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<font face="Times New Roman, Times, serif">I would think the difference
is in your ventilation. Your proposed seems to be bringing in much
more outside air.<br>
Bruce<br>
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On 03/03/2010 08:10 AM, Karen Walkerman wrote:
<blockquote
cite="mid:69a9bc0a1003030510y332ebf20pe127da3e0e9be7f@mail.gmail.com"
type="cite">with the VAV system, it is likely that your boiler is
being used to re-heat cool air. This can account for significant
additional boiler energy use, as well as boiler energy use in the
summer. If this is an Appendix G baseline, take a look at the controls
required for water temperature. Also, due to the high increase in
boiler energy use between the proposed and baseline, I'm guessing there
may be a space that requires significant cooling all year. If this is
the case, you may be required to provide a separate cooling system for
this space.
<div><br>
</div>
<div>--</div>
<div>Karen <br>
<br>
<div class="gmail_quote">On Wed, Mar 3, 2010 at 6:33 AM, Paul S. <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:sep.paul@gmail.com">sep.paul@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">I've
got the result of the end use between baseline and proposed<br>
design, everything seems logical except the boilers consumption.<br>
Boilers are the same type in the baseline and proposed design.<br>
<br>
Boilers in the baseline are sized by eQUEST, in the proposed boilers<br>
are given calculated by the engineers.<br>
<br>
The only difference is in the proposed design we used air-cooled<br>
chillers and FCU and for the baseline water-cooled and packaged VAVs.<br>
<br>
Any suggestion about this difference in BTU consumption. And why in<br>
baseline desing in June July we have BTU consumption while in the 2<br>
designs have same temperatures and same schedules.<br>
<br>
thanks<br>
<br>
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