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Hi Cheney,<br>
<br>
I'm interested in your results for these equivalent models. Have you
tried a sensitivity test with respect to time step? I'm wondering
how much more closely the air temperature will match between the 3
"virtual zones" at shorter time steps.<br>
<br>
If you can, log down the mean radiant temperatures as well. My hunch
is that mean radiant will show more divergence than air temperature.<br>
<br>
Cheers<br>
<br>
Chris<br>
<br>
On 27/01/2011 06:42, Cheney wrote:
<blockquote
cite="mid:AANLkTimwAGDPOqP-Qeowjr=499vR1yjB7mtZzLoX6k+T@mail.gmail.com"
type="cite">
<div>Hi Chris and Curtis, </div>
<div> </div>
<div>An interesting topic...</div>
<div> </div>
<div>Curtis, please advice. The virtual partition, to my
understanding, is actually No partition. If there is no
partition, why color or spectrum characteristics will take
effect? I am not so familiar with Energy Plus, but does it have
two types of "virtual partition", one is IR transparent and one
is not? I also did a quick test in IES VE which can calculate
long wave radiant exchange. The way to define virtual partition
in IES VE is simply to cut a 100% hole on a solid partition. I
tested one room with a window first and the same room divided
into 3 equivalent spaces by virtual partitions. It shows the
results obtained from the two models are quite similar. It
accords with your test by Energy Plus. </div>
<div><br>
</div>
<div>Chris, I agree with you that virtual partition is not a
'must' to the perimeter zone. However, in some projects, it
is certainly a simplification: without putting up daylight
sensor and conducting extra lighting calculation, you can input
LPD obtained from lighting designer directly; Or sometimes
mechanical designer has specific design in perimeter area
and virtual partition method can easily accommodate it without
modifying the whole room...etc...etc... </div>
<div><br>
</div>
<div>Regards, </div>
<div>Cheney</div>
</blockquote>
<br>
<div class="moz-signature">-- <br>
<div>
<p>Chris Yates <span style="color: rgb(79, 98, 40);">C Eng
MCIBSE</span></p>
<p><i style="">Building Physics Consultant<o:p></o:p></i></p>
<p>Tel:<span style=""> </span>+447960731576</p>
<p>Email: <a class="moz-txt-link-abbreviated" href="mailto:chris.malcolm.yates@gmail.com">chris.malcolm.yates@gmail.com</a></p>
<p>Skype: <span class="SpellE">christopher.m.yates</span></p>
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