the use of a VFD. </SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><SPAN class=167501212-24092004><FONT face=Arial color=#0000ff
size=2>Mike</FONT></SPAN></DIV>
<DIV><SPAN class=167501212-24092004><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
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size=2></FONT></SPAN> </DIV><!-- Converted from text/rtf format -->
<P><SPAN lang=en-us><B><FONT face=Arial size=2>Michael Tillou, PE<BR>etc Group,
Inc.<BR>PO Box 7, Williamstown, MA 01267<BR>ph. (413)
458-9870 <BR></FONT><BR><FONT
face="Arial Narrow"> </FONT></B><FONT face=Arial> </FONT></SPAN></P>
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<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> postman@gard.com
[mailto:postman@gard.com] <B>On Behalf Of </B>Fernando Domínguez
Muñoz<BR><B>Sent:</B> Friday, September 24, 2004 7:10 AM<BR><B>To:</B>
BLDG-SIM@GARD.COM<BR><B>Subject:</B> [BLDG-SIM] PLF curves for inverter
units<BR><BR></FONT></DIV>
<DIV><FONT face="times new roman" size=3>Dear users,</FONT></FORM>
<DIV id=message>
<DIV><FONT face="times new roman" size=3>I'm simulating a residential VAV
system with TRNSYS. The air conditioner is the inverter unit RZP100DV1 of
Daikin, whose minimum partial load (load/max capacity) is 31%, so the unit
only cycles when PLR<0.31. How can I predict the degradation of system
efficiency under these circumstances? What DOE-2 function should I use? Does
somebody knows PLF functions for inverter units?</FONT></DIV>
<DIV><FONT face="times new roman" size=3></FONT> </DIV>
<DIV><FONT face="times new roman" size=3>Thank you in advance.</FONT></DIV>
<DIV><FONT face="times new roman" size=3></FONT> </DIV>
<DIV><FONT face="times new roman" size=3>F. Domínguez Muñoz</FONT></DIV>
<DIV><FONT face="times new roman" size=3>University of Málaga
(Spain)</FONT></DIV></DIV></DIV>
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