<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE></TITLE>
<META content="text/html; charset=us-ascii" http-equiv=Content-Type>
<META name=GENERATOR content="MSHTML 8.00.6001.18783"></HEAD>
<BODY bgColor=#ffffff text=#000000>
<DIV><SPAN class=234323917-27072009><FONT color=#0000ff size=2 face=Arial>I
vote: Assume all spaces are the same setpoint and temp for a LEED analysis
unless there will be actual, significant differences in the real
building</FONT></SPAN></DIV>
<DIV><SPAN class=234323917-27072009><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=234323917-27072009><FONT color=#0000ff size=2 face=Arial>a) The
simulation tool is assuming that the HVAC is trying to do exactly
that</FONT></SPAN></DIV>
<DIV><SPAN class=234323917-27072009><FONT color=#0000ff size=2 face=Arial>b)
Your weather file is an approximation (TMY)</FONT></SPAN></DIV>
<DIV><SPAN class=234323917-27072009><FONT color=#0000ff size=2 face=Arial>c) You
have no idea what the actual thermostats will be set for</FONT></SPAN></DIV>
<DIV><SPAN class=234323917-27072009><FONT color=#0000ff size=2 face=Arial>d) the
simulation will not model the actual control system response</FONT></SPAN></DIV>
<DIV><SPAN class=234323917-27072009><FONT color=#0000ff size=2 face=Arial>e)
LEED has accepted our models with that assumption, which I think is appropriate
based on the above reasons and a variety of others. There's only so much
you can expect from a model of a yet-to-be-constructed
facility!</FONT></SPAN></DIV>
<DIV> </DIV>
<DIV class=Section1>
<P style="TEXT-ALIGN: center" class=MsoNormal align=center><B
style="mso-bidi-font-weight: normal"><FONT size=4>The Building Performance
Team<BR></FONT></B><B style="mso-bidi-font-weight: normal">James V. Dirkes II,
P.E., LEED AP<BR></B>1631 Acacia Drive NW<BR>Grand Rapids, MI 49504<BR>616
450 8653<?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office" /><o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV> </DIV><BR>
<BLOCKQUOTE style="MARGIN-RIGHT: 0px" dir=ltr>
<DIV dir=ltr lang=en-us class=OutlookMessageHeader align=left>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>From:</B> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Cramer
Silkworth<BR><B>Sent:</B> Monday, July 27, 2009 1:23 PM<BR><B>To:</B>
bldg-sim@lists.onebuilding.org<BR><B>Subject:</B> [Bldg-sim] LEED modeling and
zone adjacencies...<BR></FONT><BR></DIV>
<DIV></DIV><FONT size=-1><FONT face="Helvetica, Arial, sans-serif">Hi
all,<BR><BR>I'm building a model (in TRNSYS) for LEED, and I'm trying to
figure out how detailed I need to be with my zone adjacencies. TRNSYS can do
very detailed accounting for how a zone's walls (+floors, ceilings) interact
with other zones. However, for conditioned spaces, the heat transfer is zero
when the spaces are the maintained at same temperature. My life would be a lot
easier if I could just say that the temperature on the outside of each wall
was equal to the temp setpoint, or perhaps the temp of the largest neighboring
zone, rather than do a detailed description of all interzonal adjacencies.
90.1 and The LEED Ref Guide don't seem to say anything about this. So, I'm
wondering, based on your knowledge of whatever program you use, how detailed
to I need to be? Do eQuest, Trace, energy Plus, etc, do detailed adjacency
calcs or just assume a boundary
temperature?<BR><BR>Thanks,<BR>Cramer<BR></FONT></FONT>
<DIV class=moz-signature>-- <BR><B><FONT size=1 face=Arial>J. Cramer
Silkworth<BR>Transsolar Climate Engineering<BR>Technical consulting for energy
efficiency and environmental quality in buildings.<BR>134 Spring Street, Suite
601<BR>New York, NY 10012<BR>212-219-2255<BR><A
title=mailto:silkworth@transsolar.com
href="mailto:silkworth@transsolar.com">silkworth@transsolar.com</A>
</FONT></B></DIV></BLOCKQUOTE></BODY></HTML>