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<DIV><FONT face=Arial size=2>Without knowing more details, it is hard to
say. You might want to check what your floor is doing. If you have
slab on grade, you need to make an adjustement to the effective area and U-Value
in contact with the ground. There are some 2.1E supplements that cover
this. If you don't make this adjustment you can end up sucking heat from
the space into the slab and end up with a heating load ...</FONT></DIV>
<DIV><FONT face=Arial size=2>Regards,</FONT></DIV>
<DIV><FONT face=Arial size=2>Graham</FONT></DIV></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=btalbert@aeieng.com href="mailto:btalbert@aeieng.com">Bill
Talbert</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, November 07, 2003 3:35
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [BLDG-SIM] DOE2.1e
Sunspace</DIV>
<DIV><BR></DIV>
<DIV><FONT size=2>Hello,</FONT></DIV>
<DIV><FONT size=2>I am working on a model of a lab building with a two-story
corridor along the east facade of the building. There is a large wall of
glazing on the east side and an opening between the floors to allow
for natural ventilation. I am attempting to model a vented sunspace using
DOE2.1e (using a Residential System with hot water heat -
RESYS) in order to take advantage of the mass wall along the west side of
the corridor. There is no direct venting to the surrounding zones (only free
circulation from the lower to the upper level with louvered openings to the
outside on each floor). The output file is indicating negative
cooling energy use for the sunspace system. There are two other systems that
require mechanical cooling, but the negative cooling energy in the sunspace is
offsetting this energy use which results in a negative overall value for the
building. My first thought was that heat transfer from the sunspace was
cooling the surrounding zones, but the zones with mechanical cooling are not
directly adjacent to the sunspace and have high internal loads. Does anyone
have any experience with this situation? I would appreciate any
assistance.</FONT></DIV>
<DIV><FONT size=2>Thanks</FONT><FONT size=2>,</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Bill Talbert<BR>Mechanical Engineer<BR>USGBC LEED Accredited
Professional<BR>Affiliated Engineers, Inc.<BR></DIV><PRE>
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