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<p class="MsoNormal"><a name="_MailEndCompose"><span style="color:#1F497D">Nick,<o:p></o:p></span></a></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">As always, thank you for the time you put into reviewing and responding to the forum questions/comments.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Apparently, there are some convergence issues within the model which the SIM file documents – hence the large size. Do I get some sort of plaque or medal for the largest SIM file record?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">At the end of the SIM file (which I was able to open with some effort), the last error basically read like this – ‘Whatever is happening is very unusual. Please send the file to the software development team,’
so I sent the file to Mr. Hirsch. Jeff. His response came quickly, but without a definite answer – see below. I’m glad and thankful those horrible rumors of eQUEST not be supported or developed anymore are totally false.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">We are looking into it. It seems to getting an error very early on in some cooling coil calculation during the initialization phase for the design day sizing calculations but rather than aborting
with an error continuing on into the simulation and producing gigabytes of convergence errors (when it should have not continued). But this is preliminary and we are trying to see what it is in detail so as to get a workaround.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">DOE-2.3 does an iterative design/sizing calculation stepping through all the components in a simulation mode with unspecified sizing to establish the required size for each component. This is very
different from 2.2 that does a one pass simplified static sizing calculation. In the model there is an error occurring in a cooling coil model call we are trying to isolate.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Attached is the beginning of the .sim with the cautions (I added design days for heating and cooling, removed the “dummy zone and system – not sure what it was for, and stopped the simulation just
after it was starting the initialization of the sizing calculations.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Here are the design routine warnings coming out before it goes on to try to perform the simulation and gets trapped into unending convergence problems that we need to trace down and fix.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Cooling Coil: Dummy Zone has a SENS-HEAT-RATIO<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> of 0.975, a RATED-EDB and EWB of 80.0 67.0F, and a rated<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> FLOW/CAPACITY of 252.1 cfm/ton. The SHR is too high, and<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> results in an outlet temperature of 53.30F; this is too<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> close to, or below, the apparatus dewpoint of 53.03F. The<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> coil bypass factor will be set to 0.01 and the SHR<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> decreased to 0.621<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Cooling Coil: (CRAC) (1) has a SENS-HEAT-RATIO<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> of 0.932, a RATED-EDB and EWB of 75.0 61.0F, and a rated<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> FLOW/CAPACITY of 453.0 cfm/ton. The SHR is too high, and<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> results in an outlet temperature of 52.78F; this is too<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> close to, or below, the apparatus dewpoint of 52.55F. The<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> coil bypass factor will be set to 0.01 and the SHR<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> decreased to 0.923<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Cooling Coil: (CRAC) (2) has a SENS-HEAT-RATIO<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> of 0.932, a RATED-EDB and EWB of 75.0 61.0F, and a rated<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> FLOW/CAPACITY of 453.0 cfm/ton. The SHR is too high, and<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> results in an outlet temperature of 52.78F; this is too<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> close to, or below, the apparatus dewpoint of 52.55F. The<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> coil bypass factor will be set to 0.01 and the SHR<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> decreased to 0.923<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Cooling Coil: (CRAC) (3) has a SENS-HEAT-RATIO<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> of 0.932, a RATED-EDB and EWB of 75.0 61.0F, and a rated<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> FLOW/CAPACITY of 453.0 cfm/ton. The SHR is too high, and<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> results in an outlet temperature of 52.78F; this is too<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> close to, or below, the apparatus dewpoint of 52.55F. The<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> coil bypass factor will be set to 0.01 and the SHR<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> decreased to 0.923<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Cooling Coil: (CRAC) (4) has a SENS-HEAT-RATIO<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> of 0.932, a RATED-EDB and EWB of 75.0 61.0F, and a rated<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> FLOW/CAPACITY of 453.0 cfm/ton. The SHR is too high, and<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> results in an outlet temperature of 52.78F; this is too<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> close to, or below, the apparatus dewpoint of 52.55F. The<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> coil bypass factor will be set to 0.01 and the SHR<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> decreased to 0.923<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Cooling Coil: (CRAC) (5) has a SENS-HEAT-RATIO<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> of 0.932, a RATED-EDB and EWB of 75.0 61.0F, and a rated<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> FLOW/CAPACITY of 453.0 cfm/ton. The SHR is too high, and<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> results in an outlet temperature of 52.78F; this is too<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> close to, or below, the apparatus dewpoint of 52.55F. The<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> coil bypass factor will be set to 0.01 and the SHR<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> decreased to 0.923<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Cooling Coil: (CRAC) (6) has a SENS-HEAT-RATIO<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> of 0.932, a RATED-EDB and EWB of 75.0 61.0F, and a rated<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> FLOW/CAPACITY of 453.0 cfm/ton. The SHR is too high, and<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> results in an outlet temperature of 52.78F; this is too<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> close to, or below, the apparatus dewpoint of 52.55F. The<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> coil bypass factor will be set to 0.01 and the SHR<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> decreased to 0.923<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Cooling Coil: (CRAC) (7) has a SENS-HEAT-RATIO<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> of 0.932, a RATED-EDB and EWB of 75.0 61.0F, and a rated<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> FLOW/CAPACITY of 453.0 cfm/ton. The SHR is too high, and<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> results in an outlet temperature of 52.78F; this is too<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> close to, or below, the apparatus dewpoint of 52.55F. The<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> coil bypass factor will be set to 0.01 and the SHR<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> decreased to 0.923<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Cooling Coil: (CRAC) (8) has a SENS-HEAT-RATIO<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> of 0.932, a RATED-EDB and EWB of 75.0 61.0F, and a rated<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> FLOW/CAPACITY of 453.0 cfm/ton. The SHR is too high, and<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> results in an outlet temperature of 52.78F; this is too<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> close to, or below, the apparatus dewpoint of 52.55F. The<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> coil bypass factor will be set to 0.01 and the SHR<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> decreased to 0.923<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**WARNING**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Air Handler: EL1 Sys1 (VAV) (G.N1) has a supply flow,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> either user-specified or set by FLOW/CAPACITY limits, that<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> is less than the sum of the minimum specified zone flow,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> MIN-FLOW/AREA. Zone flows will be reduced below the minimum<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> See report SV-A.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Zone: EL1 Core Zn (G.C5) has a user-specified<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> minimum airflow ratio less than required by the peak<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> exhaust flow. The minimum will be reset to: 1.000. To<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> control to either the minimum flow, or the hourly exhaust<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> flow, whichever is greater, use AIRFLOW-TRACKING = EXHAUST.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Zone: EL1 Core Zn (G.C19) has a user-specified<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> minimum airflow ratio less than required by the peak<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> exhaust flow. The minimum will be reset to: 1.000. To<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> control to either the minimum flow, or the hourly exhaust<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> flow, whichever is greater, use AIRFLOW-TRACKING = EXHAUST.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**WARNING**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Air Handler: EL2 Sys1 (VAV) (G.N1) has a supply flow,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> either user-specified or set by FLOW/CAPACITY limits, that<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> is less than the sum of the minimum specified zone flow,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> MIN-FLOW/AREA. Zone flows will be reduced below the minimum<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> See report SV-A.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Zone: Dummy Zone has a design heating<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> temperature differential of only -0.0F. The result<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> may be an unusually large design airflow. Supply/Zone T: 74.0 73.9<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> Zone: EL1 Mechanical/Electrical T has a user-specified<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> minimum airflow ratio less than required by the peak<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> exhaust flow. The minimum will be reset to: 0.279. To<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> control to either the minimum flow, or the hourly exhaust<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> flow, whichever is greater, use AIRFLOW-TRACKING = EXHAUST.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">There are a lot a lot of cautions related to plenum return with no plenum next to the zones with that return specified:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">**CAUTION**********************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> System: EL2 Sys1 (VAV) (G.N1) has return plenums defined,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> but Zone: EL2 North Perim Zn (G.N1) is not attached to a plenum,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> and no plenum shares an interior wall with the zone. The<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> zone will return its airflow via the first plenum found,
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> EL3 WNW Perim ML PlZn (ML.WNW2)
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I’ll try and post the solution once we find out what is going on, so everyone will be able to apply an temporary workarounds necessary to model systems similar to the one in this model.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Sincerely,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#1F497D"><table border="0" cellspacing="0" cellpadding="0" width="100%"><tr><!--MAKE-SURE-TO-SET-THE-TD-WIDTH--><td width="80" style="padding-right: 13px;" valign="top"><a href="http://www.archnexus.com"><img src="http://www.stationerycentral.com/SignatureImages10/ArchNexus-logo-80x99.png" nosend="1" border="0" width="80" height="99" alt='ARCH | NEXUS'></a></td><td width="1" valign="top" style="border-left: 1px #009AD9 solid;"> </td><td style="padding-left: 9px;"><table border="0" cellspacing="0" cellpadding="0" width="100%"><tr><td align="left" colspan="2"><span style="color: #52616E; font-family: 'Verdana', sans-serif; font-size: 11pt; font-weight: normal">DAVID W. GRIFFIN II</span></td></tr><tr><td style="padding-top: 6px;" align="left" colspan="2"><span style="color: #52616E; font-family: 'Verdana', sans-serif; font-size: 7.5pt;">BEMP</span><span style="color: #52616E; font-family: 'Verdana', sans-serif; font-size: 7.5pt;"><br>ENERGY ANALYST</span></td></tr><tr><td align="left" style="padding-top: 6px; padding-bottom: 6px;" colspan="2"><span style="color: #52616E; font-family: 'Verdana', sans-serif; font-size: 7.5pt;"> 2505 E Parleys Way<br>Salt Lake City, UT 84109 </span></td></tr><tr><td align="left" width="100%" style="padding-left: 3px; white-space: nowrap;"><span style="color: #52616E; font-family: 'Verdana', sans-serif; font-size: 7.5pt;"><b>Office</b> 801.924.5028 </span></td></tr><span style="color: #52616E; font-family: 'Verdana', sans-serif; font-size: 7.5pt;"></span><tr><td align="left" style="padding-top: 6px; padding-bottom: 0px; white-space: nowrap;" colspan="2"><span style="color: #52616E; font-size: 7.5pt; font-weight: normal; font-family: 'Verdana', sans-serif;"><a style="text-decoration: none; color: #52616E" href="http://www.archnexus.com"><font color="#52616E">archnexus.com</font></a></span></td></tr><tr><td align="left" style="padding-top: 6px; padding-bottom: 0px; white-space: nowrap;" colspan="2"><a href="https://twitter.com/arch_nexus"><img src="http://www.stationerycentral.com/SignatureImages10/ArchNexus-tw-sharp-L-29x22.png" nosend="1" border="0" width="29" height="22" alt="Twitter"></a><a href="https://www.facebook.com/pages/Architectural-Nexus/179588705397563?ref=ts&fref=ts"><img src="http://www.stationerycentral.com/SignatureImages10/ArchNexus-fb-sharp-L-29x22.png" nosend="1" border="0" width="29" height="22" alt="Facebook"></a><a href="https://www.youtube.com/channel/UCYRPWKF-yp-AUiI8ia2XfKw?feature=mhee"><img src="http://www.stationerycentral.com/SignatureImages10/ArchNexus-yt-sharp-L-29x22.png" nosend="1" border="0" width="29" height="22" alt="Youtube"></a><a href="https://www.linkedin.com/company/architectural-nexus"><img src="http://www.stationerycentral.com/SignatureImages10/ArchNexus-li-sharp-L-29x22.png" nosend="1" border="0" width="29" height="22" alt="LinkedIn"></a></td></tr></table></td></tr></table><style> a {color: #009AD9;} </style></span><span style="color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Nicholas Caton [mailto:Nicholas.Caton@schneider-electric.com]
<br>
<b>Sent:</b> Thursday, October 27, 2016 11:28 AM<br>
<b>To:</b> David Griffin II<br>
<b>Cc:</b> equest-users<br>
<b>Subject:</b> RE: Doe 2.3 Error<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I don’t have a lot of answers, but took a shallow dive that may be a little insightful:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I thought to look first at your chillers in the INP and something caught my eye by omission:<o:p></o:p></p>
<p class="MsoNormal"><img width="600" height="532" id="Picture_x0020_13" src="cid:image001.png@01D2305C.815BD790" alt="cid:image001.png@01D2305C.815BD790"><o:p></o:p></p>
<p class="MsoNormal"><br>
With the new, optional, series/parallel arrangement inputs I think we should be seeing something here along those lines for inputs. Looks like if you don’t add anything the default through the interface is to assume everything on the loop is in a parallel
configuration.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Look for the large-ish article occurring here in the doe2.3 reference manual (help files) to see what I’m not seeing, if that isn’t totally clear:<o:p></o:p></p>
<p class="MsoNormal">Volume 2: Dictionary<span class="d2hbreadcrumbslinkseparator"> >
</span>HVAC Components<span class="d2hbreadcrumbslinkseparator"> > </span>CIRCULATION-LOOP<span class="d2hbreadcrumbslinkseparator"> >
</span>Series vs. Parallel Equipment > Series/Parallel Configuration<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I haven’t tackled a series + parallel setup yet, but it seems at least implicit that you would need an equip-ctrl defined to land on that particular arrangement. Also looks like you’re missing the “mandatory” DOWNSTREAM-SPLIT input at
the loop for parallel/series configuration (as worded by the doe23 reference article).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It wouldn’t surprise me, btw, to learn the waterside economizer chiller is a special case to consider with series/parallel inputs… WSE chillers have always been a headache in my experience so I have a procedure to “roll my own” (it’s been
alluded to/posted here a few times).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Anecdotally: On my machine after trying to open & simulate with build v7173 & in doe2.3 mode, my simulation seemed to completely hang up and eQUEST was non-responsive here:<o:p></o:p></p>
<p class="MsoNormal"><img width="479" height="193" id="Picture_x0020_4" src="cid:image002.png@01D2305C.815BD790" alt="cid:image002.png@01D2305C.815BD790"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">… but then it completed with errors. On trying to open the SIM via eQUEST I get this:<o:p></o:p></p>
<p class="MsoNormal"><img width="523" height="277" id="Picture_x0020_5" src="cid:image005.png@01D2305C.815BD790" alt="cid:image005.png@01D2305C.815BD790"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">And… haha… you set a new record for the biggest SIM I’ve ever seen… notepad++ tells me it’s too large to even peek inside:<o:p></o:p></p>
<p class="MsoNormal"><img width="752" height="54" id="Picture_x0020_6" src="cid:image006.png@01D2305C.815BD790" alt="cid:image006.png@01D2305C.815BD790"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">All this leads me to consider: it’s possible there’s something specific to eQUEST getting hung up – you may after reviewing your series/parallel inputs want to try simulating this with doe2.3 command line?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hope that offers a few new perspectives!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">~Nick<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
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<p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif;color:#3A7A46">Nick Caton, P.E., BEMP</span></b><span style="color:#3A7A46"><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Equest-users [<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>David Griffin II via Equest-users<br>
<b>Sent:</b> Thursday, October 27, 2016 1:28 AM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Doe 2.3 Error<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi everyone,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I tried to be brave and take on the task of vetting DOE 2.3 - It has come with a few headaches. I thought I was getting the hang of it until eQUEST started throwing errors at me. Being less familiar with the DOE 2.3, I’m not finding success
trouble shooting the issue either. I have attached the file for everyone’s reference.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I tried rebuilding the model from scratch in case the file got corrupted somehow – no luck. That effort pointed me to the CHW loop/equipment, but nothing jumps out at me when I review the inputs. The water-side model tries to take advantage
of an ‘UPSTREAM’ water-side economizer in series with two chiller which operate in parallel. DOE 2.3 is supposed to explicitly model this scenario if I’m correct.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The air-side systems include VAVs w/ reheat for the office spaces, 2-pipe fan coils for the communication rooms, and water cooled CRAC units with humidification for the Labs/Data Center – server by an MAU. The equipment loads for these
spaces are considerably higher than what one might see in a typical office building.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m curious to see if we can figure out the error as a group. Additionally, I’m always open to learning from my mistakes, so if you see anything unusual in the model that might not be directly related to the issue at hand, I’m open to the
criticism.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks in advance!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif;color:#52616E">DAVID W. GRIFFIN II</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:#52616E">2505 E Parleys Way<br>
Salt Lake City, UT 84109 </span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
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