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<TITLE>Modeling DX with reheat in VisualDOE/DOE-2</TITLE>
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<DIV><SPAN class=788551217-07042003><FONT face=Arial color=#0000ff size=2>As a
long time DOE-2 user, I would go with the Constant Volume Reheat, make the
chiller an air cooled DX, and kill the hot water and chilled water pumps. As you
appear to be running Visual DOE, you do not have the "fancy" version of DOE-2.1E
to actually put in kW/GPM for hot and chilled water pumps. You need to keep the
pseudo-chilled water flow going to the the chiller (else the chiller will not
operate). The fact you have electric heat negates any problems with the hot
water pump.</FONT></SPAN></DIV>
<DIV><SPAN class=788551217-07042003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=788551217-07042003><FONT face=Arial color=#0000ff size=2>Try
something like 100% loss or 0% motor efficiency to remove any pump
kW.</FONT></SPAN></DIV>
<DIV><SPAN class=788551217-07042003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=788551217-07042003><FONT face=Arial color=#0000ff size=2>Hope
it works. Have BLDG-SIMs other "wise" emissaries input at
well.</FONT></SPAN></DIV>
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> John M. Topmiller
[mailto:jmt@abacus-engr.com]<BR><B>Sent:</B> Monday, April 07, 2003 5:42
AM<BR><B>To:</B> BLDG-SIM@gard.com<BR><B>Subject:</B> [BLDG-SIM] Modeling DX
with reheat in VisualDOE/DOE-2<BR><BR></FONT></DIV><!-- Converted from text/rtf format -->
<P><FONT face=Arial size=2>I have a fairly simple system in a building that I
am modeling but I'm not sure the best DOE-2 system to use. The building
is served by one air handler in the middle of the building with DX cooling and
no heating at the unit level. Each of the two sides of the building has
electric resistance reheats in the ducts; I'd figure I'd model the building
with two zones each with 50 kW reheat. I considered modeling the system
as Packaged Single Zone AC with Heating and Subzone Reheating, however, with
this system the heating in the control zone comes from the air handler and
only the subzones have reheat capabilities. With this system I'd have to
set up a dummy control zone to truly model the building. The system also
is close to the Constant-Volume Reheat Fan System in the DOE-2 manual, but I
have DX cooling and not a chiller and cooling coil system. With this
system I'd have to convert the cooling loads of the chiller to that of a DX
system. </FONT></P>
<P><FONT face=Arial size=2>Does anyone have any experience with this type of
system and know the best way to proceed?</FONT> </P>
<P><FONT face=Arial size=2>Thanks,</FONT> </P>
<P><FONT face=Arial size=2>John M. Topmiller, CEM</FONT> <BR><FONT face=Arial
size=2>Energy Engineer</FONT> <BR><FONT face=Arial size=2>Abacus Engineered
Systems</FONT> <BR><FONT face=Arial size=2>4431 North Front St., Suite
100<BR>Harrisburg, PA 17110-1709</FONT> <BR><FONT face=Arial size=2>p: (717)
232-8182 ext. 239</FONT> <BR><FONT face=Arial size=2>c: (717) 514-9767<BR>f:
(717) 232-8187</FONT> <BR><A href="mailto:jmt@abacus-engr.com"><U><FONT
face=Arial size=2>jmt@abacus-engr.com</FONT></U></A> </P>
<P><A href="http://www.abacus-engr.com"><U><FONT face=Arial
size=2>www.abacus-engr.com</FONT></U></A> </P><PRE>
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