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<p class="MsoNormal"><span style="color:#366092;mso-fareast-language:EN-US">I pretty sure I read somewhere in one of DOE’s manual that the overload is the part of load that goes over capacity.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#366092;mso-fareast-language:EN-US">In your report, you see the heating capacity of the loop is 575 kBtu/h which is roughly equal to the net heating peak load of your loop. When the heat load exceeds that capacity, it
goes in overload and must be treated the following hour. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#366092;mso-fareast-language:EN-US">If you look at hourlies, you’ll see that it matches.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#366092;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#366092;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#366092"><img width="34" height="31" id="_x0000_i1026" src="cid:image002.jpg@01D15744.23696F40"></span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#366092"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial Black",sans-serif;color:#3F3F3F">Patrick</span></b><b><span style="font-size:10.0pt;font-family:"Arial Black",sans-serif;color:#366092"> </span></b><b><span style="font-size:10.0pt;font-family:"Arial Black",sans-serif;color:#3F3F3F">Lapierre</span></b><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#7D7D7D">_ing.</span></b><b><span style="font-size:10.0pt;font-family:"Arial Black",sans-serif;color:#366092"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#A5A5A5">plapierre@bpa.ca<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"> </span><span style="color:#366092;mso-fareast-language:EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="FR">De :</span></b><span lang="FR"> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>De la part de</b> Kathryn Kerns<br>
<b>Envoyé :</b> 22 janvier 2016 15:10<br>
<b>À :</b> equest-users@lists.onebuilding.org<br>
<b>Objet :</b> [Equest-users] WSHP System with PS-H Report Circulation Loop Overload<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Everyone, I made an energy model of a building being served by water source heat pumps attached to a typical water loop with a fluid cooler and a boiler. I let eQuest size all the equipment including the boiler and water
source heat pumps. The PS-H Water Loop report showed the following:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><img width="969" height="502" id="Picture_x0020_1" src="cid:image003.png@01D15744.23696F40"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Notice that in January, the peak heating load is -991.9 kbtu/hr, the peak net load is -576.1 kbtu/hr, and the peak over load is -355.6 kbtu/hr. eQuest sized the water loop boiler to be -576.1 kbtu/hr. I believe these
numbers are correct and the boiler size is correct but I cannot find an explanation in a document telling me how net load and over load is calculated and what they mean. I can explain how eQuest develops the heat load, but not the other two loads. I know a
typical hot water coil system has heat load peaks equal to net load peaks and the over loads are usually zero. I am pretty sure the over load value is related to the heat pump COP, but I would like to be able to point to a written piece of documentation explaining
this. Anybody know where to look?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">P.S. the energy model ran successfully with less than 10 heating hours out of throttling range.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black">Kathryn Kerns</span></b><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-family:"Arial",sans-serif">Systems Specialist</span></b><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;font-variant:small-caps;color:teal">BCE</span></b><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Times New Roman",serif;font-variant:small-caps;color:teal">
</span></b><b><span lang="EN-US" 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 lang="EN-US" style="font-size:9.0pt;font-family:"Times New Roman",serif;color:black">| Ph: 253.922.0446 | Fx: 253.922.0896 |</span></b><span lang="EN-US" style="font-size:7.0pt;font-family:"Times New Roman",serif;color:black">
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:13.5pt;font-family:"Arial",sans-serif;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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