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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I’m having a problem with unmet throttling hours, and
I can’t find any way to remedy it. I’d appreciate any help anyone
can offer.<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>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Building Description: A school with an air cooled chiller,
boilers, 5 ahu’s with hot and cold coils, and hw reheat at the VAV boxes.
The model also has baseboards in a few spots and a run around energy recovery
on each AHU. <o:p></o:p></span></font>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am working on an energy model put together by someone who
no longer works here. When I run the simulation on his model, I get about 76%
of the hours outside of throttling range, all cooling. Following advice I’ve
found in the archives, I increase my throttling range from 2 to 6 degrees. That
brings the hours out of throttling range down to 34%, again all cooling. Night
fan control is set to cycle on any. Increasing the sizing factor from 1.25 only
help very minimally (1-2 % points). I’ve been messing around with the
model, trying different strategies for days and can’t get it in an
acceptable range. I’ve attached the project files if anyone could take a
look at it.<o:p></o:p></span></font>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>My biggest problem is when the system is sized per the
calculated loads, how am I getting so many hours where the system is not
meeting the loads.<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>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Anyway, thanks.<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>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Pat Furey<o:p></o:p></span></font>
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