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<p class="MsoNormal"><span style="font-family:"Franklin Gothic Book","sans-serif";color:#1F497D">Just a quick assumption: The furnace efficiency is ‘HIR’, check that value in the .inp file. Second, the gas furnace will run a part load much of the year leading
to a poorer seasonal efficiency. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Franklin Gothic Book","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:#1F497D"><img width="108" height="43" id="Picture_x0020_2" src="cid:image001.png@01D0D0DC.7B7BFC50" alt="cid:image003.png@01D09C46.E75BA0D0"></span><b><span style="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>
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<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>
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<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>Kathryn Kerns<br>
<b>Sent:</b> Thursday, August 06, 2015 3:52 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] PSZ Humidity Control<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Does anyone have a handle on how PSZ reheats to control space humidity? I can tell that it does some kind of sub-cooling and reheating because when you use DX-Furnace systems or Air to Air Heat Pump systems in an energy model and then include
50% maximum humidity, both the yearly cooling and heating energy used increases. However, the amount of heating and cooling energy used to control humidity in the PSZ-DX-Furnace energy model is significantly larger than the amount of heating and cooling energy
used to control humidity in the PSZ-Air to Air Heat Pump energy model. In both energy models, the DX cooling EIR is 0.2451 and the heat pump heating EIR is 1.0 and the furnace EIR is 1.0.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The amount of yearly heat used when no humidity control is present is 40 Mbtu for the PSZ DX-Furnace and 24 Mbtu for the PSZ-HP.<o:p></o:p></p>
<p class="MsoNormal">The amount of yearly heat used when 50% humidity control is present is 98 Mbtu for the PSZ DX-Furnace and 35 Mbtu for the PSZ-HP.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The yearly cooling increases associated with humidity control in each model show the same pattern but the differences aren’t so large. The envelope, weather file, people count, osa, etc. are the same in both models. The eQuest/DOE-2 documentation
on humidity references MAX-COND-RCVRY which is a variable that no longer appears to be use.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If anyone knows how PSZ works to control humidity, please contact me.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:black">Kathryn Kerns</span></b><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-family:"Arial","sans-serif"">Systems Specialist</span></b><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Times New Roman","serif";font-variant:small-caps;color:teal">BCE</span></b><b><span style="font-size:10.0pt;font-family:"Times New Roman","serif";font-variant:small-caps;color:teal">
</span></b><b><span style="font-size:12.0pt;font-family:"Times New Roman","serif";font-variant:small-caps;color:teal">Engineers, Inc.<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"Times New Roman","serif";color:black">| Ph: 253.922.0446 | Fx: 253.922.0896 |</span></b><span style="font-size:7.0pt;font-family:"Times New Roman","serif";color:black">
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:13.5pt;font-family:"Arial","sans-serif";color:black"> <o:p></o:p></span></p>
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