<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2800.1400" name=GENERATOR></HEAD>
<BODY style="MARGIN: 4px 4px 1px; FONT: 10pt Arial">
<DIV>Hi,</DIV>
<DIV> </DIV>
<DIV>A PV related query again. This time I would like to find out if anyone can suggest an algorithm or tool that accounts for the effect of partial shading on an array. From what I understand, EnergyPlus and eQuest algorithms factor the effect of shading through adjusting the effective irradiation incident on the surface to which the array is attached. Please correct me if I am wrong in understanding this. </DIV>
<DIV> </DIV>
<DIV>But the effect of partial shading is quite different depending on the location of the actual cell in series. The shaded cell depending on its location in the series can degrade the performance a lot more than proportional to the % of area shaded. Can anyone confirm if any tool or algorithm takes into account his fact.</DIV>
<DIV> </DIV>
<DIV>Any help and advise regarding this issue is appreciated.</DIV>
<DIV> </DIV>
<DIV>Thank you,</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>PS-
<DIV>eQuest output for PV performance states that</DIV>
<DIV>"NOTE: PARTIAL SHADING OF A PV ARRAY CAN SEVERELY DEGRADE ITS PERFORMANCE, BUT IS NOT TAKEN INTO ACCOUNT SEE REPORT LS-SH FOR SHADING INFORMATION"</DIV>
<DIV> </DIV>
<DIV>Smita Gupta<BR>Energy Analyst, LEED AP</DIV>
<DIV> </DIV>
<DIV>Buildings & Appliances Office<BR>California Energy Commission<BR>1516 Ninth St. MS-25<BR>Sacramento, CA 95814<BR>Phone: (916) 657-4034<BR>Fax: (916) 654-4304<BR></DIV></DIV><PRE>
======================================================
You received this e-mail because you are subscribed
to the BLDG-SIM@GARD.COM mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE@GARD.COM
</PRE></BODY></HTML>