[Equest-users] Delayed wall warning

[Joe Huang]

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.

Joe

Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 108D
Moraga CA 94556
yjhuang at whiteboxtechnologies.com
www.whiteboxtechnologies.com
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"


On 11/11/2011 11:15 AM, Brian Lo wrote:
>
> I go the message:
>
> 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).
>
> How can i fix this problem?
>
> Thanks
>
> Brian
>
>
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