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 href="mailto:sep.paul@gmail.com">sep.paul@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;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>
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