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I think this level of detail in modeling is unnecessary. In fact, I
don't think there's need for any enhancements to the thermal
modeling<br>
of the building to assess the comfort benefits of ceiling fans.
Ceiling fans do not change the thermal conditions of the space
(except for<br>
a little added heat generated by the fan motor). It provides
comfort through air motion experienced by the occupants. The
improved<br>
comfort can be quantified explicitly using Fanger's equation, or
implicitly if you calculate an equivalent temperature to that with
still air.<br>
<br>
<pre class="moz-signature" cols="90">Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 108D
Moraga CA 94556
<a class="moz-txt-link-abbreviated" href="mailto:yjhuang@whiteboxtechnologies.com">yjhuang@whiteboxtechnologies.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.whiteboxtechnologies.com">www.whiteboxtechnologies.com</a>
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"
</pre>
<br>
On 7/27/2011 3:41 AM, Paul Carey wrote:
<blockquote
cite="mid:20110727104140.66C408DB0028@zapata.dreamhost.com"
type="cite">Hi Deepak<br>
<br>
I think you can specify destratification fans so that would
essentially be the same. Other than that you could try splitting
the zone in 2 and letting internal air transfer between the zones
work out the exchange but that's not really the ideal way to do
it.<br>
<br>
Otherwise you probably need to think CFD and you'd be in the
realms of moving mesh transient CFD then and I wouldn't recommend
that.<br>
<br>
Not an easy one to solve really.<br>
Regards<br>
Paul<br>
<br>
<br>
<br>
Sent from my HTC<br>
<br>
Dr Paul Carey<br>
Director<br>
<br>
Zero Energy Design Ltd<br>
10a Portland Place<br>
2-22 Mottram Road<br>
Stalybridge<br>
Cheshire<br>
UK<br>
SK15 3AD<br>
<br>
Tel - +44 161 3386200<br>
Mob - +44 789 4098012<br>
Email - <a class="moz-txt-link-abbreviated" href="mailto:paul@zed-uk.com">paul@zed-uk.com</a><br>
<br>
<br>
<br>
----- Reply message -----<br>
From: "Deepak Tewari" <a class="moz-txt-link-rfc2396E" href="mailto:deepak.tewari@teri.res.in"><deepak.tewari@teri.res.in></a><br>
Date: Wed, Jul 27, 2011 08:34<br>
Subject: [Bldg-sim] Modelling of ceiling fan<br>
To: <a class="moz-txt-link-rfc2396E" href="mailto:bldg-sim@lists.onebuilding.org"><bldg-sim@lists.onebuilding.org></a><br>
<br>
Dear All,<br>
<br>
Is it possible to model the effect of ceiling fan on thermal
comfort<br>
conditions in Energyplus for hot and dry Indian climates.<br>
<br>
Thanks in advance for any suggestions.<br>
<br>
<br>
<br>
<br>
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</pre>
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