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To tell the truth I haven't a clue. You would think the sums
would agree. I did open one of my sim's and summed the roof
components for all my zones from the LS-E report and found the sum
didn't match the figure in the LS-F report, it was much higher. I
rarely use these reports and hadn't noticed this before. eQuest
does treat roofs as horizontal walls but on my sim I know I didn't
do any modifications which might have mixed things up. I took a
look at the "Detailed Simulation Reports Summary" and there was
nothing which stood out as an explanation. So the quickest thing to
do is pass this back to the group to see if we can find an answer.<br>
Bruce<br>
<br>
On 08/09/2011 09:33 AM, Jonathan Smith wrote:
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<p class="MsoNormal"><span style="color:#1F497D">Hi Bruce:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks you for
your reply. <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">The LS-F report
I’m reviewing is a building wide report which should be
inclusive of all spaces. As stated previously, MBTUs through
ROOF components is listed as zero. However, the space level
report (LS-E) for the one of the plenums with a roof
component shows heat loss of the roof component. This is
true for some of the other plenum spaces. Any ideas why the
space level report (LS-E) ROOF components are not reported
on the building wide report (LS-F) as roof components?<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">Jonathan<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<div style="border:none;border-top:solid #B5C4DF
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<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
Bruce Easterbrook [<a class="moz-txt-link-freetext" href="mailto:bruce5@bellnet.ca">mailto:bruce5@bellnet.ca</a>] <br>
<b>Sent:</b> Wednesday, September 07, 2011 9:08 AM<br>
<b>To:</b> Jonathan Smith<br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Roof vs Exterior Wall
Load<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:13.5pt">In the room
space the roof is actually the ceiling. Because the room
and plenum spaces are close or the same temperature there is
minimal or no heat loss between them. You need to go to the
plenum space for the heat loss through the exterior roof.
If you want the heat loss for the full floor to floor space
you have to add the room and plenum losses. The plenum will
have some wall surfaces as well.<br>
Bruce Easterbrook P.Eng.<br>
Abode Engineering<br>
</span><br>
On 06/09/2011 01:46 PM, Jonathan Smith wrote: <o:p></o:p></p>
<p class="MsoNormal">RE: Detailed Report, LS-F Building Monthly
Load Components <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Why would roof heat losses be zero in a
model defined with plenum spaces that have roofs components?
In report LS-F, there are no losses reported in ‘Roof’ and
‘Wall’ heat losses seem exceptionally high, as if ‘Roof’
losses are reported in ‘Walls’. <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">All spaces were created using the eQuest
wizard mode. Inspecting the “exterior surface properties”, the
word “Roof” appears below the surface name. All roof
constructions are made with layers input, having a U-Value 0f
0.043. When creating exterior surfaces in detailed edit mode,
no option exists for defining an exterior surface as a roof or
wall. <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">So, how are the loads associated with roofs
reporting in LS-F? What other reasons might roof loads not
report, or at least not report in the correct load component?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><b><span
style="font-size:9.0pt;font-family:"Arial","sans-serif"">Jonathan
R. Smith AIA LEED</span></b><span style="font-size:9.0pt">®</span><b><span
style="font-size:9.0pt;font-family:"Arial","sans-serif"">AP</span></b><o:p></o:p></p>
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<br>
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<br>
<o:p></o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre>
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