Lawrin,<br><br>In the baseline model, you have zero outside air which is why the heating energy is so low. You have specified that you're pulling OA from another system, which appears to be an artifact from setting up a DOAS for the Proposed model perhaps? Restore default on that input.<br>
<br>Also, when I ran the models in eQUEST the Proposed used 634,370 kWh/yr and the Baseline used 690,870 kWh/yr, so I'm not sure where the 1/63rd of the energy use was coming from.<br><br><br clear="all">Kendra Tupper, PE, LEED AP<br>
Senior Consultant<br>Built Environment Team<br><br>Rocky Mountain Institute | T 303-567-8641 | F 303-245-7213 | <a href="http://www.rmi.org">www.rmi.org</a><br>
<br><br><div class="gmail_quote">On Wed, Feb 24, 2010 at 2:27 AM, Ellis, Lawrin <span dir="ltr"><<a href="mailto:lawrin.ellis@tlc-eng.com">lawrin.ellis@tlc-eng.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;">
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<p class="MsoNormal">Good morning All.</p>
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<p class="MsoNormal">We are modeling a two-story college classroom building in
Fort Myers, Florida. Per ASHRAE 90.1-2004 App'x G, Table G3.1.1A, the
baseline building is modeled using System 4, PSZ-HP. The proposed design
is chilled water VAV with electric strip heat. We have completed numerous
models comparing these system types previously using VisualDOE with results, as
expected, showing the baseline building consuming approximately 1/3 (or
slightly less) of the energy used by the proposed design. However, as
modeled in eQUEST, when comparing the baseline building heating energy to the
proposed design, results show the baseline building using approximately 1/63rd
of the heating energy used by the proposed design. Internal loads are
almost identical in both the proposed and baseline models. The outdoor
air flow and humidity controls are identical in each model. Also, comparing
peak design conditions in the simulation output shows the baseline building
losing heat at approximately twice the rate of the proposed design. We
are at a loss trying to determine why the heating energy is virtually
non-existent in the baseline model.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Models are attached for reference. Any insight or
assistance is greatly appreciated. Thanks in advance and kind regards,</p>
<p class="MsoNormal"><b>Lawrin T. Ellis, PE </b></p>
<p class="MsoNormal"><span style="font-size: 10pt;">LEED AP, CxA</span></p>
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