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<p class=MsoNormal><span style='color:black'>Agreed, the Table 4 of the USGBC
memo shows baseline in Step 2 to be on-site plant or fossil fuel furnace at
code efficiencies, per Tables G3.1.1A and 1B.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'>David<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'>http://www.grummanbutkus.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
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<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"'>
bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Sam Mason<br>
<b>Sent:</b> Thursday, December 03, 2009 9:11 AM<br>
<b>To:</b> Ryan Del Balso; bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] LEED District Steam Rules: baseline step 1 vs
step2<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='color:#1F497D'>Ryan,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>If you look at Table 4 on page
7of the USGBC District Energy System Modeling Guidelines, you will see district
heating for step 2 can be either a heating plant (boilers) or furnaces. Since
your building falls under system type 3, I believe you would use Option 1 and
model fossil fuel furnaces for heating in step 2.<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'>Anyone else have a thought?<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'>Sam<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>--<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Sam Mason<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Atelier Ten<o:p></o:p></span></p>
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<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<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"'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Ryan Del
Balso<br>
<b>Sent:</b> Wednesday, December 02, 2009 5:41 PM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] LEED District Steam Rules: baseline step 1 vs step2<o:p></o:p></span></p>
</div>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I am working on a LEED energy model for a small <5000sf project
that has a hot water loop served by a campus district steam loop. I am
trying to follow the “Required treatment of District Thermal Energy in
LEED NC2.2” rules, but am unclear of the requirements it is asking
for. I understand the requirements for the proposed Step 1 and Step 2,
but the baseline requirements seem quite unclear to me.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>This building falls in the System 3: PSZ-AC with Fossil Fuel
Furnace heating type. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>My understanding of the requirements are as follows:<o:p></o:p></p>
<p class=MsoNormal>- Step 1 baseline: because it is supposed to be cost
neutral, I model the systems with a hot water loop and coils served by
purchased steam rather than the normal 90.1 System 3- fossil fuel furnace.<o:p></o:p></p>
<p class=MsoNormal>-Step 2 Baseline (this is where I am more unclear): <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'>Option 1: model this exactly as
described in App G, system 3: with a fossil fuel furnace with 90.1 efficiency
(i.e. no hot water loop and coils, and no steam boiler). <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'>Option 2: model this with the hot
water loop and coils as in step 1, and put in a hot water boiler with the
efficiencies listed in 90.1?<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'>Option 3: model this with the hot
water loop and coils as in step 1, and put in a steam boiler with the
efficiencies listed in 90.1?<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Please let me know if I am understanding step 1 correctly
and which option should be followed for step 2.<o:p></o:p></p>
<p class=MsoNormal>Thank you for your help. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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width=252 height=97 id="Picture_x0020_1"
src="cid:image001.jpg@01CA7407.7854D8E0" alt="154683_logo_final"><o:p></o:p></span></p>
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<p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:2.25pt;
mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:
column;mso-height-rule:exactly'><span style='font-size:10.0pt;font-family:
"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:2.25pt;
mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:
column;mso-height-rule:exactly'><b><span style='font-size:12.0pt;font-family:
"Arial Narrow","sans-serif";color:#17365D'>Ryan Del Balso, PE<o:p></o:p></span></b></p>
<p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:2.25pt;
mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:
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"Arial Narrow","sans-serif";color:#17365D'>ryan@ambient-e.com<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Arial Narrow","sans-serif";
color:#EEB500'>130 W. 5th Avenue, Denver, CO 80204 <o:p></o:p></span></b></p>
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mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:
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