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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hi Lei Lei,<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'>I can’t say whether eQuest/DOE2 is the ideal tool for your
research (that’s a question better answered by someone with
cross-platform experience), but from my limited experience I think your results
are not necessarily unreasonable. Note that while eQuest/DOE2 <u>can</u>
model the shading and solar reflective realities present in real world
buildings, it does not explicitly model any changes to the wind behavior
incident on a building. You may wish to address whether you do or do not
intend to account for the effects of windspeed on infiltration/envelope
U-values while exploring the shading effects of nearby buildings.<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=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><b><span
style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E'><span
style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span></span></b><![endif]><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>In
general, it would be odd if any set of building shades had an equal effect on
space heating and cooling consumptions. The magnitude of a fixed shade’s
effect on a building’s loads changes with the angle of the sun, which in
turn changes between the heating and cooling seasons. Further, most
buildings are either “cooling dominated” or “heating
dominated” due to a combination of their climate, internal loads and envelope
design. As an example, some buildings will have a minimal effect on their
heating loads from building shades as they’re highly insulated, have
significant internal loads and as such don’t need the additional solar
loads in the winter to begin with.</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=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><b><span
style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E'><span
style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span></span></b><![endif]><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I can
only speculate as this could be the result of a number of things, but perhaps a
location with less sun annually would observe a relatively higher impact from
losing that heating source during the winter? Have you confirmed the
areas you are defining as “higher solar radiation” reflect that in
the TMY2 data you’re using? Are the effects of daylighting controls
skewing your results? I’m guessing your locations might be within
Japan based on your university which I understand has a very wide range of
climates from Kyuushuu (subtropical) to Hokkaido (brr!) – if the goal is
to isolate the effects of building shading, you may do well to first observe
the differences within a single climate zone before moving your model all over...
<br>
<br>
</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=MsoListParagraph><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>A good amount of this is speculative (shots in the dark) –
but if all else fails there’s always the lingering possibility that
<u>what’s expected is wrong</u>. Sometimes our models can teach us
things when we least expect it!</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=MsoListParagraph><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><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Best of luck!<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><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><span style='color:#1F497D'><img width=119 height=37
id="Picture_x0020_1" src="cid:image001.jpg@01CB6E9F.2119B760"
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-size:11.0pt;font-family:"Stylus BT","sans-serif";
color:#2D4D5E'>NICK CATON, E.I.T.</span></b><b><span style='font-family:"Stylus BT","sans-serif";
color:#2D4D5E'><o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Calibri","sans-serif";
color:#CC9900'>PROJECT ENGINEER</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<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><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>Check out our new web-site @ </span></i><span style='font-size:
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style='font-size:10.0pt;color:blue'>www.smithboucher.com</span></a></span><u><span
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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<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>lei lei<br>
<b>Sent:</b> Saturday, October 16, 2010 3:18 AM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Questions about shading effect simulation with
eQUEST and DOE-2, Hope your help!<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal>Dear All:<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Please excuse me for I'm taking the liberty of sending
e-mail to you. I'm a PHD student of Nagoya University. Could I ask some
questions about the application of simulation tool eQUEST and DOE-2? <br>
<br>
In my research, I used the eQUEST to analyze the shading effect from nearby
buildings. However the simulation result seems to be not reasonable. I wonder
whether the eQUEST is suitable for these kinds of shading effect studies. Could
you please give me any suggestions?<br>
<br>
The research is about a building in the middle of a parallel layout buildings
group. It is focus on the building shades of nearby buildings. In order to
analyze the energy implication due to shading effect from nearby buildings,
rectangle shades are established nearby the simulated building with
BUIILDING-SHADE. The shading effect is denoted by the absolute difference
between the energy consumption of the building without surrounding building
shades and the building with surrounding building shades. The same model was
applied to a lot of cities (TMY data). It was found that:<br>
<br>
1) For all the cities, the more the shading
effect on space cooling the less the shading effect on space heating. (But, in
fact, for most of cities, when the solar radiation in summer is much, the solar
radiation in winter is relatively much also.)<br>
2) the shading effect in some cities with less
solar radiation is much more than that in some cities with more solor
radiation.( But in the documents of DOE-2, only the solar radiation will affect
the shading effect, when all the other situations are same except weather
data.) <br>
<br>
Could you please give me any suggestion to explain these results? Or are the
DOE-2 and eQUEST not suitable to do these kinds of shading effect analysis? If
so, could you give me any advice about any software can do the simulation of
nearby shading effect on building use?<br>
<br>
with best regards,<br>
-- <o:p></o:p></p>
</div>
<p>yours sincerely,<br>
<br>
Lei LEI<br clear=all>
<o:p></o:p></p>
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