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As the message states, if you want to calculate custom weighting
factors, i.e., FLOOR-WEIGHT=0, you have to input enough of the
space surfaces as delayed surfaces. It looks like you're modeling
the walls and ceiling as "quick" surfaces defined only by R-value or
conductance. You have to model them as delayed surfaces with
thermal mass, that means inputting them as LAYERS with material
properties of thickness, conductance, and specific-heat. <br>
<br>
Joe<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 11/11/2011 11:15 AM, Brian Lo wrote:
<blockquote
cite="mid:CAOWSk0dOnyqVAHcPWoeHsMFycWOTqRP4bGj4QGn3QSMtz4vJ5w@mail.gmail.com"
type="cite">
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charset=ISO-8859-1">
<p><span>I go the message:</span><span></span></p>
<p>
<span> </span></p>
<p>
<span>custom
weighting can not be calculated for SPACE EL1 Core Plnm
(B.C43) has 0 delayed
walls, 1 delayed floors and 0 delayed ceilings. There should
be at least a
delayed wall and floor, a delayed wall and ceiling, or a
delayed ceiling
and floor for custom weighting factors to be calculated.
ASHRAE weighting
factors with floor weight of 70 lb/ft2 (342 kg/m2).</span><span></span></p>
<p>
<span> </span></p>
<p>
<span> </span></p>
<p>
<span>How
can i fix this problem?</span><span></span></p>
<p>
<span> </span></p>
<p>
<span>Thanks</span><span></span></p>
<p>
<span>Brian</span><span></span></p>
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