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<DIV><FONT face=Arial size=2>Ian,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>What program are you using to get these results
? Since the loads and temperatures are so dependent on the solar gain and
the building's thermal mass, I would want to see plots of the inside and outside
temperature, ventilation rates, and solar gain over the course of both
day. What is the temperature range on the day that peaks at 98 F ? I
do find it odd that the building overheats so much more when the temperature
peaks at only 82 F.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Joe</FONT></DIV>
<DIV> </DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=Ian.Doebber@arup.com href="mailto:Ian.Doebber@arup.com">Ian
Doebber</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=BLDG-SIM@gard.com
href="mailto:BLDG-SIM@gard.com">BLDG-SIM@gard.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, March 16, 2007 6:15
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [BLDG-SIM] Odd results when
using Natural Ventilation</DIV>
<DIV><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I have a naturally ventilated
office and am using the Sherman Grimsrud method. Even when I
specify a Vent Area Fraction of 0.01 and a max ACH of 0.01 still get
enough air flow such that during the hottest hour of the year in Seattle which
is 98°F, the inside temperature only peaks at 99°F which is impossible
since there is considerable amounts of glass and internal heat gain.
With these inputs there should be no ventilation and I should be getting
extremely hot temperatures. <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Then again, looking at the summer
design day which is specified as a 82°F and 18°F range and the indoor
conditions are shown below. Why is the design day which has a relative
low max temperature predicting so much hotter indoor temperatures that make
sense compared to those from the annual simulation.
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">110.9<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">111<o:p></o:p></SPAN></FONT></P></TD></TR>
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">111<o:p></o:p></SPAN></FONT></P></TD></TR>
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">111.1<o:p></o:p></SPAN></FONT></P></TD></TR>
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">111.3<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">107.1<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD
style="PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0in; WIDTH: 48pt; PADDING-TOP: 0in; HEIGHT: 12.75pt"
vAlign=bottom noWrap width=64 height=17 x:num>
<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">105.4<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">104.5<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD
style="PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0in; WIDTH: 48pt; PADDING-TOP: 0in; HEIGHT: 12.75pt"
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">104.1<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD
style="PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0in; WIDTH: 48pt; PADDING-TOP: 0in; HEIGHT: 12.75pt"
vAlign=bottom noWrap width=64 height=17 x:num>
<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">104.2<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">104.6<o:p></o:p></SPAN></FONT></P></TD></TR>
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<TD
style="PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0in; WIDTH: 48pt; PADDING-TOP: 0in; HEIGHT: 12.75pt"
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">105.1<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD
style="PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0in; WIDTH: 48pt; PADDING-TOP: 0in; HEIGHT: 12.75pt"
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">105.8<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD
style="PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0in; WIDTH: 48pt; PADDING-TOP: 0in; HEIGHT: 12.75pt"
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">106.9<o:p></o:p></SPAN></FONT></P></TD></TR>
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">108.1<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD
style="PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0in; WIDTH: 48pt; PADDING-TOP: 0in; HEIGHT: 12.75pt"
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">109.3<o:p></o:p></SPAN></FONT></P></TD></TR>
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">110.5<o:p></o:p></SPAN></FONT></P></TD></TR>
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">111.3<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD
style="PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0in; WIDTH: 48pt; PADDING-TOP: 0in; HEIGHT: 12.75pt"
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">111.2<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD
style="PADDING-RIGHT: 5.4pt; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0in; WIDTH: 48pt; PADDING-TOP: 0in; HEIGHT: 12.75pt"
vAlign=bottom noWrap width=64 height=17 x:num>
<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">109.9<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD
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vAlign=bottom noWrap width=64 height=17 x:num>
<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">108.1<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">110.4<o:p></o:p></SPAN></FONT></P></TD></TR>
<TR style="HEIGHT: 12.75pt" height=17>
<TD
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">110.8<o:p></o:p></SPAN></FONT></P></TD></TR>
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<TD
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<P class=MsoNormal style="TEXT-ALIGN: right" align=right><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">110.9<o:p></o:p></SPAN></FONT></P></TD></TR></TBODY></TABLE>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P></DIV><PRE>____________________________________________________________
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