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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regarding boiler HIR input vs. efficiency… Your reviewer’s commentary isn’t clear by your description, but you might find the attached recent discussion informative
regarding thermal vs. combustion efficiencies.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The issue of whether it’s appropriate to model boiler thermal efficiency (inclusive of flue/jacket losses), and if so exactly how, is to my best understanding
a bit of a toss-up right now for 90.1/LEED. The attached discussion thread takes the issue to the sidewalk’s end however, so I hope you can use this to figure out where your reviewer is coming from and how to respond in turn.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">~Nick<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img width="119" height="37" id="Picture_x0020_1" src="cid:image001.jpg@01CE7711.77AA9360" alt="cid:489575314@22072009-0ABB"></span><b><span style="font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-family:"Stylus BT","sans-serif";color:#2D4D5E">NICK CATON, P.E.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#CC9900">SENIOR ENGINEER<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Calibri","sans-serif";color:#CC9900"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">Smith & Boucher Engineers</span><span style="font-size:7.5pt;color:#CC9900"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">25501 west valley parkway, suite 200<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">olathe, ks 66061<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">direct 913.344.0036<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#2D4D5E">fax 913.345.0617<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="www.smithboucher.com" 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:"Calibri","sans-serif";color:blue">
</span></u><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>r s<br>
<b>Sent:</b> Tuesday, July 02, 2013 10:27 AM<br>
<b>To:</b> vamshi ranga<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Boiler HIR and Section G3.1.1<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi Vamshi,<o:p></o:p></p>
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<p class="MsoNormal">Just wondering, you say two buildings? Was there any MPR issue raised within PIf1 in the review about having only one building per LEED submittal?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Ramya<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, Jul 2, 2013 at 11:04 AM, vamshi ranga <<a href="mailto:vamshiranga@gmail.com" target="_blank">vamshiranga@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Dear All,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I have following doubts, I would be very grateful for your valuable time,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">1. We have modeled a boiler with 82% <b>combustion efficiency</b> in eQUEST with HIR = 1.219 which is just the inverse of boiler efficiency . But from LEED reviewer, we got comment saying that, HIR of 1.219 is equivalent to 77% efficiency.
Could you please let us know, how to convert combustion efficiency to HIR<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">2. We have two buildings, one is Main Office building (7 day week, 8hr running and Air-Conditioned, Main Office building has 5 to 7% of total two building areas) and the other is Factory+Office building (7 day week, Factory is 24 hr running
and Air-Conditioned with 100% of occupancy, lighting and equipment on all the time. While the Factory's Office is 24hr running and Air-Conditioned with 50% of occupancy, lighting and equipment on all the time) which are connected by enclosed bridge (air conditioned).
These buildings are modeled together in eQUEST and it comes to be System 7 (Boiler for heating) as per Table G 3.1.1. After reading it for many number of times and to confirm my understanding of the section, doubts are as follows on ASHRAE Appendix G Section
G3.1.1<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> - What should be the system type for Main Office building (Conditioned area is around 45000 Sq ft)? and let me know the exception of G3.1.1 if any gets applied<o:p></o:p></p>
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<p class="MsoNormal"> - What should be the system type for factory's Ground Floor Office building? (Area is around 150000 Sq ft) and Does the exception "Schedules that differ by 40
<b>equivalent </b>full load hours" gets applied? since the diversity is 50% for factory's office, if this exception is not applicable, let me know how the equivalent full load hours need to be calculated )<o:p></o:p></p>
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<p class="MsoNormal"> - What should be the system type for Factory's First Floor office building? (This floor is total office, and ground floor factory area is of double height from ground)<o:p></o:p></p>
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<p class="MsoNormal"> - Does the exceptions of Section G 3.1.1 applies at building level or at each system level? Exception "b" says both the things, so there is confusion<o:p></o:p></p>
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<p class="MsoNormal"> - Does the term "Peak thermal loads" in exception "b" consider the load added due to outside air as well?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Let me know, if you need any further clarification to resolve my doubts.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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<p class="MsoNormal">Vamshi.<o:p></o:p></p>
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