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--></style></head><body lang="EN-US" link="blue" vlink="purple" style><div class="WordSection1"><p class="MsoNormal">Hi,</p><p class="MsoNormal"> </p><p class="MsoNormal">This question may have been discussed in length somewhere else but I was not able to find it.</p>
<p class="MsoNormal"> </p><p class="MsoNormal">I am working on a mixed use dormitory. There is a restaurant, coffee shop and university store/gift shop on the first few floors and private rooms and suites on the upper floors. The building is DX cooling and gas heating. Based on these conditions I have system 1 and system 3 for the baseline, system one for the private rooms, system 3 for the other spaces.</p>
<p class="MsoNormal"> </p><p class="MsoNormal">Looking at section G3.1.2.9 in ASHRAE 90.1 there are two different equations for fan power consumption. For systems 1 & 2, it’s CFM * 0.3, for systems 3-8, it’s a slightly more complicated equation. However, after performing the calculations I’m getting roughly CFM * 0.9. If I’m interpreting this right it means that fan power consumption for systems 1 & 2 is 3 times less than that for systems 3-8.</p>
<p class="MsoNormal"> </p><p class="MsoNormal">It’s not impossible that a split system, or system 1 type system, could be installed in the other areas of the building, the mechanical contractor has proposed as much for budgetary reasons. This would mean that the baseline system could potentially use as much as 3 times as much energy as the proposed system, and only because of the ASHRAE fan power consumption equations.</p>
<p class="MsoNormal"> </p><p class="MsoNormal">Is there a reason why there is such a large difference between the two equations? Or is my classification of the spaces and interpretation of the equations off?</p><p class="MsoNormal">
</p><p class="MsoNormal">Thanks!</p><p class="MsoNormal"> </p><p class="MsoNormal"><span style><img width="189" height="63" id="Picture_x0020_1" src="cid:image001.png@01CF2315.70E5FDC0" alt="cid:image003.png@01CDAB78.6524ACE0"></span></p>
<p class="MsoNormal" style="background:white"><b><span style="font-size:10.0pt;font-family:"Century Schoolbook","serif";color:black">Ben Hollon, EIT, LEED</span></b><span style="font-size:14.0pt;color:#002060">®</span><b><span style="font-size:10.0pt;font-family:"Century Schoolbook","serif";color:black"> AP BD+C, MBA</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:9.0pt;font-family:"Century Schoolbook","serif";color:black">email: bhollon</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"><a href="mailto:xxxxxx@antella-inc.com"><span style="font-size:9.0pt;font-family:"Century Schoolbook","serif";color:blue">@antella-inc.com</span></a></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:9.0pt;font-family:"Century Schoolbook","serif";color:black">Cell (816) 536-3434</span><span style="font-size:10.0pt;font-family:"Century Schoolbook","serif";color:black"> </span><span style="font-size:10.0pt;font-family:"Century Schoolbook","serif";color:maroon">•</span><span style="font-size:10.0pt;font-family:"Century Schoolbook","serif";color:black"> </span><span style="font-size:9.0pt;font-family:"Century Schoolbook","serif";color:black">Tele: (816) 421-0950 ext. 104</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222"></span></p>
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