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<p class="MsoNormal">Hello all, <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-CA">I posted this awhile back and received no response. Testing my luck again and hoping someone will have some insight!
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Hello list,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">I thought the dehumidification calculation would be a relatively straightforward calculation for QUEST, however, I have some results that are a bit puzzling.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">I have a simple all-electric packaged VAV system that serves living quarters of an in-patient clinic. The system has 50% OA and uses an economizer. The system is designed to heat and dehumidify air only (no cooling, none
of my zones have cooling set point schedules). My dehumidification set point is 60% RH. The building is located in Chibougamau, Quebec (quite north) where cooling and dehumidification requirements are relatively small, but still exist. According to the SS-N
report, the maximum RH is never surpassed for my system. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">This is all fine and great until you start digging a bit deeper into the hourly results of the system in question. In my hourly data report I have the following variables : Total central heating/cooling coil outputs,
dehumidification reheat heat output, return air humidity ratio, mix air humidity ratio, humidity ratio of air leaving cool coil, Moisture added or removed from air for (de)humidification, and maximum humidity set point. The strange thing I noticed is that
my return air humidity ratio and mix air humidity ratio <u>NEVER</u> surpass my maximum humidity set point, yet I still have loads on my cooling coil during the summer, and moisture removed from the airstream. Furthermore, I noticed that there are 815 hours
during which there is a load on the cooling coil, but no humidity is removed from the airstream whatsoever (mix air humidity ratio = humidity ratio of air leaving cool coil). My team here has experienced these results in more than 1 simulation that have a
system with only dehumidification requirements on the cooling side.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">So my questions are: <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-CA"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-CA">How does eQUEST control the maximum humidity allowed in the supply airstream?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-CA"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-CA">How could one possibly explain a cooling load/consumption without any cooling set point schedules in any of the zones supplied by my system and
<u>zero</u> moisture removed from the air?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Any insights would be much appreciated!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Many thanks.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:FR-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA" style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:FR-CA">
</span><a href="http://www.bpa.ca/" target="''"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:blue;mso-fareast-language:FR-CA;text-decoration:none"><img border="0" width="85" height="88" style="width:.8854in;height:.9166in" id="_x0000_i1025" src="cid:image001.jpg@01D2D46E.1B3EB070" alt="Bouthillette Parizeau"></span></a><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:FR-CA"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial Black",sans-serif;color:#3F3F3F;mso-fareast-language:FR-CA">Jason</span></b><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial Black",sans-serif;mso-fareast-language:FR-CA"> <span style="color:#3F3F3F">Ng</span></span></b><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#7D7D7D;mso-fareast-language:FR-CA">_ing.
M.Sc.A.</span></b><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial Black",sans-serif;mso-fareast-language:FR-CA"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#A5A5A5;mso-fareast-language:FR-CA"><a href="mailto:jng@bpa.ca" title="Envoyer un courriel/Send email"><span lang="EN-CA" style="color:#A5A5A5">jng@bpa.ca</span></a></span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#A5A5A5;mso-fareast-language:FR-CA">
| </span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#A5A5A5;mso-fareast-language:FR-CA"><a href="http://www.bpa.ca" target="_blank" title="www.bpa.ca"><span lang="EN-CA" style="color:#A5A5A5">www.bpa.ca</span></a></span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#A5A5A5;mso-fareast-language:FR-CA"> | t:
5143833747x2813<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#BFBFBF;mso-fareast-language:FR-CA">Les informations contenues dans le courriel que vous venez de recevoir, y compris les pièces jointes, sont destinées à l’usage exclusif
de la (ou des) personne(s) identifiée(s) comme destinataires et sont confidentielles. Si vous n’en êtes pas le destinataire, soyez avisé que tout usage en est interdit. Si vous avez reçu ce courriel par erreur, veuillez le retourner à l’expéditeur et le supprimer
complètement de votre système informatique.</span><o:p></o:p></p>
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