[Bldg-sim] comparing insulated core masonry block with stick built

[Jeff Haberl]

There have also been extensive studies of this by Christiansen and Kosney at ORNL using FD methods. Bottom line one can reasonably estimate the impact with transfer functions and layered walls by proportioning the walls. 

Jeff
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Jeff S. Haberl, Ph.D., P.E.............................jhaberl at esl.tamu.edu

Professor......................................................Office Ph: 979-845-6507

Department of Architecture.......................Lab Ph: 979-845-6065 

Energy Systems Laboratory.......................FAX: 979-862-2457 

Texas A&M University..............................77843-3581

College Station, Texas, USA.......................URL: www-esl.tamu.edu

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----- Original Message -----
From: bldg-sim-bounces at lists.onebuilding.org <bldg-sim-bounces at lists.onebuilding.org>
To: bldg-sim at lists.onebuilding.org <bldg-sim at lists.onebuilding.org>
Sent: Thu Jan 17 13:57:04 2008
Subject: [Bldg-sim] comparing insulated core masonry block with stick built

 

I’m doing a modeling comparison in REM/Rate of two identical houses except one has 8” insulated core masonry block walls whereas the second has 4” wood stud insulated walls. Both walls end up having comparable U values. REM/Rate shows negligible difference in energy usage. I am suspicious that REM/Rate does not model the thermal bridging and mass features very well. Would I be better served performing this comparison in DOE-2 or would the results not be that much different?