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<DIV dir=ltr><FONT face=Arial color=#000000 size=2>The following studies on the effects of ramps in lighting and thermal conditions (for shedding electricity loads in artificially lit and air-conditioned environments) may be of interest (not sure how this would/wouldn't fit in a 'tropical' context).</FONT></DIV>
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<DIV dir=ltr><FONT color=#000000><A href="http://irc.nrc-cnrc.gc.ca/pubs/fulltext/nrcc48678/nrcc48678.pdf"><FONT face=Arial size=2>http://irc.nrc-cnrc.gc.ca/pubs/fulltext/nrcc48678/nrcc48678.pdf</FONT></FONT><U><FONT color=#0000ff></FONT></U></A></DIV>
<DIV dir=ltr><U><FONT color=#0000ff size=3><FONT face=Arial size=2><A href="http://irc.nrc-cnrc.gc.ca/ie/lighting/office/demand_e.html">http://irc.nrc-cnrc.gc.ca/ie/lighting/office/demand_e.html</A></FONT></FONT></U></DIV><U><FONT face=Arial color=#0000ff size=2></FONT></U></DIV>
<DIV dir=ltr><U><FONT face=Arial color=#0000ff size=2></FONT></U> </DIV>
<DIV dir=ltr>Denis Bourgeois, PhD</DIV>
<DIV dir=ltr>École d'architecture, Université Laval</DIV>
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<DIV dir=ltr><FONT face=Tahoma size=2><B>De:</B> BLDG-SIM@gard.com de la part de Peterson, John<BR><B>Date:</B> jeu. 2007-06-14 16:33<BR><B>Ŕ:</B> BLDG-SIM@gard.com<BR><B>Objet :</B> [BLDG-SIM] Reducing HVAC operational period<BR></FONT><BR></DIV></DIV>
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<P class=MsoNormal><FONT face=Garamond color=blue size=2><SPAN style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Garamond">Use CO2 sensors in the spaces. Have a maximum setting for each, with no allowance for averaging among them. If any single sensor hits, say, 1000 PPM, the AHU providing outside air should respond by opening the OA damper. This control scheme also works well for spaces with changing occupancy, such as an entire office goes to lunch. The control logic is in addition to cooling demand, but works well to save energy from conditioning the same amount of outside air all day long, every day. </SPAN></FONT></P>
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<P class=MsoNormal><FONT face=Garamond color=blue size=2><SPAN style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Garamond">For reducing the lighting load, we have approached it several ways. One method was to provide occupancy sensors for each desk, office or area. Corridors were always lit. Another was to provide a sophisticated light sensor system that could energize & dim the lights to maintain an acceptable lighting level. This works well for saving energy when you need to most – hot, sunny days. It also responds gradually to cloudy days so that the occupants don’t even notice the levels changing. Each of these was more expensive, and you are taking control out of the hands of the occupants for the most part – something most people hate to give up. </SPAN></FONT></P>
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<P class=MsoNormal><FONT face="Times New Roman" color=blue size=2><SPAN style="FONT-SIZE: 10pt; COLOR: blue">John Peterson, PE, LEED AP</SPAN></FONT></P></TD></TR>
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<P class=MsoNormal><FONT face="Times New Roman" color=blue size=2><SPAN style="FONT-SIZE: 10pt; COLOR: blue"><A href="http://www.vanderweil.com/">www.vanderweil.com</A> </SPAN></FONT></P></TD>
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<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> BLDG-SIM@gard.com [mailto:BLDG-SIM@gard.com] <B><SPAN style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Vikram Sami<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Thursday, June 14, 2007 3:46 PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> BLDG-SIM@gard.com<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [BLDG-SIM] Reducing HVAC operational period</SPAN></FONT></P></DIV>
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<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">I'm guessing if you have no operable windows and you have occupancy at that time, you will have a LOT of unhappy campers - regardless of climate type. You need fresh air to be productive. One option could be to maintain fan power and fresh air, but set the temperature higher (in tropical climates).</SPAN></FONT></P>
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<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Lighting reduction will depend on how well you design the spaces for daylight harvesting. Again - you don't want people working in the dark. </SPAN></FONT></P>
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<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Hope this helps.</SPAN></FONT></P>
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<P><B><FONT face=Garamond color=black size=3><SPAN style="FONT-WEIGHT: bold; FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: Garamond">Vikram Sami,</SPAN></FONT></B> <FONT face=Garamond color=black><SPAN style="COLOR: black; FONT-FAMILY: Garamond">LEED AP</SPAN></FONT> <BR><FONT face=Garamond color=black><SPAN style="COLOR: black; FONT-FAMILY: Garamond">Direct Phone 404-253-1466 | Direct Fax 404-253-1366</SPAN></FONT> </P>
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<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><B><FONT face=Tahoma size=2><SPAN style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> BLDG-SIM@gard.com [mailto:BLDG-SIM@gard.com] <B><SPAN style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Kofoworola<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Thursday, June 14, 2007 12:23 PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> BLDG-SIM@gard.com<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [BLDG-SIM] Reducing HVAC operational period</SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Dear All,</SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">What are the chances that reducing HVAC operating hours (i.e. starting it at 9.00am rather than 8.30am in the morning and shutting it down 30 minutes before closing hours), will affect indoor air quality and productivity in office buildings in Tropical climates.</SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Additionally, could lighting period be reduced during the working period and for how long within the same tropical conditions.</SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">-- <BR>Kofoworola, O.F. </SPAN></FONT></P><PRE><FONT face="Courier New" size=2><SPAN style="FONT-SIZE: 10pt"> </SPAN></FONT></PRE><PRE><FONT face="Courier New" size=2><SPAN style="FONT-SIZE: 10pt"> </SPAN></FONT></PRE><PRE><FONT face="Courier New" size=2><SPAN style="FONT-SIZE: 10pt">=====================================================You received this e-mail because you are subscribed </SPAN></FONT></PRE><PRE><FONT face="Courier New" size=2><SPAN style="FONT-SIZE: 10pt">to the BLDG-SIM@GARD.COM mailing list. To unsubscribe </SPAN></FONT></PRE><PRE><FONT face="Courier New" size=2><SPAN style="FONT-SIZE: 10pt">from this mailing list send a blank message to </SPAN></FONT></PRE><PRE><FONT face="Courier New" size=2><SPAN style="FONT-SIZE: 10pt">BLDG-SIM-UNSUBSCRIBE@GARD.COM</SPAN></FONT></PRE>
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