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<font size="+1"><tt>You need to tune your system better. You are
getting conflicts with your spaces which the system can't handle
yet. Look at your airflow per SF to start with. You probably
have your terminal system handling too much of the load. Your
cfm/SF is probably set at the default value of 0.5 cfm/SF.
Start increasing it say in increments of 0.25. You will see the
load shifting back to the AHU and your unmet hours decreasing.
This is an energy penalty so more is not necessarily better.
Also you could loosen up your throttling ranges a little as
well, they are fairly tight in eQuest. As you can see you can
get rid of the unmet hours with a big energy pig of a system,
the skill is to tune it just right.<br>
</tt></font><font size="+1"><tt>Bruce Easterbrook P.Eng.<br>
Abode Engineering</tt></font><br>
<br>
On 11/04/2012 03:12 AM, Neeraj Arora wrote:
<blockquote
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<p class="MsoNormal">Dear friends,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am doing an energy model and getting few
unmet hours in heating. The air side system type is a Variable
Air Volume and electric heating at system as well as at zone
level. The water side is water cooled chillers with VFD
secondary pumping. <o:p></o:p></p>
<p class="MsoNormal">If I change the system type from VAV to
Reheat Fan system, the unmet hours are gone but the model
shows huge space heating consumption, which is not acceptable
as per the location of the building. The building is located
in New Delhi (India).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have tried everything possible to either
remove the unmet hours or the space heating consumption but
one goes and the other one comes.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is there any way to remove unmet heating
hours and the space heating consumption simultaneously? I have
used New Delhi weather file.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Anyone please help me out to resolve the
problem.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks in advance.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Neeraj Arora<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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