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<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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