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<DIV dir=ltr align=left><SPAN class=013135614-10092008><FONT face=Arial
color=#0000ff size=2>Julia,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=013135614-10092008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=013135614-10092008><FONT face=Arial
color=#0000ff size=2>Thank you for your comments. Please allow me to ask a
bit more.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=013135614-10092008></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=013135614-10092008><FONT face=Arial
color=#0000ff size=2>Are you stating that Table 1.8.2(b) at the bottom of
your Step 2 EAc1 template will have an energy type line item of "hot
water", "steam", or "chilled water"? If so, will the numeric energy use
value (e.g. 1,234 MBtu) be exactly the same as in Step 1's EAc1 template?
Meaning the only differences between the proposed columns of the two
submittal templates will be the dollar costs of the DES energy stream and
total costs?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=013135614-10092008></SPAN><SPAN
class=013135614-10092008><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=013135614-10092008></SPAN><SPAN
class=013135614-10092008><FONT face=Arial color=#0000ff size=2>Paul
Riemer</FONT></SPAN></DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Julia
Beabout<BR><B>Sent:</B> Wednesday, September 10, 2008 9:32 AM<BR><B>To:</B>
Karen Walkerman; Eric Youngson<BR><B>Cc:</B> bldg-sim@lists.onebuilding.org;
bldg-rate@lists.onebuilding.org<BR><B>Subject:</B> Re: [Bldg-sim] District
Thermal System<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif">
<DIV>I just finished my first DES project (not submitted yet, though) and
have a couple more in the works. </DIV>
<DIV> </DIV>
<DIV>I agree with the interpretations below especially with respect to Step 2
and the utilization of the DES purchased rates as an acceptable means of
reflecting the prposed/actual central plant's efficiency in the proposed
energy model. Although, the DES purchased rates should reflect/be
adjusted for the items Karen mentions. Additionally, I'd
recommend confirming that the DES rate includes all the central
plant's bits and pieces. The maintenance costs should also be
extracted from the DES rate if possible. (The DES document seems to
clarify that the maintenance costs do not need to be included. So, if
those can be extracted that will be more of an apples to apples comparison
with the baseline model and work in your proposed model's favor). </DIV>
<DIV> </DIV>
<DIV>In my estimation, the above method provides the most expedient,
realistic and accurate method of determining the central plant's
efficiency. The trick is that that info is not always available -
especially in a campus situation. So, in that case you may need to use
one of the other methods of modeling the central plant discussed in the DES
document: other metering data, modeling of the central plant equipment,
etc. However, sometimes even this data can be hard to come by
and/or is not within the project's ability or budget to determine or
model. So, in that type of situation, the default central plant
efficiency values provided in the DES document could be used. </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
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<DIV
style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman, new york, times, serif">-----
Original Message ----<BR>From: Karen Walkerman
<kwalkerman@gmail.com><BR>To: Eric Youngson
<ericy@pae-engineers.com><BR>Cc: bldg-sim@lists.onebuilding.org;
bldg-rate@lists.onebuilding.org<BR>Sent: Tuesday, September 9, 2008 3:08:28
PM<BR>Subject: Re: [Bldg-sim] District Thermal System<BR><BR>
<DIV dir=ltr>I am also in the middle of a DES project at the moment. The
way that I interpreted Step 1 and 2 is as follows:<BR><BR>Step
1:<BR><BR>Baseline: all downstream (on-site) equipment, envelope components,
etc, as in Appendix G. heating and cooling is purchased from a DES
system.<BR>Proposed: all downstream (on-site) equipment, envelope components,
etc, as designed. Heating and cooling is purchased from a DES
system.<BR><BR>Step 2:<BR><BR>Baseline: all equipment is modeled as
on-site. Boilers and Chillers are to be modeled as designed in Appendix
G. Utility rates are to be local utility rates<BR>Proposed: building is
to be modeled as built. Heating and cooling is purchased from a DES
system, energy costs must take into account DES production and transmission
losses.<BR><BR>In my opinion, the vocabulary in Table 1 is confusing, but the
guidelines on pages 5 and 6 seem pretty clear. Am I on the same page as
everyone else
here?<BR><BR>Thanks,<BR><BR>--<BR>Karen<BR><BR></DIV></DIV></DIV></DIV></BLOCKQUOTE></BODY></HTML>