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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Christopher,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Yes, you could combine the indoor and outdoor rink loads into one schedule and recalculate the peak and peak fraction schedule since they’re served by the same plant. If they
weren’t you could use two different ExteriorFuel:Equipment objects to provide additional detail.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">I was originally going to model it explicitly in OpenStudio with the ice rink load modeled using the
<a href="https://bigladdersoftware.com/epx/docs/8-9/input-output-reference/group-non-zone-equipment.html#loadprofileplant">
LoadProfile:Plant</a> object, which has fields for a load schedule (W), peak flow rate, and flow fraction schedule. However, when I attempted to set the PlantLoop’s fluid type to a UserDefinedFluidType referencing FluidProperties:* objects for R-717 taken from
the EnergyPlus dataset, the sim failed because EnergyPlus only allows water, steam, and glycol.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<P style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><FONT
style="FONT-FAMILY: Verdana" color=#005c89><STRONG>Matt Steen</STRONG></FONT><FONT face=Verdana><FONT color=#005c89><BR
style="FONT-FAMILY: Verdana"></FONT><SPAN style="FONT-SIZE: 12pt"><FONT
color=#005c89><STRONG><SPAN style="FONT-SIZE: 11pt">ambient
energy</SPAN></STRONG></FONT></SPAN><BR><FONT face=Verdana><FONT
face=Verdana><SPAN style="FONT-SIZE: 9pt">303.278.1532 x 215
</SPAN></FONT></FONT></FONT></P></TD></TR></TBODY></TABLE></P><div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Jones, Christopher <Christopher.r.Jones@wsp.com>
<br>
<b>Sent:</b> Thursday, June 21, 2018 9:15 AM<br>
<b>To:</b> Matt Steen <msteen@ambient-e.com><br>
<b>Cc:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> RE: [Bldg-sim] Outdoor ice rink modeling<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you Matt, very helpful. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">With your methodology, would you be able to add the load and schedule to the central ice plant that is also serving two indoor ice rinks?
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Christopher R Jones, P.Eng.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif">T+ 1 416-644-0252<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><img border="0" width="60" height="29" style="width:.625in;height:.302in" id="_x0031_cc2331b-d8c3-424e-81de-2b17716d444e.png_x003f_ver_x003d_1495657656000" src="cid:image001.png@01D40941.19C3BED0" alt="cid:image001.png@01D40941.19C3BED0"><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Bldg-sim [<a href="mailto:bldg-sim-bounces@lists.onebuilding.org">mailto:bldg-sim-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Matt Steen via Bldg-sim<br>
<b>Sent:</b> Wednesday, June 20, 2018 6:30 PM<br>
<b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Bldg-sim] Outdoor ice rink modeling<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Hi Christopher,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">I just did this in OpenStudio/EnergyPlus, albeit not explicitly because EnergyPlus isn’t currently able to model a PlantLoop using refrigerant as the working fluid.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Here’s a summary of the system I modeled for an outdoor ~16k ft2 ice rink at a city park in Indiana.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">(1) Flooded Chiller (refrigerant/brine)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">(3) Compressors<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">(1) Evaporative Condenser (refrigerant/water)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">(1) Condenser Pump<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">(1) Condenser Fan<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">(3) Brine Pumps<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Here’s the methodology I used, which I plan to use to claim savings for LEED through an exceptional calculation.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoNormal" style="mso-list:l0 level1 lfo1"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Have the design engineer calculate the hourly cooling load on the plant using the weather data from the TMY file.<o:p></o:p></span></li></ol>
<p class="MsoListParagraph"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoListParagraph"><img border="0" width="480" height="288" style="width:5.0in;height:3.0in" id="Chart_x0020_1" src="cid:image002.png@01D40941.19C3BED0" alt="cid:image002.png@01D40941.19C3BED0"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p></o:p></span></p>
<p class="MsoListParagraph"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<ol style="margin-top:0in" start="2" type="1">
<li class="MsoNormal" style="mso-list:l0 level1 lfo1"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Adjust the cooling load profile to remove
</span>loads during the months when the ice rink is not expected to typically operate (Mar – Nov).<span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p></o:p></span></li></ol>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-indent:.5in"><img border="0" width="480" height="288" style="width:5.0in;height:3.0in" id="Chart_x0020_2" src="cid:image003.png@01D40941.19C3BED0" alt="cid:image003.png@01D40941.19C3BED0"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<ol style="margin-top:0in" start="3" type="1">
<li class="MsoNormal" style="mso-list:l0 level1 lfo1"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Calculate the gross COP of the plant by dividing the total cooling capacity (W) by the total HP (W) of the compressors, pumps, and fans.<o:p></o:p></span></li></ol>
<p class="MsoListParagraph"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<ol style="margin-top:0in" start="4" type="1">
<li class="MsoNormal" style="mso-list:l0 level1 lfo1"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Calculate the hourly electrical load of the plant by dividing the hourly cooling load (W) by the COP (W/W).<o:p></o:p></span></li></ol>
<p class="MsoListParagraph"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<ol style="margin-top:0in" start="5" type="1">
<li class="MsoNormal" style="mso-list:l0 level1 lfo1"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Determine the peak electrical load of the plant (W).<o:p></o:p></span></li></ol>
<p class="MsoListParagraph"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<ol style="margin-top:0in" start="6" type="1">
<li class="MsoNormal" style="mso-list:l0 level1 lfo1"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Calculate the hourly peak electrical load fraction by dividing the electrical load for each hour of the year by the peak electrical load, which
results in a constant (greater than zero) operating schedule during the ice rink season.<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><img border="0" width="480" height="288" style="width:5.0in;height:3.0in" id="Chart_x0020_5" src="cid:image004.png@01D40941.19C3BED0" alt="cid:image004.png@01D40941.19C3BED0"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p></o:p></span></p>
<p class="MsoListParagraph"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<ol style="margin-top:0in" start="7" type="1">
<li class="MsoNormal" style="mso-list:l0 level1 lfo1"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Adjust the peak electrical load fraction profile to account for the system cycling/staging on/off by setting fractions below 25% to zero. This
was my main assumption based on the number of compressors, so adjust to fit your project.<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormalCxSpMiddle" style="margin-left:.5in;mso-add-space:auto"><img border="0" width="480" height="288" style="width:5.0in;height:3.0in" id="Chart_x0020_8" src="cid:image005.png@01D40941.19C3BED0" alt="cid:image005.png@01D40941.19C3BED0"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<ol style="margin-top:0in" start="8" type="1">
<li class="MsoNormal" style="mso-list:l0 level1 lfo1"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">I used a Ruby script to add the annual hourly schedule as a ScheduleFixedInterval object to my model using the OpenStudio API (</span><a href="https://unmethours.com/question/14348/can-you-load-schedulefile-in-openstudio/"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">example</span></a><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">).<o:p></o:p></span></li></ol>
<p class="MsoListParagraph"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<ol style="margin-top:0in" start="9" type="1">
<li class="MsoNormal" style="mso-list:l0 level1 lfo1"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">The ice rink system was modeled using the EnergyPlus object
</span><a href="https://bigladdersoftware.com/epx/docs/8-9/input-output-reference/group-exterior-energy-use-equipment.html#exteriorfuelequipment"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Exterior:FuelEquipment</span></a><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">
with the Design Level field set to the peak electrical load in (W) and the peak electrical load fraction profile as the Schedule. For each hour of the year, the peak load value is multiplied by the peak load fraction to determine the energy use (Wh) during
the simulation. I used an OpenStudio measure to add this object to the model during the simulation.<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Hope that helps.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p><strong><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#005C89">Matt Steen
</span></strong><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#005C89"><br>
</span><em><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#005C89">Building Performance Engineer</span></em><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#FEBA0A"><br>
</span><strong><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#005C89">ambient energy</span></strong><b><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#005C89"><br>
</span></b><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#363636">1449 7th Street, Suite 440 | Denver, CO 80204</span><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#005C89"><br>
</span><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#363636">303.278.1532 x 215 |
</span><span style="font-size:10.0pt;font-family:"Times New Roman",serif"><a href="mailto:msteen@ambient-e.com"><span style="font-size:8.0pt;font-family:"Verdana",sans-serif">msteen@ambient-e.com</span></a></span><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#363636"><br>
</span><strong><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#FEBA0A">Denver •</span></strong><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#363636"> San Francisco
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</span></em><span style="font-size:10.0pt;font-family:"Times New Roman",serif"><a href="https://insider.msudenver.edu/rising-star-aes-building-shines-with-prestigious-honor"><i><span style="font-size:8.0pt;font-family:"Verdana",sans-serif">here</span></i></a></span><em><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#006184">.</span></em><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#006184"><br>
</span><a href="http://ambient-e.com/"><b><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;text-decoration:none"><img border="0" width="16" height="16" style="width:.1666in;height:.1666in" id="Picture_x0020_6" src="cid:image006.png@01D40941.19C3BED0" alt="cid:image006.png@01D40941.19C3BED0"></span></b></a><strong><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#FEBA0A">
</span></strong><a href="https://www.linkedin.com/company/ambient-energy/"><b><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;text-decoration:none"><img border="0" width="16" height="16" style="width:.1666in;height:.1666in" id="Picture_x0020_7" src="cid:image007.png@01D40941.19C3BED0" alt="cid:image007.png@01D40941.19C3BED0"></span></b></a><strong><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#FEBA0A">
</span></strong><a href="https://www.facebook.com/Ambient-Energy-102037989630/"><b><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;text-decoration:none"><img border="0" width="16" height="16" style="width:.1666in;height:.1666in" id="Picture_x0020_8" src="cid:image008.png@01D40941.19C3BED0" alt="cid:image008.png@01D40941.19C3BED0"></span></b></a><span style="font-size:8.0pt;font-family:"Verdana",sans-serif;color:#FEBA0A"> </span><span style="font-size:8.0pt;font-family:"Verdana",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Jones, Christopher <<a href="mailto:Christopher.r.Jones@wsp.com">Christopher.r.Jones@wsp.com</a>>
<br>
<b>Sent:</b> Wednesday, June 20, 2018 1:35 PM<br>
<b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> [Bldg-sim] Outdoor ice rink modeling<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello Simulistas,<o:p></o:p></p>
<p class="MsoNormal">I am working on a large community centre – swimming pools, indoor ice arenas, multi-purpose rooms, library, admin offices plus an outdoor ice rink cooled by the ice plant. I have experience modeling indoor ice rinks but not outdoor. Any
ideas?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Christopher R Jones, P.Eng.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif">T+ 1 416-644-0252<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><img border="0" width="60" height="29" style="width:.625in;height:.302in" id="Picture_x0020_9" src="cid:image001.png@01D40941.19C3BED0" alt="cid:image001.png@01D40941.19C3BED0"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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