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<DIV><SPAN class=963345512-28082002><FONT face=Arial color=#0000ff size=2>Thanks
for your helpful response.. </FONT></SPAN></DIV>
<DIV><SPAN class=963345512-28082002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=963345512-28082002><FONT face=Arial color=#0000ff size=2>At the
moment we analyze buildings during the schematic phase of the project to compare
envelope, systems & plant alternatives. So we don't go into the
details that you describe but we might have to in the future to show compliance
with energy conservation codes before submitting construction documents.
We model hotels the way architects design it during the schematic phase with
modifications to eliminate the details but keeping the design intent
intact. This means the different space types (meeting rooms, gymnasiums,
indoor swimming pools, laudry, restaurants, lobbies, etc.) and area
configurations requiring different design criteria and systems requirements
are maintained. There is no problem using DOE2.1E for hotels since the
rooms are served by FCUs or induction units with heating and cooling
coils. In the case of FCUs the outdoor air is supplied to the corridor and
transferred to the room. There is only one exhaust system <SPAN
class=931472413-28082002>in a hotel </SPAN>for the bathroom which can be
modelled in DOE2.1E. So DOE2.1E can handle hotels. In the case
of high rise apartment buildings there can be 3 exhaust systems (bathroom,
kitchen & dryer) with different air quantities and operating
schedules. At the moment we have to treat the exhaust systems as
one system and use the weighted average values of the operating profile
fractions. </FONT></SPAN></DIV>
<DIV><SPAN class=963345512-28082002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=963345512-28082002><SPAN class=931472413-28082002><FONT
face=Arial color=#0000ff size=2>We also have a solution for dealing with the
other issues that I raised. They were (1) varying the outdoor air based on
occupancy (using CO2 sensors) independently of the supply air in a VAV system
and (2) under-floor air distribution versus ceiling air distribution. I
was interested in finding out how others handled these situations. DOE2.1E
also does not allow duplicate systems using the LIKE/EXCEPT keywords. This
is awkward when dealing with floor by floor airhanding units in a high-rise
buildings with two or more units per floor and served by one or
more separate outdoor air handling units</FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=963345512-28082002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=963345512-28082002><FONT face=Arial color=#0000ff size=2>Thanks
again for your response.</FONT></SPAN></DIV>
<DIV><SPAN class=963345512-28082002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=963345512-28082002><FONT face=Arial color=#0000ff
size=2>Varkie</FONT></SPAN></DIV>
<DIV><SPAN class=963345512-28082002></SPAN><FONT
face=Tahoma><BR></FONT></DIV></DIV>
<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> Aulbach, John
[mailto:JAulbach@semprasolutions.com]<BR><B>Sent:</B> Tuesday, August 27, 2002
3:15 PM<BR><B>To:</B> Bldg-sim@gard.com<BR><B>Subject:</B> [Bldg-sim]
Apartment/hotel DOE-2.1E systems.<BR><BR></FONT></DIV>
<DIV><SPAN class=225101720-27082002><FONT face=Arial color=#0000ff
size=2>Always glad to help a fellow Chicagoan. Even though I now live in
California.</FONT></SPAN></DIV>
<DIV><SPAN class=225101720-27082002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=225101720-27082002><FONT face=Arial color=#0000ff size=2>Back
in the days I did energy modeling for Hilton Hotels, I would always divide the
hotel Guest Tower up into several levels of occupancy. Since only one side of
a typical hotel room faces the external (solar/transmission) and hotels rooms
usually have drapes closed, I didn't worry too much about outdoor fenestration
or transmission conditions versus the effect of internal load and, of course,
outside air on the room.</FONT></SPAN></DIV>
<DIV><SPAN class=225101720-27082002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=225101720-27082002><FONT face=Arial color=#0000ff size=2>I
then divided the hotel guest rooms up into three or four (as many as six)
occupied levels, as hotel occupancies are roller coasters of conventions,
holiday periods, and every else in between. I made a group of guest rooms
fully occupied, and a group partially occupied, and a third group lightly
occupied (assuming a three way division).</FONT></SPAN></DIV>
<DIV><SPAN class=225101720-27082002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=225101720-27082002><FONT face=Arial color=#0000ff size=2>I
then chose the FOUR PIPE INDUCTION system for my HVAC. This system allows for
Primary AND Secondary heating and cooling coils. The Primary coils would
temper the outside airflow, and the secondary would attack the combination of
the primary tempered and the induced room air. The Induction ratio became the
ratio of all fan coil airflow (say 500 guest room x 200 CFM/fan coil) to the
total outside air.</FONT></SPAN></DIV>
<DIV><SPAN class=225101720-27082002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=225101720-27082002><FONT face=Arial color=#0000ff size=2>This
is direct ventilation of the guest rooms and/or the corridor are pulled into
the guest room and further treated by the fan coils. And exhaust air is
permitted in this SYSTEM-TYPE.</FONT></SPAN></DIV>
<DIV><SPAN class=225101720-27082002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=225101720-27082002><FONT face=Arial color=#0000ff size=2>High
rise apartment living areas can be handled in the same way.
</FONT></SPAN></DIV>
<DIV><SPAN class=225101720-27082002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=225101720-27082002><FONT face=Arial color=#0000ff size=2>I
thank Bruce Birdsall, one of the original DOE-2 developers at Lawrence
Berkeley Labs for teaching me this trick.</FONT></SPAN></DIV>
<DIV><SPAN class=225101720-27082002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=225101720-27082002>
<DIV><FONT color=#0000ff size=4><STRONG>John R. Aulbach, PE,
CEM</STRONG></FONT></DIV>
<DIV><FONT size=2><STRONG>Project Engineer</STRONG></FONT></DIV>
<DIV><FONT size=2><STRONG>Sempra Energy Solutions</STRONG></FONT></DIV>
<DIV><FONT size=2><STRONG>555 West Fifth Street</STRONG></FONT></DIV>
<DIV><FONT size=2><STRONG>Mail Location 27F3</STRONG></FONT></DIV>
<DIV><FONT size=2><STRONG>Los Angeles, CA 90013</STRONG></FONT></DIV>
<DIV><FONT size=2><STRONG>Tel: (213) 244-8551 Beeper (888)
520-1051</STRONG></FONT></DIV>
<DIV><STRONG><FONT size=2></FONT></STRONG> </DIV>
<P align=left><B><FONT face="Courier New" size=1>"Sempra Energy Solutions is
not the same company as SDG&E/ SoCalGas, the Utilities. Sempra
Energy Solutions is not regulated by the California Publi</FONT><FONT
face="Courier New" size=1>c Utilities Commission, and you do not have to buy
Sempra Energy Solutions products or services to continue to receive quality
regulated service from the Utilities." </FONT></B></P></SPAN></DIV><PRE>
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