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Hi,<br>
<br>
I am currently modeling a library building with large open book stack
spaces. The baseline system is System 5 Packaged VAV w/ reheat.
systems According to ASHRAE 90.1 Appendix G3.1.3.13, I have to model
the minimum VAV flow setpoint as 0.4 cfm/sq.ft. The problem is that
since these interior stack areas have almost no internal loads other
than lighting, the design cfm/sq.ft is less than 0.3 cfm/sq.ft. When I
run the simulation using Carrier HAP, the system CFM is much larger
than is should be as it is now based on the 0.4 cfm/sq.ft rather than
the calculated loads. <br>
<br>
For example, 6300 sq. ft. Stacks Rm. 300 calculated cfm based on load
is 1245 cfm (0.2 cfm/sq.ft). Since this is less than 0.4 cfm/sq.ft, the
simulation results in a much higher 2520 cfm<br>
<br>
I realize that this can only help my LEED energy savings calculation,
but am I doing this correctly?<br>
<br>
Thanks,<br>
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<p align="left"><b><font color="#002d56" face="ArialMT">———————————————————————————<br>
</font><font color="#002d56" face="ArialMT" size="2">Allan Fox, P.E.
CBCP, LEED AP</font></b><font color="#002d56" face="ArialMT" size="2"><br>
Senior Mechanical Engineer
<br>
<a href="mailto:afox@osborn-eng.com">afox@osborn-eng.com</a></font></p>
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ENGINEERING<br>
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