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<DIV dir=ltr align=left><SPAN class=465233913-10032010><FONT face=Garamond>This
problem isn't completely relevant, but I didn't find anything in the archives
about it, so I figured I would pass this along in case someone finds themselves
in a similar position:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=465233913-10032010><FONT
face=Garamond></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=465233913-10032010><FONT face=Garamond>I was
working through a similar problem myself, where I had the AHU heating coils
providing heat, but not the zone reheat coils. I found that my problem was
the heating availability schedule (HEATING-SCHEDULE). </FONT></SPAN><SPAN
class=465233913-10032010><FONT face=Garamond>I originally had it set to
"S1-(YOUR SYSTEM NAME HERE) Heat Schedule", which is the zone temperature
setpoint. After much head scratching, I still kept getting 4,000
hours per year (for each zone) that the heat loads were not
met. </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=465233913-10032010><FONT
face=Garamond></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=465233913-10032010><FONT face=Garamond>The
problem is, with a VAV with reheat system, you need heating more or less all
year. So, what I was telling equest was the heating is only available
when the outside temperature is below a given value, when really you need heat
all year. So, my solution was to</FONT></SPAN><SPAN
class=465233913-10032010><FONT face=Garamond> change my heating availability
schedule (HEATING-SCHEDULE) to "Hourly Report Schedule", and the
very next simulation I had zero unmet hours. </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=465233913-10032010><FONT
face=Garamond></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=465233913-10032010><FONT face=Garamond>I
hope it helps. thanks.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=465233913-10032010><FONT
face=Garamond></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=465233913-10032010><FONT
face=Garamond>daniel</FONT></SPAN></DIV>
<DIV> </DIV>
<DIV align=left><FONT face=Garamond size=4>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt" align=left><SPAN><STRONG>Daniel
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<FONT face=Tahoma size=2><B>From:</B> equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Pasha
Korber-Gonzalez<BR><B>Sent:</B> Monday, March 08, 2010 5:55 PM<BR><B>To:</B>
eQUEST Users List<BR><B>Subject:</B> Re: [Equest-users] Fwd: no heating loads to
systems --part II<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>Dear fellow eQuest-users;</DIV>
<DIV><FONT face=Garamond></FONT> </DIV>
<DIV>With tremendous support/response from so many of you I have resolved all of
my visible issues--one due to [shameful] personal error & also with
adjusments on some schedules, heat reset control, etc. </DIV>
<DIV> </DIV>
<DIV>I can't express my THANKS loud enough for you to hear my true
appreciation of your immediate help & support. Especially since
emotionally speaking I was in a 'panic' mode b/c of my deadline and a
non-working baseline model.</DIV>
<DIV> </DIV>
<DIV>All is well now, I learned a lot of new things
about the system controls, so it was a good 'growing' experience
too. It's wonderful to have such a great support group to turn
too. I'm impessed to know that there are many
professionals & simulators who are willing to extend thier experience
and assistance to help each of us become better at what we are
doing. <BR></DIV>
<DIV>I hope I can repay the favors to all of you.</DIV>
<DIV> </DIV>
<DIV>Cheers,</DIV>
<DIV>Pasha<BR></DIV>
<DIV class=gmail_quote>On Mon, Mar 8, 2010 at 10:01 AM, Pasha Korber-Gonzalez
<SPAN dir=ltr><<A
href="mailto:pasha.pkconsulting@gmail.com">pasha.pkconsulting@gmail.com</A>></SPAN>
wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<DIV>Thanks Bill,</DIV>
<DIV> </DIV>
<DIV>I do have specified 105 supply temp, 105 hot deck max temp, 50F reheat
delta T. For some reason my results are very low for my ASHRAE baseline
building & they are showing virtually 1% heating energy consumption
overall in my building, and I have one standard effeicency boiler in the plant
side.</DIV>
<DIV> </DIV>
<DIV>This is what I know (by gut feel) the issue is--somewhere in the airside
I have either turned on or off some control or schedule--along with when I set
up the model using the wizard initial inputs they were for the proposed case
(water-to-water heat pumps-geothermal htg/clg & serving all spaces
including thermal displacement vent, natural vent zones (for htg baseboards),
FC's etc. So----I am wondering if when I saved my file for the baseline
model and then switched the plant equip (chiller/boiler) & VAV sys if
there is a carry-over input from the HPsystems (or other) that is affecting
the lack of heating energy with the standard systems.</DIV>
<DIV> </DIV>
<DIV>Not sure how to find a 'carry-over' input. I have compared my input
files with examdiff program and couldn't find anything specific.</DIV>
<DIV><FONT face=Garamond></FONT> </DIV>
<DIV>I've attached the non-corrupted files to this email...</DIV>
<DIV> </DIV><FONT color=#888888>
<DIV>pk<BR><BR></DIV></FONT>
<DIV>
<DIV></DIV>
<DIV class=h5>
<DIV class=gmail_quote>On Mon, Mar 8, 2010 at 8:54 AM, Bishop, Bill <SPAN
dir=ltr><<A href="mailto:wbishop@pathfinder-ea.com"
target=_blank>wbishop@pathfinder-ea.com</A>></SPAN> wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<DIV lang=EN-US vlink="blue" link="blue">
<DIV>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Pasha,</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">For VAV systems you
also have to specify the HEAT-SET-T (Hot Deck Max Leaving Temp) to enable
the main air handler heating coil. You can’t just leave the field blank. For
example, if your <SPAN>room supply</SPAN> air temperature is 90F and you
have 30F reheat, enter 60F for the hot deck temp.</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Regards,<BR>Bill</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<DIV>
<P class=MsoNormal><B><FONT face="Franklin Gothic Medium" color=black
size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Franklin Gothic Medium'">William
Bishop, EIT, LEED<SUP>®</SUP> AP </SPAN></FONT></B><B><FONT
face="Franklin Gothic Medium" color=#006600 size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: #006600; FONT-FAMILY: 'Franklin Gothic Medium'">|</SPAN></FONT></B><B><FONT
face="Franklin Gothic Medium" color=black size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Franklin Gothic Medium'">
</SPAN></FONT></B><B><FONT face="Franklin Gothic Medium" color=black
size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Franklin Gothic Medium'">Pathfinder
Engineers & Architects LLP</SPAN></FONT></B><B><FONT
face="Franklin Gothic Medium" color=black size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Franklin Gothic Medium'"></SPAN></FONT></B></P>
<P class=MsoNormal><FONT face=Arial color=black size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial">Mechanical
Engineer</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=black size=1><SPAN
style="FONT-SIZE: 5pt; COLOR: black; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal><FONT face=Arial color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy; FONT-FAMILY: Arial">134 South Fitzhugh
Street</SPAN></FONT><FONT color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy"><BR></SPAN></FONT><FONT face=Arial
color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy; FONT-FAMILY: Arial">Rochester</SPAN></FONT><FONT
face=Arial color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy; FONT-FAMILY: Arial">, NY
14608</SPAN></FONT><FONT color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy"><BR></SPAN></FONT><FONT face=Arial
color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy; FONT-FAMILY: Arial">T: (585) 325-6004
</SPAN></FONT><FONT face=Arial color=black size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial">Ext.
114</SPAN></FONT><FONT color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy"><BR></SPAN></FONT><FONT face=Arial
color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy; FONT-FAMILY: Arial">F: (585)
325-6005</SPAN></FONT><FONT face=Arial color=black size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial"></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=black size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial"><A
href="mailto:wbishop@pathfinder-ea.com"
target=_blank>wbishop@pathfinder-ea.com</A></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=black size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial"><A
href="http://www.pathfinder-ea.com/"
target=_blank>www.pathfinder-ea.com</A></SPAN></FONT><FONT color=navy><SPAN
style="COLOR: navy"></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Webdings color=green size=5><SPAN
style="FONT-SIZE: 18pt; COLOR: green; FONT-FAMILY: Webdings">P</SPAN></FONT><FONT
color=green><SPAN style="COLOR: green"> </SPAN></FONT><FONT color=green
size=1><SPAN style="FONT-SIZE: 7.5pt; COLOR: green">Please strive to live
sustainably.</SPAN></FONT><FONT color=navy><SPAN
style="COLOR: navy"><SPAN>
</SPAN></SPAN></FONT><FONT color=green><SPAN
style="COLOR: green"></SPAN></FONT></P></DIV>
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
<HR align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> <A
href="mailto:equest-users-bounces@lists.onebuilding.org"
target=_blank>equest-users-bounces@lists.onebuilding.org</A> [mailto:<A
href="mailto:equest-users-bounces@lists.onebuilding.org"
target=_blank>equest-users-bounces@lists.onebuilding.org</A>] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Pasha Korber-Gonzalez
<DIV><BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Monday, March
08, 2010 10:30 AM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> John
Aulbach<BR><B><SPAN style="FONT-WEIGHT: bold">Cc:</SPAN></B> eQUEST Users
List<BR></DIV><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re:
[Equest-users] Fwd: no heating loads to systems --part II</SPAN></FONT>
<P></P>
<P></P>
<P></P></DIV>
<DIV>
<DIV></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Thanks John/Vik- Yes. but when I do put in reheat
that is the only way the systems are receiving reheat, so my question is
why are the heating coils not doing the primary heating wherefore in my
case file, all of the heating is up to either reheat (specified by me) or
via baseboards (also specified by me.) </SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Garamond size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">The big question is: why aren't the heating
coils doing the job first, and then the excess is to be made up via reheat
and/or baseboards.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">I have not specified any input for humidty control
(based on the help file recommendations--b/c we don't have humidification
control in the proposed building...</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">The DOE2 help file
indicates:</SPAN></FONT></P></DIV>
<H5><B><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt">REHEAT-DELTA-T</SPAN></FONT></B></H5>
<P><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Maximum
increase in temperature for supply air passing through the zone (or subzone)
reheat coils. The value specified here applies to all zones in the system.
<SPAN style="BACKGROUND: #ffff66">This keyword is required in order to
simulate heating the air as it passes through the terminal reheat
coil.</SPAN> Note that when very little air is passed (see MIN-FLOW-RATIO)
there may be insufficient reheating.</SPAN></FONT></P>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">The highlighted statement is noted, but it still
doesn't indicate that this input is required <U>in order to simulate any
heating requirement.</U> It only states it is required to simulate
reheat heating requirements. Why don't the heating coils work in my
model is my "black & white" question.... all in all my space
heating energy (with reheat & baseboards) is only 1% of the total
building energy for a climate in Vancouver, BC... why is it so
low?</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">...if I am just really missing something---please
don't hesitate to tell me so. ---- I have also specified the hot deck
temp coming off the htg coils which then gave me some capacity in my heating
coils, but unfortunately by adding this input all of my numbers have
dropped instead of increased.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">I also looked back into the archives to find an
answer to this issue--I found two others who were having the same problems I
have, but they have responded that they never figured out the problem
either...</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Pasha</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">On Sat, Mar 6, 2010 at 10:34 PM, John Aulbach <<A
href="mailto:jra_sac@yahoo.com" target=_blank>jra_sac@yahoo.com</A>>
wrote:</SPAN></FONT></P>
<DIV>
<DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Pasha:</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">I believe the short answer to this is that not all
VAV zones have reheat. Therefore, you need to put reheat in the zones that
have it. otherwise, all systems would get reheat.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">John Aulbach</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">
<HR align=center width="100%" SIZE=1>
</SPAN></FONT></DIV>
<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> Pasha
Korber-Gonzalez <<A href="mailto:pasha.pkconsulting@gmail.com"
target=_blank>pasha.pkconsulting@gmail.com</A>><BR><B><SPAN
style="FONT-WEIGHT: bold">To:</SPAN></B> eQUEST Users List <<A
href="mailto:equest-users@lists.onebuilding.org"
target=_blank>equest-users@lists.onebuilding.org</A>>; Vikram Sami <<A
href="mailto:vsami@lasarchitect.com"
target=_blank>vsami@lasarchitect.com</A>><BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Sat, March 6, 2010 9:30:09
PM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [Equest-users]
Fwd: no heating loads to systems --part II</SPAN></FONT></P>
<DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Thank you both for looking at this. I'm a bit
dumbfounded that it can't be as easy as the fact that I need to specify
reheat, since I have indicated that it is a VAV with reheat system, but if
that is the case then I will re-instate the reheat delta t so that I can
generate heating energy. (when I had input a reheat delta t of
30 degrees F, I was able to successfully fun a simulation, but the heating
energy numbers where so high (i.e. 30 kWH/sq ft or more) that it just didn't
seem like this was the correct input for my model.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">I just think that it is a bit weird even for the
programming that the only way I can get heat out of the heating coil is that
I have to enlist reheat or baseboards in order for the system to assume
that there is a heating load.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">I understand the logic of why this works, but I
don't understand why it is a requirement in DOE to have some or ll of the
heating capacity specified for it to "autosize" or react to the fact that
heating loads need to be passed to the systems module only if reheat or
baseboards are specified.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">If it is possible for any of the eQuest programmers
to comment on this input requirement I would like to hear thier
feedback. In the meantime, what I am understanding is that it
is a requirement to specify supplementary heating (i.e reheat or
baseboards) in DOE2 for a VAV reaheat system before DOE2 will allow a
basic heating coil to assume a heating load...somebody please tell me I'm
wrong-because this doesn't make sense.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">Pasha</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">---------- Forwarded message
----------<BR>From: <B><SPAN style="FONT-WEIGHT: bold">Seun
Odukomaiya</SPAN></B> <<A href="mailto:sodukomaiya@laceindy.com"
target=_blank>sodukomaiya@laceindy.com</A>><BR>Date: Sat, Mar 6, 2010 at
4:59 PM<BR>Subject: RE: [Equest-users] no heating loads to systems --part
II<BR>To: Pasha Korber-Gonzalez <<A
href="mailto:pasha.pkconsulting@gmail.com"
target=_blank>pasha.pkconsulting@gmail.com</A>><BR><BR></SPAN></FONT></P>
<DIV>
<DIV>
<P class=MsoNormal><FONT face=Tahoma color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Tahoma">Pasha,</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">I took a look at your model.
When employing a VAV-Reheat System as you have in your model, you must also
specify the reheat Delta-T for the zone heating coils attached to the units
(see attached screenshot). If this is not done, the program assumes that the
zones have no reheat, and thus will never put a load on your hot water
loop. This, in turn, causes the error that you've seen. The
DOE-2 documentation describes it as follows:</SPAN></FONT></P></DIV>
<DIV>
<P><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
<P><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Maximum
increase in temperature for supply air passing through the zone (or subzone)
reheat coils. The value specified here applies to all zones in the system.
This keyword is required in order to simulate heating the air as it passes
through the terminal reheat coil. Note that when very little air is passed
(see MIN-FLOW-RATIO) there may be insufficient reheating.</SPAN></FONT></P>
<P><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
<P><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">According to your model, the
maximum zone entering supply air temperature is 105 degrees. I also noticed
that your zone minimum entering supply temperature is 55 degrees. As such,
you need to specify your reheat delta-T as 50 degrees (as in the
screenshot). This ensures that your zone coils are able to raise the
55-degree air from the AHU up to the 105 degrees that you have
specified. Try that, and your model should run just fine.</SPAN></FONT></P>
<P><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
<P class=MsoNormal><B><FONT face="Times New Roman" color=navy size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: navy">Seun
Odukomaiya, LEED AP - </SPAN></FONT></B><I><FONT color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-STYLE: italic">Mechanical
Engineer</SPAN></FONT></I></P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy">L'Acquis
Consulting Engineers</SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy">9229 Delegates Row, Suite
550</SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy">Indianapolis</SPAN></FONT><FONT
color=navy size=1><SPAN style="FONT-SIZE: 9pt; COLOR: navy">, Indiana
46240</SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy">voice: (317) 706-2075, ext.
255</SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy">fax: (317)
706-2076</SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy">email: <A
href="mailto:sodukomaiya@laceindy.com"
target=_blank>sodukomaiya@laceindy.com</A></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Tahoma">web: <A
href="http://www.laceindy.com/"
target=_blank>www.laceindy.com</A></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Webdings color=green size=5><SPAN
style="FONT-SIZE: 18pt; COLOR: green; FONT-FAMILY: Webdings">P</SPAN></FONT><B><FONT
color=green size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; COLOR: green">
</SPAN></FONT></B><B><FONT color=green size=1><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 8pt; COLOR: green">Please consider the
environment before printing this e-mail.</SPAN></FONT></B></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">
<HR align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> <A
href="mailto:equest-users-bounces@lists.onebuilding.org"
target=_blank>equest-users-bounces@lists.onebuilding.org</A> [<A
href="mailto:equest-users-bounces@lists.onebuilding.org"
target=_blank>equest-users-bounces@lists.onebuilding.org</A>] On Behalf Of
Pasha Korber-Gonzalez [<A href="mailto:pasha.pkconsulting@gmail.com"
target=_blank>pasha.pkconsulting@gmail.com</A>]<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Saturday, March 06, 2010 4:26 PM
</SPAN></FONT></P>
<DIV>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><BR><B><SPAN
style="FONT-WEIGHT: bold">To:</SPAN></B> eQUEST Users List<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> [Equest-users] no heating
loads to systems --part II</SPAN></FONT></P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Hi all,</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">okay-I'm back to where I was last time I posted this
question: why are there no heating loads being passed to my
systems?</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Here's the story: (160,000 sf high school
building)</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">The attached file is my baseline 90.1 model using
System 7 (VAV w/reheat)</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">As the file is now-I have removed the reheat delt-T
(30 deg), and removed any baseboard heating in all /systems/zones and
removed any input of heating capacity of the coils. With this, my file
receives the following error:</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Courier New" size=1><SPAN
style="FONT-SIZE: 7.5pt; FONT-FAMILY: 'Courier New'">***ERROR***********************************************************************</SPAN></FONT></P></DIV>
<DIV>
<P><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Loop:
Hot Water Loop has zero design flow.</SPAN></FONT></P>
<P><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Check
input for consistency,<SPAN style="BACKGROUND: #ffff33"> or specify design
loads.</SPAN></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Right now I am trying to have DOE2 'autosize'
anything it can so that I can get a good run and go back and adjust
equipment capacities....but I don't know where else I can look
further for why the systems aren't receiving the design loads.---thus
creating the above error. Something is stopping DOE from passing the
loads to the systems. When I open my sim file, the only reports being
produced are the L-reports. </SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">If anyone has any hints or can take a look to find
what it is I'm missing--I know it's a simple thing, but can't seem to find
why it is doing this. (I've been staring at these files tooo
long...)</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">---on a side note--after all the help I received
with this issue earlier this week I have input all of the temp schedules
that are required, and all that I know needs to be input to get the systems
to run. any help would be greatly appreciated so I don't have to go
back and rebuild this model from the beginning....I'm too close to the end
to go back and rebuild another file.</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Thanks in advance!</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Pasha</SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV></DIV></DIV></DIV></DIV></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV></DIV></DIV></DIV></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV></DIV></DIV></DIV></BLOCKQUOTE></DIV><BR></DIV></DIV></BLOCKQUOTE></DIV><BR></BODY></HTML>