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<p style="text-align: left; font-family: garamond,serif; color: rgb(51, 51, 51);" class="MsoNormal"><font size="2"><span style="font-size: 10pt;">Hello Sir,<br><br>
Thanks for the reply.<br>
I understand there are certain limitations with the approach because I am
attempting to model an external space using an enclosed zone. <br>
I need few more favors regarding the solution you explained for 24/265 simulation
in CFD. I am not very familiar with technicality of tools, weather files and such stuffs. But
I have to go in depth to solve the problem. So can you please help me out in this?
Could you explain me the programming part and things related to precede this. <br></span></font></p><p style="text-align: left; font-family: garamond,serif; color: rgb(51, 51, 51);" class="MsoNormal"><font size="2"><span style="font-size: 10pt;">I am trying Design Builder CFD tool. <br>
</span></font></p><p style="text-align: left; font-family: garamond,serif; color: rgb(51, 51, 51);" class="MsoNormal"><font size="2"><br></font></p><p style="text-align: left; font-family: garamond,serif; color: rgb(51, 51, 51);" class="MsoNormal">
<font size="2">Thanks</font></p><p style="text-align: left; font-family: garamond,serif; color: rgb(51, 51, 51);" class="MsoNormal"><font size="2"><br></font></p><p style="text-align: left;" class="MsoNormal"><font style="font-family: garamond,serif; color: rgb(51, 51, 51);" size="2">Rachit</font><br>
<span style="font-size: 10pt; font-family: Georgia; color: rgb(51, 51, 51);"></span></p><p style="text-align: left;" class="MsoNormal"><br><span style="font-size: 10pt; font-family: Georgia; color: rgb(51, 51, 51);"></span></p>
<p style="text-align: left;" class="MsoNormal"><span style="font-size: 10pt; font-family: Georgia; color: rgb(51, 51, 51);"></span><br></p><div class="gmail_quote">On Mon, Mar 30, 2009 at 9:14 PM, Vikram Sami <span dir="ltr"><<a href="mailto:VSami@lasarchitect.com">VSami@lasarchitect.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p><span style="font-size: 11pt; color: rgb(0, 37, 196);">Rachit,</span></p>
<p><span style="font-size: 11pt; color: rgb(0, 37, 196);"> </span></p>
<p><span style="font-size: 11pt; color: rgb(0, 37, 196);">When dealing with comfort conditions in passively conditioned
spaces, you’re going to have a hard time coming up with accurate models –
especially outdoor conditions. That being said, I think CFD is probably the best
equipped for this. Your hourly analysis program (like E+, eQUEST etc) use a
lumped node method of calculation – so a space (or thermal zone) will
have a single temperature, a wall has a uniform temperature. In a mechanically
conditioned space, this is a reasonable approximation since most often the air
is mixed and not stratified. However, in passively conditioned spaces, there is
often a larger degree of thermal variation within spaces – in both
temperature and MRT, so it becomes necessary to study it with full-field
solution tools like CFD. </span></p>
<p><span style="font-size: 11pt; color: rgb(0, 37, 196);"> </span></p>
<p><span style="font-size: 11pt; color: rgb(0, 37, 196);">One method to overcome the inability to do a 24/365 simulation
in cfd is to create temperature bins from your weather file and run separate
simulations for each bin. You can then approximate how many hours fall into
each bin. In most cases (especially the hotter hours), the temperature bins
will also correspond to times of day, so you might be able to get away with
doing a single sun position for each temp bin.</span></p>
<p><span style="font-size: 11pt; color: rgb(0, 37, 196);"> </span></p>
<p><span style="font-size: 11pt; color: rgb(0, 37, 196);">Hope this helps. </span></p>
<p><span style="font-size: 11pt; color: rgb(0, 37, 196);"> </span></p>
<p><b><span style="font-family: "Garamond","serif"; color: black;">Vikram Sami,</span></b><span style="color: rgb(0, 37, 196);"> </span><span style="font-family: "Garamond","serif"; color: black;">LEED AP</span><span style="color: rgb(0, 37, 196);"> <br>
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404-253-1466 | Direct Fax 404-253-1366</span><span style="color: rgb(0, 37, 196);"> </span></p>
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<p><span style="font-size: 24pt; font-family: Webdings; color: rgb(0, 127, 0);">P </span><span style="font-size: 10pt; font-family: "Garamond","serif"; color: rgb(0, 127, 0);">Think
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<p><span style="color: rgb(0, 37, 196);"> </span></p>
<p><span style="font-size: 11pt; color: rgb(0, 37, 196);"> </span></p>
<div style="border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; border-width: 1pt medium medium; padding: 3pt 0in 0in;">
<p><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;">
<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>RACHIT
KUMAR<br>
<b>Sent:</b> Monday, March 30, 2009 11:26 AM<br>
<b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> [Bldg-sim] Help: Simulation of External Zone_Courtyard</span></p>
</div><div><div></div><div class="h5">
<p> </p>
<div>
<p><span style="font-size: 10pt; color: rgb(51, 51, 51);">Hello <br>
<br>
I am trying to understand the thermal comfort of the courtyard with varying
proportions, height, glazing (building glazing adjacent to courtyard) in
different climatic zones of India. I want to study the thermal comfort only
till 10 feet height of the courtyard from ground level (average operable
temperature of the courtyard zone till 10 feet height). <br>
<br>
So few questions regarding model and simulation tools: <br>
1) Which tool can model and simulate outdoor spaces (courtyard) ?<br>
2) How to make a open courtyard as a zone? Courtyard is a part of building. <br>
3) I need to make a virtual horizontal partition in the courtyard at a height
of 10 feet from ground floor. <br>
<br>
I tried some simulation on Design Builder but could not get correct results. <br>
I don't want to use CFD because I am interested in hourly thermal performance
of the courtyard and want to find the comfortable hours throughout the year.
Kindly help me. <br>
<br>
Thanks <br>
<br>
Rachit</span><span style="color: rgb(51, 51, 51);">
</span></p>
</div>
<p> </p>
</div></div></div>
</div>
</blockquote></div><br>