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<p class=MsoNormal>Something new occurred to me this week and I’d love to
hear others’ thoughts!<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>LEED prescribes baseline/proposed energy models to follow
ASHRAE 90.1 with a caveat: the “process energy costs” must
total 25% of the baseline energy costs. By extension, 90.1 requires the
same loads/schedules be applied to the proposed model as they have to match.
As an aside, the LEED EAc1 templates appear to calculate/check this using
process energy consumption (not cost), but that’s not what I’m
getting at…<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I just had a typical case where I had to inflate the baseline
internal miscellaneous equipment loads to get to 25%. These additional
loads were substantial enough that when applied to the proposed model/design, I
ran into many unmet cooling hours for the equipment capacities entered. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Then I realized: We can define additional equipment electricity
loads but simultaneously apply a multiplier (in eQuest anyway – I expect this
is feasible other programs also) to reduce/negate the corresponding heat load
contributions. This results in the energy consumption/costs showing up
correctly in the final results/reports, but does not artificially inflate the
internal loads that the baseline/proposed systems must handle.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Would this practice (which incidentally can be a time saver)
of accounting for extra process/miscellaneous loads without extra thermal
contributions be in line with the intent of ASHRAE/USGBC? It would still normalize
the otherwise unstandardized process consumption/costs of the baseline/proposed
models between different building types…<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>On the other hand, if it really is the intent of USGBC to
add arbitrary additional internal heat loads to our models that our actual designs
were not designed and sized for, does it follow that we should allow the
proposed models to autosize cooling equipment/fan capacities and not specify
them (this would seem incongruous with 90.1 to me)?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>~Nick<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><img width=119 height=37 id="Picture_x0020_1"
src="cid:image001.jpg@01CAE857.87E549B0" alt="cid:489575314@22072009-0ABB"><b><span
style='font-family:"Stylus BT","sans-serif";color:#2D4D5E'><o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-family:"Stylus BT","sans-serif";
color:#2D4D5E'><o:p> </o:p></span></b></p>
<p class=MsoNormal><b><span style='font-family:"Stylus BT","sans-serif";
color:#2D4D5E'>NICK CATON, E.I.T.</span></b><b><span style='font-size:12.0pt;
font-family:"Stylus BT","sans-serif";color:#2D4D5E'><o:p></o:p></span></b></p>
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<p class=MsoNormal><span style='font-size:10.0pt;color:#2D4D5E'>fax 913
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<p class=MsoNormal><i><span style='font-size:10.0pt;color:#2D4D5E'>Check out
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<p class=MsoNormal><o:p> </o:p></p>
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