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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">When I run the file, the only months I see 0 for the difference between temperature of OA & room air is when the fan run hours are also 0 for those months.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">You have -999 for all hours of the fan schedule.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">From the manual:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">A value of -999 defines an optimum start period of up to six hours. During this period the fan start<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">time is delayed until the fan run time matches that needed to meet the desired zone temperatures.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Notice that this decision is made on an hourly basis, whereas in the real world it is made on much<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">smaller increments (ten minutes or less). For the hourly calculation, the number of hours needed to<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">bring each zone on the system up or down to its set point is estimated. If the number of such hours<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">for the majority of the zones is equal to or greater than the number of hours remaining in the start<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">period, the fans are turned on. The target zone temperatures used in the calculation are the heating and<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">cooling set point temperatures given in HEAT-TEMP-SCH and COOL-TEMP-SCH that correspond<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">to the first hour following the scheduled optimum start period.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img width="108" height="43" id="Picture_x0020_2" src="cid:image001.png@01D122CF.B4D44580" alt="cid:image003.png@01D09C46.E75BA0D0"></span><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1C467A"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1C467A">Christopher Jones,</span></b><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">
</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">P.Eng.<i>
<br>
</i></span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Senior Engineer<b><o:p></o:p></b></span></p>
<p class="MsoNormal"><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">WSP Canada Inc.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">2300 Yonge Street, Suite 2300<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Toronto, ON M4P 1E4</span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#595959"><br>
</span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">T +1 416-644-4226<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">F +1 416-487-9766<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">C +1 416-697-0056<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><a href="http://www.wspgroup.com/"><span style="color:blue">www.wspgroup.com</span></a>
</span><i><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#565656"><o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Morteza Kasmai<br>
<b>Sent:</b> Thursday, November 19, 2015 12:22 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Issue with SS-K Report<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<pre style="line-height:115%"><span style="font-family:"Arial","sans-serif";color:#274E13">Hello all,<br><br><o:p></o:p></span></pre>
<pre style="line-height:115%"><span style="font-size:11.0pt;line-height:115%;font-family:"Arial","sans-serif";color:#274E13">I have created identical<o:p></o:p></span></pre>
<pre style="line-height:115%"><span style="font-size:11.0pt;line-height:115%;font-family:"Arial","sans-serif";color:#274E13">"Minimum OA Schedule" for the baseline case and the proposed<o:p></o:p></span></pre>
<pre style="line-height:115%"><span style="font-size:11.0pt;line-height:115%;font-family:"Arial","sans-serif";color:#274E13">design. The schedule type is<o:p></o:p></span></pre>
<pre style="line-height:115%"><span style="font-size:11.0pt;line-height:115%;font-family:"Arial","sans-serif";color:#274E13">"Frac/Design" and have values of "0" when the outside air<o:p></o:p></span></pre>
<pre style="line-height:115%"><span style="font-size:11.0pt;line-height:115%;font-family:"Arial","sans-serif";color:#274E13">damper closed, and "-999" for other time of the day. After simulation<o:p></o:p></span></pre>
<pre style="line-height:115%"><span style="font-size:11.0pt;line-height:115%;font-family:"Arial","sans-serif";color:#274E13">runs, SS-K report of the baseline case model shows the difference between temperature<o:p></o:p></span></pre>
<pre style="line-height:115%"><span style="font-size:11.0pt;line-height:115%;font-family:"Arial","sans-serif";color:#274E13">of OA & room air “fan on hours” but this value in the SS-K report of the<o:p></o:p></span></pre>
<pre style="line-height:115%"><span style="font-size:11.0pt;line-height:115%;font-family:"Arial","sans-serif";color:#274E13">proposed design is “0”. Please find the attached pd2 and inp files of the model.<o:p></o:p></span></pre>
<pre style="line-height:115%"><span style="font-size:11.0pt;line-height:115%;font-family:"Arial","sans-serif";color:#274E13"><br>I was wondering if anyone could have look at the model and let me know if I<o:p></o:p></span></pre>
<pre style="line-height:115%"><span style="font-size:11.0pt;line-height:115%;font-family:"Arial","sans-serif";color:#274E13">missed something.<br><br><o:p></o:p></span></pre>
<pre style="line-height:115%"><span style="font-family:"Arial","sans-serif";color:#274E13">Thank you for your time,<o:p></o:p></span></pre>
<pre><span style="font-family:"Arial","sans-serif";color:#274E13">Morteza</span><span style="color:#274E13"><o:p></o:p></span></pre>
<pre><span style="color:#274E13"><o:p> </o:p></span></pre>
<pre><span style="color:#274E13;border:solid windowtext 1.0pt;padding:0in"><img border="0" width="100" height="100" id="_x0000_i1025" src="cid:~WRD000.jpg" alt="Image removed by sender."></span><span style="color:#274E13"><o:p></o:p></span></pre>
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