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<div><span class="514111018-16092009"><font color="#0000ff"><font face="Arial" size="2"><span class="466500520-16092009">a office building conditioned through the use of the following systems:</span></font></font></span></div>
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Arial" color="#0000ff" size="2"><span class="130593719-15092009"><strong><span class="514111018-16092009"></span></strong></span></font></p>
<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Arial"><font size="2"><font color="#0000ff"><span class="130593719-15092009"><strong>System 1</strong></span> is a ventilation only system that conditions the OA to 72 degree F.
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Arial"><font size="2"><font color="#0000ff"><span class="130593719-15092009"><strong>System 2 </strong></span>is a cooling only <span class="130593719-15092009">VAV
</span><span class="130593719-15092009">air handling </span>system that cools the<span class="466500520-16092009"> building's return</span> air to 55 degree F<span class="130593719-15092009">
</span><span class="130593719-15092009">(</span><strong>This system <span class="130593719-15092009">has</span> an economizer mode).</strong>
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Arial"><font size="2"><font color="#0000ff"><span class="466500520-16092009">THE TRICKY PART:
</span>The two <span class="yshortcuts" id="lw_1253043447_1" style="BACKGROUND: none transparent scroll repeat 0% 0%; CURSOR: hand; BORDER-BOTTOM: medium none">
ducted air streams</span> <span class="130593719-15092009">supplied by <strong>System 1&2</strong>
</span>discharged <span class="466500520-16092009">separately to condition the same room..</span></font></font></font>
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Arial"><font size="2"><span class="466500520-16092009"></span><font color="#0000ff">.
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><span><font face="Arial" color="#0000ff" size="2"></font></span></p>
<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Arial"><font size="2"><font color="#0000ff"><span class="130593719-15092009">In addition, a floor mounted
</span>4-pipe fan coil<span class="130593719-15092009"> unit</span> system is used for <span class="130593719-15092009">the</span> <span class="466500520-16092009">building's
</span>parameter heating and cooling. </font></font></font></p>
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"></span><span class="514111018-16092009"><font face="Arial" color="#0000ff" size="2"><span class="466500520-16092009">So, i wonder if it's valid if i model the system as follow:</span></font></span></p>
<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><span class="514111018-16092009"><font face="Arial" color="#0000ff" size="2"><span class="466500520-16092009"></span></font></span> </p>
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<div dir="ltr" align="left"><span class="514111018-16092009"><span class="514111018-16092009"><font face="Arial" color="#0000ff" size="2">create three different zones within <span class="466500520-16092009">the
</span><span class="466500520-16092009">boundary of </span>th<span class="466500520-16092009">e</span> room and have them assigned to
<strong>System 1</strong>, <strong>System 2</strong> and the <strong>4-pipe fan coil system</strong> respectively (<span class="466500520-16092009">Also</span> specify the internal wall
<span class="466500520-16092009">that separates the three zones </span>to U=1<span class="466500520-16092009">
</span>) ?</font></span></span></div>
<div dir="ltr" align="left"><span class="514111018-16092009"><font face="Arial" color="#0000ff" size="2"><font face="Microsoft Sans Serif" color="#000080"><font face="Arial"><font color="#0000ff"><span class="514111018-16092009"></span></font></font></font></font></span> </div>
<div dir="ltr" align="left"><span class="514111018-16092009"><font face="Arial" color="#0000ff" size="2"><span class="514111018-16092009"><span class="466500520-16092009">Thank you.</span></span></font></span></div>
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<p class="MsoNormal"><span class="SpellE"><span style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Guo</span></span><span style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial"> Hong Ho | Jacobs | Mechanical Engineer | (312) 384.6347 | (773) 495.9693
mobile | <a href="mailto:Guo.Ho@jacobs.com">Guo.Ho@jacobs.com</a><span style="mso-spacerun: yes">
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