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<DIV dir=ltr align=left><SPAN class=287243314-03092010><FONT color=#0000ff
size=2 face=Arial>Nick,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=287243314-03092010><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=287243314-03092010><FONT color=#0000ff
size=2 face=Arial>I have put together a number of hotel models, like you are
discussing, where I modeled all the rooms on like 15 floors with the same
exposure all together. Of course the top floor and the ground floor were
split off and modeled independently, since they have different exposures.
Also, the corner rooms, with four different exposures, for the most
accurate modeling, can be split off and modeled separately. The internal
heat gains should be similar on all these rooms to model properly. I added
up all the CFM's, KW fan loads, outside air, and the heating and cooling
capacity of the equipment for all the rooms all together. These
models modeled accurately compared to actual historical energy use data of the
hotels.</FONT></SPAN></DIV>
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size=2 face=Arial></FONT></SPAN> </DIV>
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<DIV align=left>
<DIV align=left><STRONG><EM><FONT color=#0000ff size=6
face="Bradley Hand ITC">David A. Bastow </FONT></EM></STRONG></DIV>
<DIV align=left><STRONG><EM><FONT face="Rockwell Extra Bold">McClure
Engineering, Inc.
</FONT></EM></STRONG></DIV></DIV></FONT></SPAN></DIV><BR>
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<FONT size=2 face=Tahoma><B>From:</B> equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Nicholas
Lander<BR><B>Sent:</B> Thursday, September 02, 2010 9:51 PM<BR><B>To:</B>
equest-users@lists.onebuilding.org<BR><B>Subject:</B> [Equest-users] Equest, fan
coils and Ashrae<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr><FONT class=Apple-style-span
face="verdana, sans-serif">Folks,</FONT>
<DIV><FONT class=Apple-style-span face="verdana, sans-serif">This may be a
stupid question but it has me stumped. I'm primarily concerned with fan coil
units, but any HVAC system raises similar issues:</FONT></DIV>
<DIV><FONT class=Apple-style-span face="verdana, sans-serif"><BR></FONT></DIV>
<DIV><FONT class=Apple-style-span face="verdana, sans-serif">ASHRAE Appendix G
lets you group zones together into thermal blocks as long as they have the same
HVAC systems and loads and orientation. So, for example, hotel rooms can be
grouped as each is identical to the next. The question is, how do you model the
HVAC of this thermal block?</FONT></DIV>
<DIV><FONT class=Apple-style-span face="verdana, sans-serif"><BR></FONT></DIV>
<DIV><FONT class=Apple-style-span face="verdana, sans-serif">For example, hotel
rooms use fan coil units for cooling. A single FCU uses X-amount of energy based
on fan size and pressure drop. So how do you accurately model fan energy when
grouping several zones, and hence several FCUs, together?</FONT></DIV>
<DIV><FONT class=Apple-style-span face="verdana, sans-serif"><BR></FONT></DIV>
<DIV><FONT class=Apple-style-span face="verdana, sans-serif">Thanks</FONT></DIV>
<DIV><FONT class=Apple-style-span
face="verdana, sans-serif">Nick</FONT></DIV></DIV></BODY></HTML>