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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hello!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>We are modeling a complex HVAC system with multiple gas-fired
desiccant wheels, fresh air units, and air handling units. We have had to be
rather creative to shoehorn this system into eQuest, and have basically set up
the fresh air units as VAV systems serving ghost zones and provide 39$B!k(JF outside
air to the desiccant units. The desiccant units are modeled as VAV systems
serving ghost zones and provide 80$B!k(JF fresh air to the main AHUs.(J (J The main AHUs
are modeled in the standard way but receive fresh air from the desiccant system.
The ghost zones have air walls and interior space temperature setpoints equal
to the anticipated discharge temps from the FAUs and DDs). Heating and cooling
design and control temperatures are offset by 2$B!k(JF in the ghost spaces.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The model runs and generates an output file, but then the
program crashes immediately afterward. The following Windows error message is
displayed:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><b><i><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold;font-style:italic'>The instruction at
"0x73dd11c7" referenced memory at "0x00000004". The memory
could not be "read".<o:p></o:p></span></font></i></b></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The only other time I have gotten this kind of message was
when I put a period in the file name of the model file (e.g. $B!H(J90.1 Base
Case$B!I(J), and we are not making this mistake here. We can run the model
and get results, but geez is reloading the thing annoying! Does anybody out
there have any suggestions? Could the goofiness of modeling three systems in
series be the culprit? <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>We tried using the system type $B!F(Jpackaged solid gas
desiccant$B!G(J (PSGD) but there does not appear to be a way to have the DD
unit get air from the fresh air unit and there is not a way to put pre-cooling
coils on the PSGD system. Does anyone have any suggestions about how to model
this ventilation system: FAU $B"*(J DD $B"*(J AHU?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Eric<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><u><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>
</span></font></u><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>Eric Studer, PE, LEED AP<br>
DMI<br>
<st1:Street w:st="on"><st1:address w:st="on">35 Walnut Street</st1:address></st1:Street><br>
<st1:place w:st="on"><st1:City w:st="on">Wellesley</st1:City>, <st1:State
w:st="on">MA</st1:State> <st1:PostalCode w:st="on">02481</st1:PostalCode></st1:place><br>
Ph: (781) 431-1100 ext 12<br>
Fax: (781) 431-1109<br>
e-mail: <st1:PersonName w:st="on">estuder@dmiinc.com</st1:PersonName></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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