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<DIV><SPAN class=964453218-07102002><FONT face=Arial color=#0000ff size=2>There
is a DOE22 keyword called</FONT></SPAN><SPAN class=964453218-07102002><FONT
face=Arial color=#0000ff size=2> "OUTSIDE-EMISS" which I think can be
modified to represent a Cool Roof, along with the "ABSORPTANCE" keyword that you
mentioned. When I attempted to model a Cool Roof, I also didn't see any big
results until I found the "OUTSIDE-EMISS" keyword. </FONT></SPAN></DIV>
<P><B><FONT face=Arial color=#808080 size=2>Tracy L. Cornish</FONT></B><FONT
face=Arial color=#808080 size=2>, P.E., Mechanical Engineer, Taylor Engineering,
LLC</FONT> <BR><FONT face=Arial color=#808080 size=2>1305 Marina Village
Parkway, Suite 101, Alameda CA 94501-1028</FONT> <BR><FONT face=Arial
color=#808080 size=2>(510) 749-9135 office, (510) 749-9136 fax, (925) 381-8183
mobile</FONT> </P>
<P><FONT face=Arial color=#808080
size=2>tcornish@taylor-engineering.com</FONT><U></U><U></U><U></U> <BR><FONT
face=Arial color=#0000ff size=2>www.taylor-engineering.com </FONT></P><BR>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Wade McLaughlin
[mailto:wmclaughlin@dmiinc.com]<BR><B>Sent:</B> Monday, October 07, 2002 10:55
AM<BR><B>To:</B> BLDG-SIM@GARD.COM<BR><B>Subject:</B> [BLDG-SIM] "Cool
Roofing"<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>Has anyone had any success modeling cool roofing
options (i.e. reflective or light colored surfaces) in PowerDOE? So far,
I have seen negligible results from the adjustment of roof construction
absorptance values (emissivity is also known to play a role, but there is no
input for this in PowerDOE). I have seen data showing cooling
energy savings from 0.06 to 0.54 kWh/sqft/yr, depending on building
type. I am getting only a very small fraction of this. Data
collected in the study was from facilities in the southern and western US, and
I work primarily on buildings in the Northeast.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>My questions:</FONT></DIV>
<DIV><FONT face=Arial size=2>How well can I expect PowerDOE to
simulate this? Is there a better way to simulate cool roofing? Is
the sun simply too low in the sky in New England to yield substantial
savings?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Your thoughts are appreciated.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Wade McLaughlin<BR>DMI<BR>450 Lexington
St.<BR>Newton, MA 02466<BR>p 617-527-1525 x103<BR>f
617-527-6606</FONT></DIV><PRE>
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