<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<TITLE>RE: [BLDG-SIM] Variable Speed Exhaust</TITLE>
<META content="MSHTML 6.00.2716.2200" name=GENERATOR></HEAD>
<BODY>
<DIV>
<P><FONT size=2><SPAN class=435142721-03012003>Hello:</SPAN></FONT></P>
<P><FONT size=2><SPAN class=435142721-03012003>Can't help but jump in when
someone refers to me as a "lofty scholar". Actually, my lab office is in the
basement (chamber of doom?).</SPAN></FONT></P>
<P><FONT size=2><SPAN class=435142721-03012003></SPAN></FONT> </P>
<P><FONT size=2><SPAN class=435142721-03012003>Not a bad answer from John
Aulbach. I agree that Jeff Hirsh would be the one to answer questions about
PowerDOE. I'm also a </SPAN></FONT></P>
<P><FONT size=2><SPAN class=435142721-03012003>"barefoot" DOE-2 user who writes
his own BDL. Obviously, at some point your going to need to dig into the manual
and see what </SPAN></FONT></P>
<P><FONT size=2><SPAN class=435142721-03012003>each fan in your system is and
how that compares to what you want. I'm not sure what PowerDOE
does.</SPAN></FONT></P>
<P><FONT size=2><SPAN class=435142721-03012003>It is my understanding that DOE-2
can be used to simulate "demand" ventilation, by specifying the CFM/PERSON,
which is really</SPAN></FONT></P>
<P><FONT size=2><SPAN class=435142721-03012003>acting like a perfect CO2
controller. The fans and the amount of ventilation would need to be described by
the user. Most likely,</SPAN></FONT></P>
<P><FONT size=2><SPAN class=435142721-03012003>looking at some of the hourly
outputs for a given day would be helpful in your case.</SPAN></FONT></P>
<P><FONT size=2><SPAN class=435142721-03012003>Jeff</SPAN></FONT></P>
<P><FONT size=2><SPAN
class=435142721-03012003>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++</SPAN></FONT></P>
<P><FONT size=2>I'm trying to simulate a variable speed exhaust fan of the type
manufactured by Melink. <SPAN class=435142721-03012003> </SPAN>Supposedly,
the exhaust will turn on as required based on room temperature and on smoke/CO2
levels. I was thinking to maybe model just a CO2 demand control ventilation
system using a minimum outside air schedule.<SPAN class=435142721-03012003>
</SPAN>I appreciate your help. I'm still learning PowerDOE, and learning it on
my own. Do you know of any colleges that might do distance learning for
simulation programs of this type?<SPAN class=435142721-03012003> </SPAN><SPAN
class=435142721-03012003>A</SPAN>gain, thanks for any help.</FONT></P>
<P><FONT size=2>Sincerely,</FONT></P>
<P><FONT size=2>JP Carioto</FONT></P></DIV>
<DIV><FONT face=Tahoma size=2>8=! 8=) :=)
8=) ;=) 8=) 8=( 8=)
8=() 8=) 8=| 8=)
:=') 8=) 8=) 8=?</FONT> </DIV>
<P><I><FONT face=Tahoma size=2>Jeff S. Haberl, Ph.D.,
P.E.............................jhaberl@esl.tamu.edu</FONT></I> <BR><I><FONT
face=Tahoma size=2>Associate Professor....................................Office
Ph: 979-845-6507</FONT></I> <BR><I><FONT face=Tahoma size=2>Department of
Architecture...........................Lab Ph: 979-845-6065</FONT></I>
<BR><I><FONT face=Tahoma size=2>Energy Systems
Laboratory...........................FAX: 979-862-2457</FONT></I> <BR><I><FONT
face=Tahoma size=2>Texas A&M
University..................................77843-3581</FONT></I> <BR><I><FONT
face=Tahoma size=2>College Station, Texas, USA...........................URL:
www-esl.tamu.edu</FONT></I> </P>
<P><FONT face=Tahoma size=2>8=/ 8=) :=) 8=)
;=) 8=) 8=() 8=) :=)
8=) 8=! 8=) 8=? 8=)
8=) 8=0 </FONT></P>
<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> postman@gard.com
[mailto:postman@gard.com]<B>On Behalf Of </B>Aulbach, John<BR><B>Sent:</B>
Friday, January 03, 2003 1:55 PM<BR><B>To:</B>
BLDG-SIM@gard.com<BR><B>Subject:</B> [BLDG-SIM] Variable Speed
Exhaust<BR><BR></FONT></DIV>
<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> </P><BR>
<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> </P>
<P><FONT size=2>======================================================</FONT>
<BR><FONT size=2>You received this e-mail because you are subscribed
</FONT><BR><FONT size=2>to the BLDG-SIM@GARD.COM mailing list. To
unsubscribe </FONT><BR><FONT size=2>from this mailing list send a blank
message to </FONT><BR><FONT size=2>BLDG-SIM-UNSUBSCRIBE@GARD.COM</FONT>
</P></BLOCKQUOTE><PRE>
===========================
You received this e-mail because you are subscribed
to the BLDG-SIM@GARD.COM mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE@GARD.COM
</PRE></BODY></HTML>