<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:12pt"><div><span>Thanks everyone for the inputs.</span></div><div><br><span></span></div><div><span>Currently i am working on the visual Doe software and this does not generate SS-R report. Therefore, i will have to rely on my 4 step procedure.</span></div><div><span><br></span></div><div><span>With regards to plant unmet hours, the total number of unmet hours is got in PS-D (Plant load satisfied) report. I can add this with system unmet to arrive at the total unmet hours.</span></div><div><br><span></span></div><div><span>Regards,</span></div><div><span>Rathnashree<br></span></div><div><br></div> <div style="font-family: arial, helvetica, sans-serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <font face="Arial" size="2"> <hr size="1"> <b><span
style="font-weight:bold;">From:</span></b> Nick Caton <ncaton@smithboucher.com><br> <b><span style="font-weight: bold;">To:</span></b> "Hintz, Scott Fredrick. (KSC-ISC-4011)[URS Federal Technical Services,Inc.]" <scott.f.hintz@nasa.gov>; "Bishop, Bill" <wbishop@pathfinder-ea.com>; Rathna Shree <rathnashreep@yahoo.in>; bldg <bldg-sim@lists.onebuilding.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Tuesday, 6 December 2011 4:46 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> RE: [Bldg-sim] Number of unmet hours<br> </font> <br><div id="yiv1509381424"><style><!--
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--></style><div><div class="yiv1509381424WordSection1"><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">Rathnashree and others,</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">I can further nail down the eQuest-specific procedural queries.</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">Summing the zone-level unmet hour reports (SS-R) can result in “double-counting.” I personally started out doing exactly that, but eventually learned better
=).</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">For the record, SS-R reports remain very useful for identifying & isolating the spaces/systems involved in a high-unmet hour situation. It’s also worth noting the same totals for each zone & system are much more easily reviewed under the ‘Summary’ tab under ‘Air-side HVAC’ following a simulation.</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">Some discussion on the topic in the archives may be misleading for those using eQuest version 3.64 and
onwards. We used to follow a specific “hunt and peck” procedure to correctly determine the number of unmet hours using the “hours fans on” output in report SS-E. Users of 3.64 onwards can enjoy a much more simplified approach: Look to the summary BEPS report! </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">Here is an excerpt from the BEPS report of a dummy file I have handy:</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div class="yiv1509381424Normal"><span style="font-size:8.0pt;font-family:"Courier New";">TOTAL SITE ENERGY 988.49 MBTU
39.5 KBTU/SQFT-YR GROSS-AREA 39.5 KBTU/SQFT-YR NET-AREA</span></div><div class="yiv1509381424Normal"><span style="font-size:8.0pt;font-family:"Courier New";">TOTAL SOURCE ENERGY 2860.57 MBTU 114.4 KBTU/SQFT-YR GROSS-AREA 114.4 KBTU/SQFT-YR NET-AREA</span></div><div class="yiv1509381424Normal"><span style="font-size:8.0pt;font-family:"Courier New";"> </span></div><div class="yiv1509381424Normal"><span style="font-size:8.0pt;font-family:"Courier New";">PERCENT OF HOURS ANY SYSTEM ZONE OUTSIDE OF THROTTLING RANGE = 15.68</span></div><div class="yiv1509381424Normal"><span style="font-size:8.0pt;font-family:"Courier New";">PERCENT OF HOURS ANY PLANT LOAD NOT SATISFIED = 0.00</span></div><div
class="yiv1509381424Normal"><span style="font-size:8.0pt;font-family:"Courier New";">HOURS ANY ZONE ABOVE COOLING THROTTLING RANGE = 6</span></div><div class="yiv1509381424Normal"><span style="font-size:8.0pt;font-family:"Courier New";">HOURS ANY ZONE BELOW HEATING THROTTLING RANGE = 427</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">Here, you can clearly see the model has a total of 6 unmet cooling hours and 427 unmet heating hours. Those are what some of us on the list have coined “coincidental
unmet hours,” so that’s to say there is no double-counting involved. If this were the results of a model following 90.1 appendix G, one would need to identify and correct problems in the model and/or system design to reduce that 427 figure to an acceptable level.</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">Hope that helps clarify!</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">~Nick</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">
</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"><img id="yiv1509381424_x0000_i1027" src="cid:1.1861431535@web95904.mail.in.yahoo.com" alt="cid:489575314@22072009-0ABB" height="37" width="119"></span><b><span style="font-size:11.0pt;font-family:"sans-serif";color:#2D4D5E;"></span></b></div><div class="yiv1509381424MsoNormal"><b><span style="font-size:11.0pt;font-family:"sans-serif";color:#2D4D5E;"> </span></b></div><div class="yiv1509381424MsoNormal"><b><span style="font-family:"sans-serif";color:#2D4D5E;">NICK CATON, P.E.</span></b><b><span style="font-family:"sans-serif";color:#2D4D5E;"></span></b></div><div class="yiv1509381424MsoNormal"><span
style="font-size:7.5pt;font-family:"sans-serif";color:#CC9900;">SENIOR ENGINEER</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:7.5pt;font-family:"sans-serif";color:#CC9900;"> </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:10.0pt;font-family:"sans-serif";color:#2D4D5E;">Smith & Boucher Engineers</span><span style="font-size:7.5pt;color:#CC9900;"></span></div><div class="yiv1509381424MsoNormal"><span style="font-size:10.0pt;font-family:"sans-serif";color:#2D4D5E;">25501 west valley parkway, suite 200</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:10.0pt;font-family:"sans-serif";color:#2D4D5E;">olathe, ks 66061</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:10.0pt;font-family:"sans-serif";color:#2D4D5E;">direct 913.344.0036</span></div><div class="yiv1509381424MsoNormal"><span
style="font-size:10.0pt;font-family:"sans-serif";color:#2D4D5E;">fax 913.345.0617</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"><a rel="nofollow" title="blocked::www.smithboucher.com"><span style="font-size:10.0pt;">www.smithboucher.com</span></a></span><u><span style="font-size:10.0pt;font-family:"sans-serif";color:blue;"> </span></u><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"></span></div></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in;"><div class="yiv1509381424MsoNormal"><b><span style="font-size:10.0pt;font-family:"sans-serif";">From:</span></b><span style="font-size:10.0pt;font-family:"sans-serif";">
bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Hintz, Scott Fredrick. (KSC-ISC-4011)[URS Federal Technical Services,Inc.]<br><b>Sent:</b> Monday, December 05, 2011 4:25 PM<br><b>To:</b> Bishop, Bill; Rathna Shree; bldg<br><b>Subject:</b> Re: [Bldg-sim] Number of unmet hours</span></div></div></div><div class="yiv1509381424MsoNormal"> </div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">Unmet hours for occupied hours only has been discussed but there was no good consensus on exactly how to do this. So, yes, unmet hours are of the entire (8,760) simulation and are building level, meaning one zone or all zones unmet that hour is still just one unmet hour.</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div
class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">Trane CDS has a good document for combating unmet hours in TRACE 700. I think it’s probably generic enough to be used for any tool.</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div><div><div class="yiv1509381424MsoNormal"><b><span style="font-size:10.0pt;font-family:"sans-serif";color:#1F497D;">Scott Hintz</span></b></div><div class="yiv1509381424MsoNormal"><b><span style="font-size:7.5pt;font-family:"sans-serif";color:#1F497D;">CEM, LEED-AP BD+C, BEMP</span></b><span style="font-size:10.0pt;font-family:"sans-serif";color:#17365D;"></span></div><div class="yiv1509381424MsoNormal"><span style="font-size:8.0pt;font-family:"sans-serif";color:#17365D;"> </span></div><div
class="yiv1509381424MsoNormal"><span style="font-size:8.0pt;font-family:"sans-serif";color:#17365D;">HVAC & Energy</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:8.0pt;font-family:"sans-serif";color:#17365D;">Sustaining Systems Engineering (SSE)<br></span><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"><img id="yiv1509381424_x0000_i1025" src="cid:2.1861431535@web95904.mail.in.yahoo.com" alt="cid:image003.jpg@01CB8011.2E333BA0" border="0" height="9" width="55"></span><span style="font-size:8.0pt;font-family:"sans-serif";color:#17365D;">Federal Technical Services</span><span style="font-size:8.0pt;font-family:"sans-serif";color:#17365D;"><br></span><span style="font-size:8.0pt;font-family:"sans-serif";color:#17365D;">PO Box 21025, M/C: ISC-4011<br>Kennedy Space Center, FL 32899</span></div><div class="yiv1509381424MsoNormal"><span
style="font-size:8.0pt;font-family:"sans-serif";color:#17365D;">Building: M6-493, Office: 1100H2<br>(321) 867-8533 office <br>(321) 867-5810 fax</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"><a rel="nofollow" ymailto="mailto:henry.d.turner@nasa.gov" target="_blank" href="mailto:henry.d.turner@nasa.gov"><span style="font-size:8.0pt;font-family:"sans-serif";">scott.f.hintz@nasa.gov</span></a></span><span style="font-size:8.0pt;font-family:"sans-serif";color:#17365D;"></span></div></div></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in;"><div class="yiv1509381424MsoNormal"><b><span style="font-size:10.0pt;font-family:"sans-serif";">From:</span></b><span
style="font-size:10.0pt;font-family:"sans-serif";"> Bishop, Bill [mailto:wbishop@pathfinder-ea.com] <br><b>Sent:</b> Monday, December 05, 2011 9:03 AM<br><b>To:</b> Rathna Shree; bldg<br><b>Subject:</b> Re: [Bldg-sim] Number of unmet hours</span></div></div></div><div class="yiv1509381424MsoNormal"> </div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">Rathna,</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">The simulation covers 8760 hours, but this does not imply 8760 hours of fan operation. I don’t see anything in Appendix G that requires you to prorate the 300 unmet load hours based on the schedules of building operation. So, just stick with the 300
hour threshold.</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">I suggest you follow your four-step procedure (in eQUEST or other DOE-2), except that I’ve never had unmet plant loads so I’m not sure how I would take that into account. I disagree with Ashu – adding up all the unmet hours in all SS-R reports can double-count (or more) coincident unmet hours.</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">Regards,</span></div><div class="yiv1509381424MsoNormal"><span
style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">Bill</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div><div class="yiv1509381424MsoNormal"><a rel="nofollow" ymailto="mailto:wbishop@pathfinder-ea.com" target="_blank" href="mailto:wbishop@pathfinder-ea.com"><b><span style="font-size:10.0pt;font-family:"sans-serif";color:black;text-decoration:none;"><img id="yiv1509381424Picture_x0020_1" src="cid:3.1861431535@web95904.mail.in.yahoo.com" border="0" height="118" width="481"></span></b></a><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"></span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div></div><div class="yiv1509381424MsoNormal"><span
style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in;"><div class="yiv1509381424MsoNormal"><b><span style="font-size:10.0pt;font-family:"sans-serif";">From:</span></b><span style="font-size:10.0pt;font-family:"sans-serif";"> bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Ashu Gupta<br><b>Sent:</b> Monday, December 05, 2011 5:45 AM<br><b>To:</b> 'Rathna Shree'; 'bldg'<br><b>Subject:</b> Re: [Bldg-sim] Number of unmet hours</span></div></div></div><div class="yiv1509381424MsoNormal"> </div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">Hi Ratnashree,</span></div><div class="yiv1509381424MsoNormal"><span
style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">You can directly see no of unmet hours for each system from SS-R report and total number of hours (all systems) should not be exceed 300 hours.</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">Thanks!</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;">Ashu</span></div><div class="yiv1509381424MsoNormal"><span style="font-size:11.0pt;font-family:"sans-serif";color:#1F497D;"> </span></div><div><div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0in 0in 0in;"><div class="yiv1509381424MsoNormal"><b><span style="font-size:10.0pt;font-family:"sans-serif";">From:</span></b><span style="font-size:10.0pt;font-family:"sans-serif";"> bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Rathna Shree<br><b>Sent:</b> Monday, December 05, 2011 3:59 PM<br><b>To:</b> bldg<br><b>Subject:</b> [Bldg-sim] Number of unmet hours</span></div></div></div><div class="yiv1509381424MsoNormal"> </div><div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;">Dear All,</span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;"> </span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span
style="font-family:"sans-serif";color:black;">The following is the procedure i use to calculate unmet hours:</span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;"> </span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;">1)<span class="yiv1509381424tab"> </span>Percentage of Plant and system unmet is got from BEPU report. </span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;"> </span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;">2)<span class="yiv1509381424tab"> </span>The number of hours fan is on is got from SS-E
report. </span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;"> </span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;">3)<span class="yiv1509381424tab"> </span>Percentage of system unmet(BEPU) multiplied by number of fan on hours(SS-E) gives the Unmet hours. </span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;"> </span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;">4)<span class="yiv1509381424tab"> </span>Plant and system unmet together should not exceed 300 hours.</span></div></div><div><div class="yiv1509381424MsoNormal"
style="background:white;"><span style="font-family:"sans-serif";color:black;"> </span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;">But as per ASHRAE 90.1, the 300hours of unmet is w.r.t. a simulation for 8760 hours. If the building is only 8 hours working 5 days a week, then the fan on hours vary. Will the same 300 hours hold good for 3500 hours of operation also.</span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;"> </span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;">The maximum percentage of Unmet for 8760 hours of operation is 3.4% amounting to 300 hours. Do we have to take 3.4% of the total fan on hours to calculate maximum unmet hours if the fan
on hours is anything other than 8760?</span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;"> </span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;">Please help.</span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;"> </span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;">Regards,</span></div></div><div><div class="yiv1509381424MsoNormal" style="background:white;"><span style="font-family:"sans-serif";color:black;">Rathnashree</span></div></div></div></div></div></div><br><br> </div> </div> </div></body></html>