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<TITLE>RE: [BLDG-SIM] Variable Speed Exhaust</TITLE>
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<P><FONT SIZE=2>Got an idea, but it needs further research. I run DOE-2.1E, and PoweDOE is 2.2, but everything in my version carries forward in intent and philosophy into 2.2.</FONT></P>
<P><FONT SIZE=2>Chose a SYSTEM (or whatever PowerDOE calls a SYSTEM) that is a VAV system that allows a RETURN-AIR fan. Make that SYSTEM 100% outside air. Therefore both SUPPLY and RETURN FANS are variable flow, and the RETURN FAN essentially becomes an EXHAUST or RELIEF fan.</FONT></P>
<P><FONT SIZE=2>You then need to tell the fans what controls their speed, which could be temperature, or a schedule for usage (occupied/unoccupied, etc). If your kitchen SUPPLY fan actually exists, it will have a variable flow over its coils. If all air is entrained into the space (NO SUPPLY FAN), simply set the KW/CFM to zero and any coils it contains to ZERO btu capacity to negate any energy usage from a SUPPLY FAN.</FONT></P>
<P><FONT SIZE=2>By the way, I believe PowerDOE will give you, in the raw DOE2 reports, all fans individually by SYSTEM consumption. The RETURN FAN will be your EXHAUST FAN.</FONT></P>
<P><FONT SIZE=2>I believe this will give you a variable speed exhaust. I would like my colleagues in DOE2 cyberspace to confirm my suspicions. Jeff Hirsch, Jeff Haberl, and other lofty scholars, do you think this will give this gentleman his answer?</FONT></P>
<P><FONT SIZE=2>-----Original Message-----</FONT>
<BR><FONT SIZE=2>From: HermesPropylaios@aol.com [<A HREF="mailto:HermesPropylaios@aol.com">mailto:HermesPropylaios@aol.com</A>]</FONT>
<BR><FONT SIZE=2>Sent: Friday, January 03, 2003 11:03 AM</FONT>
<BR><FONT SIZE=2>To: BLDG-SIM@GARD.COM</FONT>
<BR><FONT SIZE=2>Subject: [BLDG-SIM] Variable Speed Exhaust</FONT>
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<P><FONT SIZE=2>Hi all:</FONT>
<BR><FONT SIZE=2> I'm trying to model a variable speed exhaust fan in a kitchen for a large hotel in PowerDOE. I'm not sure how to go about it. If anyone could give me some ideas, or if anyone has done this before, I would appreciate it. Thank you.</FONT></P>
<P><FONT SIZE=2>John Carioto</FONT>
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