[Equest-users] BDL Error
Kelsey VanTassel
KVanTassel at sustaineng.com
Wed Jun 2 06:43:01 PDT 2010
Hello Thomas,
I don't think you can make a construction where all the layers are R-value inputs. For a construction to have layers the program must be able to calculate some mass for the wall. If you want to specify only the thermal resistance of the wall choose "u-value input" when you create a new construction and put in the overall u-value for the wall assembly.
Kelsey Van Tassel
Mechanical Engineer | kvantassel at sustaineng.com<mailto:kvantassel at sustaineng.com>
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From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Thomas Vu
Sent: Tuesday, June 01, 2010 7:38 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] BDL Error
All,
I get the following BDL error in my model
WALL has no heat capacity. U-Value used.
I am modeling the baseline envelope as prescribed in Appendix G of 90.1-2004. Referring to Appendix A of 90.1-2004 to model the baseline envelope, I created layers for the wall construction seen in the attached screenshot. The resulting U-value for the wall is 0.124. Can I not model a wall in this manner? It seems specifying the U-value alone in the construction layer would do the same thing.
Thomas Vu, E.I.
Graduate Student
Dept. of Mechanical and Aerospace Engineering
University of Florida
vietdrum at ufl.edu
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